RKI Instruments 65-2494RK User manual

www.rkiinstruments.com
65-2494RK/65-2497RK
Oxygen Detector
Operator’s Manual
Part Number: 71-0179RK
Revision: A
Released: 6/24/21

2 • 65-2494RK/65-2497RK Oxygen Detector
WARNING
Read and understand this instruction manual before operating detec-
tor. Improper use of the detector could result in bodily harm or death.
Periodic calibration and maintenance of the detector is essential for
proper operation and correct readings. Please calibrate and maintain
this detector regularly! Frequency of calibration depends upon the
type of use you have and the sensor types.
Typical calibration frequencies for most applications are between 3
and 6 months, but can be required more often or less often based on
your usage.

65-2494RK/65-2497RK Oxygen Detector • 3
Product Warranty
RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials,
workmanship, and performance for a period of one year from date of shipment from RKI Instruments,
Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of
charge. This warranty does not apply to those items which by their nature are subject to deterioration
or consumption in normal service, and which must be cleaned, repaired, or replaced on a routine basis.
Examples of such items are:
Warranty is voided by abuse including mechanical damage, alteration, rough handling, or repair
procedures not in accordance with the operator’s manual. This warranty indicates the full extent of our
liability, and we are not responsible for removal or replacement costs, local repair costs, transportation
costs, or contingent expenses incurred without our prior approval.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER
WARRANTIES AND REPRESENTATIONS, EXPRESSED OR IMPLIED, AND
ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF RKI
INSTRUMENTS, INC. INCLUDING BUT NOT LIMITED TO, THE WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL RKI INSTRUMENTS, INC. BE LIABLE FOR INDIRECT,
INCIDENTAL, OR CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND
CONNECTED WITH THE USE OF ITS PRODUCTS OR FAILURE OF ITS
PRODUCTS TO FUNCTION OR OPERATE PROPERLY.
This warranty covers instruments and parts sold to users by authorized distributors, dealers, and
representatives as appointed by RKI Instruments, Inc.
We do not assume indemnification for any accident or damage caused by the operation of this gas
monitor, and our warranty is limited to the replacement of parts or our complete goods.
a) Absorbent cartridges d) Batteries
b) Pump diaphragms and valves e) Filter elements
c) Fuses

4 • 65-2494RK/65-2497RK Oxygen Detector
Table of Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
65-2494RK Oxygen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Junction Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Mounting the Oxygen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Wiring the Oxygen Detector to a Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Introducing Incoming Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Replacing Components of the Oxygen Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Calibration Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Preparing for Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting the Fresh Air Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting the Zero Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

65-2494RK/65-2497RK Oxygen Detector • 5
Overview
This manual describes the 65-2497RK oxygen detector. This manual also describes how to install, start
up, maintain, and calibrate the oxygen detector when used with a gas monitoring controller. A parts list
at the end of this manual lists replacement parts and accessories for the oxygen detector.
The 65-2497RK oxygen detector includes the 65-2494RK oxygen detector and a junction box. This
manual may also be used for the 65-2494RK oxygen detector which does not include a junction box
and is normally mounted in one of a controller’s conduit hubs. If you are using a 65-2494RK oxygen
detector, disregard all references to the junction box and junction box terminal strip.
Specifications
WARNING: Do not use this product in a manner not specified in this instruction manual.
Table 1 lists specifications for the 65-2494RK and 65-2497RK oxygen detectors.
WARNING: When using the 65-2494RK/65-2497RK, you must follow the instructions and
warnings in this manual to assure proper and safe operation of the
65-2494RK/65-2497RK and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the 65-2494RK/65-2497RK as described in this
manual.
Table 1: Specifications
Target Gas Oxygen (O2)
Sampling Method Diffusion
Detection Range 0-25% oxygen
Response Time 90% in 30 seconds
Accuracy ± 0.5% O2
Operating Temperature -4°F to 113°F (-20°C to 45°C)

6 • 65-2494RK/65-2497RK Oxygen Detector
Description
This section describes the components of the 65-2494RK and 65-2497RK detectors. The
65-2497RK includes the 65-2494RK oxygen detector and a junction box. A two point terminal strip is
provided inside the junction box for detector connections. The 65-2494RK does not include a junction
box. Figure 1 below shows the components of the 65-2497RK.
Figure 1: 65-2497RK Component Location
65-2494RK Oxygen Detector
The 65-2494RK oxygen detector consists of the detector housing body, detector housing cap, cap
gasket, and the plug-in sensor.
Figure 2: 65-2494RK Oxygen Detector Component Location
Rubber
Spacer, 3X
Oxygen
Detector
J-Box
White Green
Terminal Block
3/4 NPT Conduit Hub
Detector
Housing Cap
Plug-in Oxygen Sensor
Detector Housing Body
Cap Gasket
Hydrophobic
Membrane

65-2494RK/65-2497RK Oxygen Detector • 7
Detector Housing Body
The detector housing body protects the electronic components within the housing. Use the mounting
threads at the top of the housing to screw the oxygen detector into a 3/4 NPT hub. Two wires extend
from the top of the detector housing body. Use these wires to connect the detector to a controller. One
of the wires is white and one of the wires is green.
The housing body includes two sockets installed on a circuit board. These sockets accept the plug-in
sensor’s two pins to provide an electrical connection for the sensor. The circuit board with the sockets
conditions the sensor’s signal before the signal reaches the controller.
Housing Cap & Cap Gasket
The housing cap screws onto the detector housing. It retains the plug-in sensor and protects it from
damage. A foam gasket inside the housing cap seals against the face of the sensor when the cap is
screwed on the housing body. A hydrophobic membrane on the outside of the cap face keeps water and
particulates away from the sensor face behind the cap. Unscrew the detector cap to access the plug-in
sensor for maintenance or replacement. A cap gasket seals the interface between the housing and cap.
Plug-in Sensor
The plug-in sensor is secured in the detector assembly by the housing cap. Through a series of
chemical and electrical reactions, the sensor produces an electrical output that corresponds to the
detection range of the detector. The sensing element used is a capillary type that is not susceptible to
output changes with changes in atmospheric pressure.
Junction Box
Use the junction box to install the oxygen detector at a mounting site that is remote from a controller
and to protect the detector wiring connections. Two conduit hubs allow you to mount the detector to
the junction box and connect the wiring from the detector to a controller. Three spacers installed on the
back of the junction box control the distance of the junction box from a mounting surface and ensure
that there is enough room to install a calibration cup on the detector during calibration. A terminal
block within the junction box facilitates the wiring connections. A cover on the front of the junction
box allows access to the interior of the junction box.
Installation
This section describes procedures to mount the oxygen detector in the monitoring environment and
wire the detector to a controller.
Mounting the Oxygen Detector
NOTE: If you are installing a 65-2494RK, it does not include a junction box and is usually factory
installed in one of a controller’s conduit hubs or may be field installed using the 3/4 NPT
threads on the end with the wires. The 65-2497RK includes a junction box as shown in
Figure 3 below.
1. Select a mounting site that is representative of the monitoring environment. Consider the
following when you select the mounting site.
• Select a site where the detector is not likely to be bumped or disturbed. Make sure there is
sufficient room to perform start-up, maintenance, and calibration procedures.
• Select a site where the target gas is likely to be found first.

8 • 65-2494RK/65-2497RK Oxygen Detector
NOTE: If your application does not require a specific mounting site, mount the detector at
approximately breathing level.
Figure 3: Outline & Mounting Dimensions, 65-2494RK & 65-2497RK
2. At the mounting site you select, hang or mount the junction box with the detector facing down (see
Figure 3).
Wiring the Oxygen Detector to a Controller
WARNING: Always verify that power to the controller is OFF before you make wiring
connections.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. If the detector is mounted remotely from a controller using the junction box, proceed to step 4.
If the detector is mounted directly to a controller, it is normally factory wired. Confirm that the
detector’s white and green wires are connected to the appropriate controller detector terminals and
skip to “Start Up” on page 10. See Figure 4, the controller operator’s manual, and the controller’s
detector head specification sheet for the 65-2494RK detector for the wiring connections.
4. Remove the junction box cover.
5. Guide a two-conductor, shielded cable or two wires in conduit through the unused conduit hub of
the junction box. Use appropriate conduit fittings and construction technique for the
environmental rating of the junction box. The junction box is rated NEMA 4X.
.38
.75
3.10
Rubber
Spacers
3X
+
7.30 .25
3.65
3/4" NPT
3/4 NPT
Female
65-2494RK
1 1/2-20 Thread for
Calibration Cup
Ø 1.75 J-Box
1 1/2-20 Thread for Calibration Cup
65-2497RK
Oxygen Detector
6.80 Max
.75
1.32

65-2494RK/65-2497RK Oxygen Detector • 9
6. Connect the two wires to the detector using the terminal block.
CAUTION: If using shielded cable, leave the drain wire insulated and disconnected at the detector.
You will connect the opposite end of the cable’s drain wire at the controller.
7. Secure the junction box cover to the junction box.
8. Route the cable or wires leading from the oxygen detector through one of the conduit hubs at the
controller housing. Use appropriate conduit fittings and construction technique for the
environmental rating of the controller. RKI controllers are typically rated NEMA 4X.
CAUTION: Do not route power and detector wiring through the same conduit hub. The power cable
may disrupt the transmission of the detector signal to the controller.
9. Connect the wires to the applicable controller terminal strip. See the controller operator’s manual
and the controller’s detector head specification sheet for the 65-2497RK detector.
Figure 4: Wiring the Oxygen Detector to a Controller
10. If using shielded cable, connect the cable’s drain wire to an available chassis ground at the
controller. RKI controllers typically have a ground stud that is a convenient grounding location.
Shielded Cable
Green (-)
White (+)
Controller Oxygen
Detector Terminals
J-Box
Oxygen Detector
Green
White
Controller Housing

10 • 65-2494RK/65-2497RK Oxygen Detector
Start Up
This section describes procedures to start up the oxygen detector and place the detector into normal
operation.
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that the power wiring to the controller is correct and secure. Refer to the controller
operator’s manual.
3. Turn on or plug in the incoming power, then turn on the controller.
4. Verify that the controller is on and operating properly. Refer to the controller operator’s manual.
CAUTION: Allow the detector to warm up for 5 minutes before you continue with the next section,
“Setting the Fresh Air Reading”.
Setting the Fresh Air Reading
CAUTION: If you suspect the monitoring environment is not a fresh air environment, use the zero air
calibration cylinder to introduce “fresh air” to the detector and verify an accurate fresh
air reading.
1. Verify that the oxygen detector is in a fresh air environment (environment known to be free of
toxic and combustible gases, and of normal oxygen content, 20.9%).
2. Verify a reading of 20.9% oxygen at the controller.
If the display reading is 20.9% oxygen, start up is complete. The oxygen detector is in normal
operation. If the display reading is not 20.9% oxygen, continue with step 3.
3. Perform a fresh air adjustment operation at the controller. See the controller operator’s manual for
instructions.
Maintenance
This section describes maintenance procedures. It includes preventive maintenance, troubleshooting,
and component replacement procedures.
Preventive Maintenance
This section describes a preventive maintenance schedule to ensure the optimum performance of the
oxygen detector. It includes daily and quarterly procedures.
Daily
Verify a display reading of 20.9% oxygen at the controller. Investigate significant changes in the
display reading.
Quarterly
Calibrate the detector as described in “Calibration” on page 14. See the calibration frequency
discussion in “Calibration Frequency” on page 14 to determine if a quarterly calibration schedule fits
your needs.

65-2494RK/65-2497RK Oxygen Detector • 11
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended action for
problems you may encounter with the oxygen detector.
NOTE: This troubleshooting guide describes detector problems only. See the controller operator’s
manual for problems you may encounter with the controller.
Table 2: Troubleshooting the Oxygen Detector
Condition Symptom(s) Probable Causes Recommended Action
Fail
Condition
• Controller
indicates a fail
condition.
• The detector wiring
is disconnected or
misconnected.
• The plug-in sensor is
not properly plugged
into the socket
pattern in the
detector housing
body.
• The detector’s zero
reading is low
enough to cause a
fail condition.
• The detector is
malfunctioning.
1. Verify that the detector wiring is
correct and secure.
2. Confirm that the plug-in sensor is
installed properly.
3. Perform a fresh air adjustment. A full
calibration is recommended.
4. If the fail condition continues, replace
the plug-in sensor as described later in
this section.
5. If the fail condition continues, contact
RKI for further instruction.
Slow or No
Response/
Difficult or
Unable to
Calibrate
• Unable to
accurately set the
fresh air or zero
reading during
calibration.
• Detector requires
frequent
calibration.
Note: Under
“normal”
circumstances, the
transmitter requires
calibration once
every 3 months.
Some applications
may require a more
frequent calibration
schedule.
• The calibration
cylinder is low, out-
dated, or defective.
• The calibration gas
is not an appropriate
concentration.
• The membrane on
the detector housing
cap is blocked with
dirt or some other
particulate
contamination.
• The detector is
malfunctioning.
1. Verify that the calibration cylinder
contains an adequate supply of a fresh
test sample.
2. Verify that the calibration gas
concentration is appropriate for the
transmitter. Zero emission air (20.9%
oxygen) is normally used for a fresh air
adjustment if the environment is
suspect and 100% nitrogen (0%
oxygen) is normally used for a zero
adjustment.
3. Check the sensor face for dirt. Clean if
necessary.
4. Check the face of the detector housing
cap and remove any particulate
contamination from the hydrophobic
membrane if necessary. If the
membrane appears saturated with
contamination or damaged, replace the
membrane as described in the next
section.
5. If the calibration/response difficulties
continue, replace the plug-in sensor as
described later in this section.
6. If the calibration/response difficulties
continue, contact RKI for further
instruction.

12 • 65-2494RK/65-2497RK Oxygen Detector
Replacing Components of the Oxygen Detector
This section includes a procedure to replace the plug-in oxygen sensor, one to replace the hydrophobic
membrane, and one to replace the entire oxygen detector assembly. In most cases, it is not necessary to
replace the entire detector assembly.
Replacing the Plug-in Oxygen Sensor
CAUTION: The plug-in sensor contains electrolyte which is an irritant. Do not disassemble the
sensor when replacing it with a new one. If sensor electrolyte comes in contact with your
skin, wash affected area thoroughly with soap and water.
1. Turn off the controller.
2. Turn off or unplug power to the controller.
3. Unscrew the detector housing cap from the detector housing body.
4. Unplug and remove the old oxygen sensor.
5. Carefully plug the replacement sensor into the sockets located in the detector housing body.
6. Make sure the cap gasket is in place and screw the detector housing cap back onto the detector
housing body.
7. Turn on power to the controller.
8. Turn on the controller and place into normal operation.
CAUTION: Allow the replacement sensor to warm up for 5 minutes before you continue with the next
step.
9. Calibrate the detector as described in “Calibration” on page 14.
Replacing the Hydrophobic Membrane
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. Unscrew the detector housing cap from the detector housing body.
4. Gently pry up the edge of the white hydrophobic membrane with a small flat blade screwdriver or
a similar tool.
5. Peel off the hydrophobic membrane. It may be necessary to clean off the detector housing cap face
to remove any residue left from the adhesive backed membrane.
6. Install the new membrane in the recess on the face of the detector housing cap.
7. Make sure the cap gasket is in place and screw the detector housing cap back onto the detector
housing body.
8. Turn on the power to the controller.
9. Turn on the controller.

65-2494RK/65-2497RK Oxygen Detector • 13
Replacing the Oxygen Detector
NOTE: In most cases, it is only necessary to replace the plug-in sensor.
1. Turn off the controller.
2. Turn off or unplug incoming power to the controller.
3. If the detector is installed directly on a controller, open the controller door.
If the detector is installed remotely from a controller in a junction box, remove the junction box
cover.
4. If the detector is installed directly on a controller, disconnect the detector leads from the detector
terminal strip in the controller. Note the position of the color-coded leads as you remove them.
If the detector is installed remotely from a controller in a junction box, disconnect the detector
leads from the terminal block in the junction box. Note the position of the color-coded leads as you
remove them.
5. Unscrew the detector from the controller conduit hub or junction box conduit hub.
6. Guide the detector leads of the replacement detector through the controller conduit hub or junction
box conduit hub, then screw the mounting threads of the detector into the hub. If necessary for
environmental conditions, apply thread sealant or Teflon tape to the hub and/or detector threads to
seal them.
7. If the detector is installed directly on a controller, connect the detector leads to the appropriate
detector terminal strip terminals. See Figure 4 on page 9 for wiring to a generic controller. See the
controller operator’s manual and the controller’s detector head specification sheet for the 65-
2494RK detector for wiring specific to your controller.
If the detector is installed remotely from a controller in a junction box, connect the detector leads
to the terminal block the same way the old detector was wired (see Figure 4 on page 9). See the
controller operator’s manual and the controller’s detector head specification sheet for the
65-2497RK detector to verify the connections to the controller are correct.
8. If the detector is installed remotely from a controller in a junction box, reinstall the junction box
cover.
9. Turn on or plug in power to the controller.
10. Turn on the controller and place into normal operation.
CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with the
next step.
11. Calibrate the replacement detector as described in “Calibration” on page 14.

14 • 65-2494RK/65-2497RK Oxygen Detector
Calibration Frequency
Although there is no particular calibration frequency that is correct for all applications, a calibration
frequency of every 3 months is adequate for most oxygen detector applications. Unless experience in a
particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of
every 3 months for the oxygen detector.
If an application is not very demanding, for example detection in a clean, temperature controlled
environment, and calibration adjustments are minimal at calibration, then a calibration frequency of
every 6 months is adequate.
If an application is very demanding, for example if the environment is not well controlled, then more
frequent calibration than every 3 months may be necessary.
Calibration
This section describes how to calibrate the oxygen detector. It includes procedures to prepare for
calibration, set the fresh air reading, set the zero reading, and return to normal operation. It describes
calibration using a calibration kit that includes a calibration cup, calibration gas, sample tubing, and a
fixed flow regulator with an on/off knob. RKI Instruments, Inc. recommends using a 0.5 LPM (liters
per minute) fixed flow regulator.
Preparing for Calibration
1. Screw the calibration cup onto the bottom of the oxygen detector.
2. Screw the regulator into the zero air calibration cylinder. Make sure the regulator is off. It is off
when the on/off knob is turned all the way clockwise.
3. Use the sample tubing to connect the regulator to the calibration cup.
NOTE: If you can verify that the oxygen detector is in a fresh air environment, you do not need to
apply zero air to the detector before adjusting the fresh air reading.
4. Put the controller into its calibration program. See the controller operator’s manual for instructions
to enter the calibration program.
Setting the Fresh Air Reading
1. Follow the instructions in the controller operator’s manual for setting the fresh air reading.
2. When the instructions call for applying zero air to the detector, turn the regulator’s on/off knob
counterclockwise to open it. Gas will begin to flow.
3. Allow the gas to flow for two minutes.
4. Set the fresh air reading according to the controller operator’s manual.
5. Turn the regulator’s on/off knob clockwise to close it.

65-2494RK/65-2497RK Oxygen Detector • 15
6. Unscrew the regulator from the zero air calibration cylinder. Leave the sample tubing connected to
the regulator and the calibration cup.
NOTE: Depending on the size of your zero air cylinder, it is possible that you will have a different
regulator for the zero air cylinder and the nitrogen gas cylinder. If necessary to fit the nitrogen
gas cylinder, change the regulator.
Setting the Zero Reading
1. Screw the regulator into the 100% nitrogen calibration cylinder. Make sure the regulator is off. It is
off when the on/off knob is turned all the way clockwise.
2. Follow the directions in the controller operator’s manual for setting the zero reading.
3. When the directions call for exposing the detector to gas, turn the regulator’s on/off knob
counterclockwise to open it. Gas will begin to flow.
4. Allow the gas to flow to the detector for 2 minutes.
5. Set the zero reading according to the controller operator’s manual.
6. After setting the zero reading, turn the regulator’s on/off knob clockwise to turn it off.
7. Unscrew the regulator from the cylinder.
8. Unscrew the calibration cup from the oxygen detector. Make sure that you do not loosen the
detector housing cap when you unscrew the calibration cup.
NOTE: For convenience, leave the regulator and calibration cup connected by the sample tubing.
9. Allow about 45 seconds for the gas reading to increase above the decreasing alarm point and then
return the controller to normal operation.
NOTE: If you do not allow the gas reading to increase above the decreasing alarm point, then
unwanted alarms may occur.
10. Verify that the controller display reading increases and stabilizes at 20.9% oxygen.
11. Store the components of the calibration kit in a safe and convenient place.

16 • 65-2494RK/65-2497RK Oxygen Detector
Parts List
Table 3 lists replacement parts and accessories for the oxygen detector.
Table 3: Parts List
Part Number Description
06-1248RK-03 3 foot length of sample tubing for the calibration kit
07-0039RK Detector housing cap gasket
18-0400RK-01 Junction box with rubber spacers
33-0157RK Hydrophobic membrane
65-1025RK Oxygen plug-in sensor
65-2494RK Oxygen replacement detector assembly (includes sensor)
71-0179RK 65-2494RK/65-2497RK Oxygen Detector Operator’s Manual (this document)
81-0076RK Zero air calibration cylinder, 17 liter
81-0076RK-01 Zero air calibration cylinder, 34 liter steel
81-0076RK-03 Zero air calibration cylinder, 103 liter
81-0078RK 100% nitrogen calibration cylinder, 17 liter
81-0078RK-01 100% nitrogen calibration cylinder, 34 liter steel
81-0078RK-03 100% nitrogen calibration cylinder, 103 liter
81-F301RK Calibration kit for oxygen detector head, 103 liter
81-F301RK-LV Calibration kit for oxygen detector head, 34 liter
81-1050RK Regulator with gauge and knob, 0.5 LPM, for 17 liter and 34 liter steel cali-
bration cylinders (cylinders with external threads)
81-1051RK Regulator with gauge and knob, 0.5 LPM, for 34 liter aluminum, 58 liter, and
103 liter calibration cylinders (cylinders with internal threads)
81-1117RK Calibration cup