Honeywell CRIR-E1 User manual

Solent Gas Consultants Ltd
Specialists in Gas Detection
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Carbon Dioxide CRIR-E1 User Guide
Commercial Carbon Dioxide CRIR-E1

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Honeywell CRIR-E1 User Guide
TABLE OF CONTENTS
GENERAL INFORMATION
SENSOR HANDLING
AUTOMATIC BASELINE CORRECTION
TERMINATION
CALIBRATION
SELF-DIAGNOSTICS
MODBUS REGISTER DEFINITION
MODBUS FUNCTION DESCRIPTION

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GENERAL INFORMATION
Honeywell’s CRIR E1 Commercial Carbon Dioxide (CO2) sensor is a single channel, non-
dispersive infrared (NDIR) sensor. Within the CRIR E1 is a sensing chamber with an
infrared source at one end and a detector tted with an optical lter at the other end.
The source emits radiation at wavelengths which include the absorption band of CO2.
The lter blocks wavelengths which are not sensitive to the presence of CO2, thereby
increasing selectivity and sensitivity. As the light passes through the sensing chamber,
a fraction is absorbed if CO2is present. The difference between the light emitted by
the source and received by the detector can then be converted to a CO2concentration
reading. The Automatic Baseline Correction (ABC) function can automatically calibrate
the sensor’s lowest reading over a pre-congured interval to 400 ppm CO2. This
enhances long term stability and may eliminate the need for calibration.
See Tables 1 and 2, and Figures 1 and 2 for specications and mounting and
dimensional diagrams.

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CHARACTERISTIC PARAMETER
Target Gas Carbon dioxide (CO2)
Operating Principle Non-dispersive infrared (NDIR)
Standard Range 1, 2 400 ppm to 2000 ppm, up to 5000 ppm extended range
Measurement interval 4 s
Accuracy 3±50 ppm ±5% of reading
Typical response time (T90) <120 s
Sensor warm-up time 3 minutes typical
Repeatability >97%
Operating voltage 4.5 to 5.5 V unprotected against surges and reverse connection
Power consumption 300 mA peak, 30 mA average
Alarm output, open collector 1000 ppm / 800 ppm normal state is conducting max 100 mA.
Transistor open at CO2high or at sensor failure (see Figure 1).
Serial communication 5UART, Modbus protocol
Operating temperature range 0°C to 50°C
Storage temperature range -40°C to 70°C
Operating humidity 0 %RH to 90 %RH non-condensing
Expected operating life 10 years
Maintenance 6Maintenance-free for normal indoor applications
Weight <8 g
Dimensions 33 mm x 22 mm X 11,2 mm (tolerance ±0,5 mm)
Table 1 - Product Specifcation
1 The CRIR E1 is designed to measure CO2 in the range of 400 ppm to 2000 ppm with the accuracy specied in Table 1;
however, exposure to concentrations below 400 ppm may result in incorrect operation of the ABC algorithm and should
be avoided when the ABC is ON.
2 The CRIR E1 provides readings via UART in the extended range; however, the accuracy is reduced.
3 In normal IAQ applications, the sensor accuracy is dened after a minimum of three ABC periods of continuous
operation.
4 The sensor accuracy is specied over the operating temperature range and referenced to certied calibration
mixtures. Uncertainty of calibration gas mixtures (±1% currently) is to be added to the specied accuracy for absolute
measurements.
5 See Sections 7.0 and 8.0 for Modbus address and parameter denitions.
6 The CRIR E1 normally does not require maintenance in IAQ applications; however, for some industrial applications,
maintenance may be required.
Figure 1 - Alarm State Diagram

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Figure 2. Mounting Dimensions (mm) - for reference only
PIN
NUMBER FUNCTION
1DAC
2 UART_RXD
3 UART_TXD
4 UART_R/T
5 bCAL_in/CAL_in
6 PWM output (See CRIR E1 User Manual)
7Alarm output
8GND
9Vin_(4.5 V to 5.5 V)
Table 2. Pinout

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CAUTION
IMPROPER SENSOR HANDLING
• The CRIR E1 is an electrostatic-sensitive
device (ESD).
• Handle the CRIR E1 using appropriate ESD
methods such as electrostatic dissipative
gloves, wrist straps, etc.
• Handle the CRIR E1 by the black PCB on the
edges as shown in Figure 1.
• Ensure that the gas diffusion area shown in
Figure 1 is not blocked or contaminated.
• Ensure that force is not applied to the CRIR
E1’s optical chamber,
• Ensure that the CRIR E1 is not subject to
drops and vibration.
Failure to comply with these instructions may
result in product damage.
SENSOR HANDLING
CAUTION
EXPOSURE TO HARMFUL GASES
Ensure that the CRIR E1 does not come into
contact with the following harmful gases:
• Acidic: Includes HCl, HF, H2S, SO2, NOx, etc.
• Basic: Includes NH3, PH3, N2H4, etc.
• Strong oxidizing: Includes Cl2, F2, O3, H2O2,
etc.
Failure to comply with these instructions may
result in product damage.
NOTICE
To extend the CRIR E1’s lifetime, ensure that it
does not come into contact with salt spray, oil
mist, soot, and high humidity.
Figure 3 - CRIR E1 Appearance

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AUTOMATIC BASELINE CORRECTION (ABC)
Honeywell’s CRIR E1’s built-in, self-correcting ABC algorithm allows maintenance-free operation in
normal indoor environments. This algorithm automatically calibrates the sensor’s lowest reading
over a precongured time interval to 400 ppm CO2, the expected CO2concentration in fresh air, thus
compensating for sensor drift.
Table 3 shows the ABC period specications. Please refer to Modbus Function Description section for
setting the ABC period.
CHARACTERISTIC PARAMETER
ABC Periods 14 hours to 4800 hours (default is 180 hours)
Table 3 - ABC Period Specication
1 ABC periods can be congured per the user’s requirements. The available range is 4 hours to 4800 hours, and it must
be an integer multiple of 4.
NOTICE
Exposing the CRIR E1 to CO2 concentrations below 400 ppm may result in incorrect operation of
the ABC algorithm and shall be avoided when the ABC function is ON. For how to switch the ABC
function on/off, refer to Modbus Function Description section.
One ABC period (n hours) requires the completion of n/4 intervals of four hours of operation per
interval. The CRIR E1, however, does not necessarily need to operate continuously for n hours to
activate the ABC function. The CRIR E1 counts the number (m) of completion of 4 hour intervals. If m
reaches n/4, the ABC function is activated. For each four hour interval, however, the CRIR E1 must
operate continuously, otherwise its contribution to m is not counted.
For example, if the sensor powers off after 6 hours of operation, the rst four hours of operation
is counted as the completion of one 4 hour interval, which is added to m and stored in the sensor
memory. The remaining two hours of operation, however, do not count because the four hour
requirement is not met. Therefore, they are not recorded after the power off. To complete the next
4 hour interval, the CRIR E1 must be powered on and operate continuously for another 4 hours.

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TERMINATION
Table 4 - Termination - I/O Options Dedicated to the CRIR E1
PIN NUMBER PIN FUNCTION DESCRIPTION ELECTRONIC SPECIFICATION
Power Pins
8GND Power supply minus terminal
Sensor’s reference (ground) terminal
-
-
9Vin Power supply plus terminal
Operation voltage range
Unprotected against reverse connection
4.5 V to 5.5 V
Communication Pins
2UART_RxD
UART data receive line congured as
digital output
Absolute maximum voltage range1
Internal pull up to VDD resistor
Input low level1
Input high level1
No internal protection pulled up to VDD at
processor reset (power up and power
down)
GND to VDD + 0.5 V
120 k
GND to 0.75 V
3UART_TxD
UART data transmission line congured as
digital output
Absolute maximum voltage range1
Internal pull up to VDD resistor
Output low level1
Output high level1
No internal protection, pulled up to VDD
at processor reset (power up and power
down)
GND to VDD + 0.5 V
120 k
0.4 VDC maximum at 8 mA sink
4UART_R/T
Direction control line for half duplex,
RS485 transceiver like MAX 485
congured as digital output
Absolute maximum voltage range1
Internal pull down to GND resistor
Output low level1
Output high level1
No internal protection, pulled down at
processor reset (power up and power
down)
GND to VDD + 0.5 V
120 k
0.4 VDC maximum at 8 mA sink
2.4 VDC minimum at 8 mA source
Input/Output Pins
1DAC
DAC output congured as analog output
used for direct reading by customer’s
microcontroller or to provide analog output
Normal concentration range
Normal voltage range
Relationship between output voltage (V)
and CO2 concentration (ppm)
Output accuracy
No internal protection, pulled down at
processor reset (power up and power
down)
400 ppm to 2000 ppm
0.72 V - 0.05 V to 2 V - 0.1 V
V(output) = 0.4 + 0.0008 x C(CO2)
±20 mV
1 The specied parameter relies on the subcontractor's specication and is not tested by Honeywell.

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Table 4 - Termination - I/O Options Dedicated to the CRIR E1 (continued)
PIN NUMBER PIN FUNCTION DESCRIPTION ELECTRONIC SPECIFICATION
5bCAL_in
/CAL
Digital input forcing background or zero
calibration
Background calibration: When closed for
minimum 4 s, maximum 8 s, bCAL
(background calibration) assuming 400
ppm CO2exposure.
Zero calibration: when closed for
minimum 16 s CAL (zero calibration)
assuming 0 ppm CO2
exposure
Absolute maximum voltage range1
Internal pull down to GND resistor
Input low level1
Input high level1
No internal protection, pulled up to VDD2
at processor reset (power up and power
down)
GND to VDD + 0.5 V
120 k
GND to 0.75 V
2.3 V to VDD + 0.3 V
6PWM
PWM output congured as digital output
used fordirect reading by customer’s
microcontroller or to provide analog
output.
Normal concentration range
PWM cycle time
Beginning of each cycle
End of each cycle
Relationship between CO2concentration
(ppm) and PWM output
PWM resolution
Absolute maximum voltage range1
Internal pull down to GND resistor
Output low level1
Output high level1
No internal protection, pulled down at pro-
cessor reset (power up and power down)
400 ppm to 2000 ppm
1004 ms ± 5%
high level output, 2 ms
low level output, 2 ms
C(CO2) = 2000 x (TH - 2) / (TH + TL - 4)
TH: time (ms) of high level output in a cycle
TL: time (ms) of low level output in a cycle
0.5 ms ± 4%
GND to VDD + 0.5 V
120 k
0.4 VDC maximum at 8 mA sink
2.4 VDC minimum at 8 mA source
7Alarm_OC
Open collector output for alarm indication
Absolute maximum voltage range1
Internal pull up to G+ resistor
Maximum sink current1
Saturation voltage1
no internal protection, pulled up to G+
at processor reset (power up and power
down)
GND to 5 V + 0.5 V
10 k
100 mA
2.3 V to Vin + 0.3 V
1 The specied parameter relies on the subcontractor's specication and is not tested by Honeywell.
CALIBRATION
With the ABC function on, the sensor readings, which may have drifted due to mishandling during
transportation and/or installation, may gradually be recalibrated to the correct numbers. However, in
case the user cannot wait for several cycles of ABC to run, the two quick manual calibrations given in
5.1 and 5.2 may be performed.

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Table 5 - Default Settings of BCAL_IN and CAL_IN
INPUT DEFAULT FUNCTION
bCAL_in Available when closed for minimum 4 s, maximum 8 s; bCAL as-
suming 400 ppm CO2 sensor exposure
CAL_in Available when closed for minimum 16 s; CAL assuming 0 ppm
CO2 sensor exposure
Modbus Calibration
Two Modbus calibration types are offered:
• Background Calibration: Requires the sensor to be exposed to fresh air (400 ppm CO2).
• Second Point Calibration: Requires the sensor to be exposed to a certain atmosphere with
a steady CO2 concentration other than 400 ppm, and that this CO2concentration should be
informed via Modbus communication to the sensor.
For more details about the Modbus address and parameters conguration for user calibration,
refer to the Modbus Function Description section.
The CRIR E1 has the following built-in, self-diagnostic functions::
• A full system check that runs automatically every time the power is turned on.
• The sensor probes are checked against failure constantly during operation by checking he valid
dynamic measurement ranges.
• All ash updates, initiated by the sensor itself or by external connections, are checked by
subsequent memory read back and data comparisons.
These system checks return error bytes to the system RAM. The full error codes are available from the
UART port communication. The Out of Range error is reset automatically after the CO2readings return
to the normal measuring range. The Memory error can be reset by power off/on. After the reset of the
Memory error, it is recommended to check the settings stored in the memory to ensure they are the
desired values.
SELF-DIAGNOSTICS
CAL_in Pin Calibration
Two CAL_in Pin calibration types are offered:
• bCAL (background calibration): Requires the sensor to be exposed to fresh air (400 ppm CO2).
• CAL (zero calibration): Requires the sensor cell to be completely immersed in a CO2free
atmosphere.
A switch input is dened for the operator or master system to select one of the two prepared
calibration codes shown in Table 5. It is recommended that the sensor be exposed to the targeted
gas atmosphere for at least 10 minutes to ensure the CO2 concentration inside the sensor chamber is
stable at the targeted value.

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MODBUS REGISTER DEFINITION
Table 6 - Input Registers Denition
IR# # NAME DESCRIPTION
IR1 0- Reserved
IR2 1 - Reserved
IR3 2 - Reserved
IR4 3 - Reserved
IR5 4 Temperature Detector Temperature
IR6 5Meter Status
DI 1 – reserved1
DI 2 – reserved1
DI 3 – reserved1
DI 4 – reserved1
DI 5 – reserved1
DI 6 – Out of Range
DI 7 – Memory error
DI 8 – Reserved1
IR7 6 Output Status DI 1 – Alarm Output status (inverted due to Open Collector)
DI 2 – PWM Output status (1 means full output)
IR8 7 Space CO2Space CO2
IR9 8PWM Output2PWM Output2
IR10 9 Sensor Type ID High3Sensor Type ID High3
IR11 10 Sensor Type ID Low3Sensor Type ID Low3
IR12 11 Memory Map version Memory Map version
IR13 12 FW version Main.Sub4FW version Main.Sub4
IR14 13 Sensor ID High5Sensor ID High5
IR15 14 Sensor ID Low5Sensor ID Low5
IR16 15 Serial Num.1 Serial Num.1, Corresponding to the ASCII red 2-digit code.
Default: ASCII 000-0000-000
IR17 16 Serial Num.2 Serial Num.2, Corresponding to the ASCII red 2-digit code.
Default: ASCII 000-0000-000
IR18 17 Serial Num.3 Serial Num.3, Corresponding to the ASCII red 2-digit code.
Default: ASCII 000-0000-000
IR19 18 Serial Num.4 Serial Num.4, Corresponding to the ASCII red 2-digit code.
Default: ASCII 000-0000-000
IR20 19 Serial Num.5 Serial Num.5, Corresponding to the ASCII red 2-digit code.
Default: ASCII 000-0000-000
IR21 20 - Reserved
IR22 21 - Reserved
IR23 22 - Reserved
IR24 23 - Reserved
IR25 24 - Reserved
IR26 25 - Reserved
IR27 26 - Reserved
IR28 27 - Reserved
IR29 28 - Reserved
IR30 29 - Reserved
IR31 30 - Reserved
IR32 31 - Reserved
1 Reserved DIs returns 0.
2 0x3FFF represents 100% output, i.e. 2000 ppm CO2.
3 IR10 low byte + IR11 contains Sensor Type ID 3-bytes value.
4 IR13 high byte is FW Main revision, low byte – FW Sub revision.
5 IR14 + IR15– 4-bytes sensor’s serial number.

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Table 7 - Holding Registers Denition
IR# # NAME DESCRIPTION
IR1 0- Reserved
IR2 1 - Reserved
IR3 2 - Reserved
IR4 3 - Reserved
IR5 4 ABC Period ABC period in hours1, default: 180 hours
IR6 5 User Acknowledgement Register
CI 1 - CO2 random calibration point has been performed 0X0000
CI 2 - Reserved2
CI 3 - Reserved2
CI 4 - Reserved2
CI 5 - Reserved2
CI 6 - Reserved2
CI 7 - Reserved2
CI 8 - Reserved2
CI 9 - Reserved2
CI 10 - Reserved2
CI 11 - Reserved2
CI 12 - Reserved2
CI 13 - Reserved2
CI 14 - Reserved2
CI 15 - Reserved2
CI 16 - Reserved2
IR7 6 User Special Command Register3Command Parameter
0x7C 0x1 - CO2 random calibration
IR8 7 User Concentration User concentration (default: 400 ppm)
IR9 8- Reserved, returns “illegal data address” exception
IR10 9 - Reserved, returns “illegal data address” exception
IR11 10 - Reserved, returns “illegal data address” exception
IR12 11 Reserved, returns “illegal data address” exception
IR13 12 - Reserved, returns “illegal data address” exception
IR14 13 - Reserved, returns “illegal data address” exception
IR15 14 - Reserved, returns “illegal data address” exception
IR16 15 - Reserved, returns “illegal data address” exception
IR17 16 - Reserved, returns “illegal data address” exception
IR18 17 - Reserved, returns “illegal data address” exception
IR19 18 - Reserved, returns “illegal data address” exception
IR20 19 - Reserved, returns “illegal data address” exception
IR21 20 - Reserved, returns “illegal data address” exception
IR22 21 - Reserved, returns “illegal data address” exception
IR23 22 - Reserved, returns “illegal data address” exception
IR24 23 - Reserved, returns “illegal data address” exception
IR25 24 - Reserved, returns “illegal data address” exception
IR26 25 - Reserved, returns “illegal data address” exception
IR27 26 - Reserved, returns “illegal data address” exception
IR28 27 - Reserved, returns “illegal data address” exception
IR29 28 - Reserved, returns “illegal data address” exception
IR30 29 - Reserved
IR31 30 - Reserved
IR32 31 - Reserved
1 Writing ABC_Period zero value suspends ABC function, but ABC samples and ABC time counting do not lose. To resume ABC function with prior
ABC samples and ABC time, write ABC_Period non-zero values.
2 Reserved CIs returns 0.
3 Special Command Register is write-only.

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MODBUS FUNCTION DESCRIPTION
The serial port conguration is: 9600, 8, 1, N, N. The sensor is addressed as “Any address” (0xFE).
Input Registers Description
Values are read from IR using “Read input registers” (function code 04).
Read Detector Temperature
Master Transmit:
<FE> <04> <00> <04> <00> <01> <64> <04>
Slave Reply:
<FE> <04> <02> <30> <D4> <51> <9A>
Data Explain:
<30> <D4> is valid data 0x30D4, decimal is 12500. After conversion (divided by 100 rst, then subtract 100), it is 25
degrees Celsius. Note that the detector temperature is usually higher than the ambient temperature.
Read Meter Status
Master Transmit:
<FE> <04> <00> <05> <00> <01> <35> <C4>
Slave Reply:
<FE> <04> <02> <01> <60> <AC> <9C>
Data Explain:
<01> <60> is valid data 0x0160, the binary is 0b101100000, the 0th bit of the data bit is DI1, the rst bit of the data bit
is DI2, and so on. The valid bits are as follows:
DI 6 - Out of Range
DI 7 - Memory error
Read Output Status
Master Transmit:
<FE> <04> <00> <06> <00> <01> <C5 > <C4>
Slave Reply:
<FE> <04> <02> <00> <03> <ED> <25>
Data Explain:
<00> <03> is valid data 0x0003, the binary is 0b11. The valid bits are as follows:
DI 1 - Alarm Output status (inverted due to Open Collector)
DI 2 - PWM Output status (1 means full output)
Read Space CO2
Master Transmit:
<FE> <04> <00> <07> <00> <01> <94 > <04>
Slave Reply:
<FE> <04> <02> <01> <90> <AC> <D8>
Data Explain:
<01> <90> is valid data 0x0190, decimal is 400 ppm.
Read PWM Output
Master Transmit:
<FE> <04> <00> <08> <00> <01> <A4 > <07>
Slave Reply:
<FE> <04> <02> <3F> <FF> <FC> <94>
Data Explain:
<3F> <FF> is valid data 0x3FFF, it represents 100% output, i.e. 2000 ppm CO2.

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Read Sensor Type ID
Master Transmit:
<FE> <04> <00> <09> <00> <02> <B5> <C6>
Slave Reply:
<FE> <04> <04> <00> <00> <18> <00> <FE> <8B>
Data Explain:
<00> <00> <18> <00> is valid data 0x00001800, IR09 low byte + IR10 contains Sensor Type ID 3-bytes value, so this
data is 0x001800, it indicates the type of sensor.
Read Memory Map Version
Master Transmit:
<FE> <04> <00> <0B> <00> <01> <54 > <07>
Slave Reply:
<FE> <04> <02> <41> <01> <5C> <B4>
Data Explain:
<41> <01> is valid data 0x4101, it indicates memory map version.
Read FW Version Main and Sub.
Master Transmit:
<FE> <04> <00> <0C> <00> <01> <E5 > <C6>
Slave Reply:
<FE> <04> <02> <01> <00> <AC> <B4>
Data Explain:
<01> <00> is valid data 0x0100, IR13 high byte is FW Main revision, low byte – FW Sub revision. So this version of FW is
1.0
Read Sensor ID
Master Transmit:
<FE> <04> <00> <0D> <00> <02> <F4 > <07>
Slave Reply:
<FE> <04> <04> <11> <03> <30> <33> <55> <A2>
Data Explain:
<11> <03> <30> <33>is valid data 0x11033033, it means sensor ID.
Read Serial Number
Master Transmit:
<FE> <04> <00> <0F> <00> <05> <14 > <05>
Slave Reply:
<FE> <04> <0A> <53> <43> <30> <37> <31> <31> <30><33><30><33><C4><D6>
Data Explain:
<53> <43> <30> <37> <31> <31> <30><33><30><33> is valid data 0x53433037313130333033. After conversion
to ASCII, it is SC07110303.
Holding Registers Description
Values are read and written from IR using “Read holding registers” (function code 03).
Setup ABC Period
Master Transmit:
<FE> <06> <00> <04> <00> <B4> <DC > <73>
Slave Reply:
<FE> <06> <00> <04> <00> <B4> <DC > <73>
Data Explain:
<00> <B4> is valid data 0x00B4, decimal is 180. It means ABC calibration (a program for automatic calibration) is
performed every 180 hours. The value range is (4, 4800) hours and should be an integer multiple of 4. When the value is
0, this function is disabled.

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Read ABC Period
Master Transmit:
<FE> <03> <00> <04> <00> <01> <D1 > <C4>
Slave Reply:
<FE> <03> <02> <00> <B4> <AC> <27>
Data Explain:
<00> <B4> is valid data 0x00B4, decimal is 180 hours.
Setup User Concentration
Master Transmit:
<FE> <06> <00> <07> <01> <90> <2D > <F8>
Slave Reply:
<FE> <06> <00> <07> <01> <90> <2D > <F8>
Data Explain:
<01> <90> is valid data 0x0190, decimal is 400 ppm. It means the user calibration concentration is set to 400 ppm.
<2D> <F8> is CRC and should be calculated based on the user calibration concentration value.
Read User Concentration
Master Transmit:
<FE> <03> <00> <07> <00> <01> <21 > <C4>
Slave Reply:
<FE> <03> <02> <01> <90> <AD> <AC>
Data Explain:
<01> <90> is valid data 0x0190, decimal is 400 ppm.
Setup User Acknowledgement
Master Transmit:
<FE> <06> <00> <05> <00> <00> <8D > <C4>
Slave Reply:
<FE> <06> <00> <05> <00> <00> <8D > <C4>
Data Explain:
<00> <00> is valid data 0x0000, it means to clear the calibration completion ag.
Setup User Special Command
Master Transmit:
<FE> <06> <00> <06> <7C> <01> <9C > <C4>
Slave Reply:
<FE> <06> <00> <06> <7C> <01> <9C > <C4>
Data Explain:
<7C> <01> is valid data 0x7C01, it means to start user calibration.
Read User Acknowledgement
Master Transmit:
<FE> <03> <00> <05> <00> <01> <80> <04>
Slave Reply:
<FE> <03> <02> <00> <01> <AC> <50>
Data Explain:
<00> <01> is valid data 0x0001, it means that the user calibration completion ag has been set to 1, indicating that the
user calibration has been completed.

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Warranty/Remedy
Honeywell warrants goods of its manufacture as being free of defective materials and
faulty workmanship during the applicable warranty period. Honeywell’s standard prod-
uct warranty applies unless agreed to otherwise by Honeywell in writing; please refer
to your order acknowledgment or consult your local sales ofce for specic warranty
details. If warranted goods are returned to Honeywell during the period of coverage,
Honeywell will repair or replace, at its option, without charge those items that Honey-
well, in its sole discretion, nds defective. The foregoing is buyer’s sole remedy and
is in lieu of all other warranties, expressed or implied, including those of merchant-
ability and tness for a particular purpose. In no event shall Honeywell be liable for
consequential, special, or indirect damages.
While Honeywell may provide application assistance personally, through our literature
and the Honeywell web site, it is buyer’s sole responsibility to determine the suitability
of the product in the application.
Specications may change without notice. The information we supply is believed to be
accurate and reliable as of this writing. However, Honeywell assumes no responsibility
for its use.
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency stop devices or in any other ap-
plication where failure of the product could result in personal injury.
Failure to comply with these instructions could result in death or serious injury.

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Contact Details
Solent Gas Consultants Ltd.
07788 548013
[email protected]
www.solentgasconsultants.com
© 2021 Solent Gas Consultants Ltd. 10th May 2021
Richard Chambers
Managing Director
Important Information Regarding the Use of Sensors in Safety Critical Applications
To ensure that the sensor and/or instrument in which it is used, are operating properly,
it is a requirement that the function of the device is conrmed by exposure to target gas
(bump check) before each use of the sensor and/or instrument. Failure to carry out
such tests may jeopardize the safety of people and property.
Supplementary information regarding the storage, handling, integration and calibration
of sensors can be provided on request.
Please Note
While every effort has been made to ensure accuracy in this publication, no
responsibility can be accepted for errors or omissions. Data may change, as well as
legislation, and you are strongly advised to obtain copies of the most recently issued
regulations, standards, and guidelines.
This publication is not intended to form the basis of a contract