Sentry Cobra M Instruction manual

Original Instructions
Installation, Operation
&Maintenance Manual
Sentry Cobra M Sampler
Low Emission Samplers
S-MS-IOM-00546-0 09-22

2 Sentry Equipment Corp
Table of Contents
Safety Information ............................................................................................................. 3
General Safety Precautions .............................................................................................. 4
General Description ........................................................................................................... 5
Specications ...................................................................................................................... 5
Installation........................................................................................................................... 6
Maintenance........................................................................................................................ 7
Troubleshooting ................................................................................................................. 8
Parts & Accessories............................................................................................................. 8
Standard Warranty ............................................................................................................. 9
Customer Support.............................................................................................................. 9
Do not install, maintain, or operate this equipment without reading, understanding, and following the
appropriate Sentry Equipment Corp instructions. Otherwise, injury, damage, or both may result.
Copyright
© 2018 by Sentry Equipment Corp. All rights reserved. All product and company names are property of their respective
owners. This document contains proprietary information. No part of this document may be photocopied or reproduced
without the prior written consent of Sentry Equipment Corp.
Limit of Liability
Sentry Equipment Corp, its employees, agents, and the authors and contributors to this document specically disclaim
all liabilities and warranties, express or implied (including warranties of merchantability and tness for a particular
purpose), for the accuracy, currency, completeness, and/or reliability of the information contained herein and/or for the
tness for any particular use and/or for the performance of any material and/or equipment selected in whole or part
with the user of/or in reliance upon information contained herein. Selection of materials and/or equipment is at the
sole risk of the user of this publication.
Note
The information contained in this document is subject to change without notice.

Sentry Cobra M Sampler 3
Safety Information
Please read the entire manual before attempting to unpack, set up, or operate this product. Pay careful attention to all
Warnings, Cautions, and Notes. Failure to do so could result in serious personal injury and/or equipment damage.
Use of Hazard Information
If multiple hazards exist, the signal word corresponding to the greatest hazard shall be used.
Denitions
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION, used with the safety alert symbol, indicates a
hazardous situation which, if not avoided, could result in
minor or moderate injury.
NOTICE is used to address practices not related to personal
injury.
NOTE
Information that requires special emphasis.
TIP
Alternate techniques or clarifying information.
SHALL: This word is understood to be mandatory.
SHOULD: This word is understood to be advisory.

4 Sentry Equipment Corp
General Safety Precautions
Product Selection, Installation, and Use
Improper selection, installation, or use can cause personal injury or property damage. It is solely the responsibility of users,
through their own analysis and testing, to select products suitable for their specic application requirements, ensure they are
properly maintained, and limit their use to their intended purpose.
Follow proper local, state, and federal regulations for proper installation and operational requirements.
Always use caution and common sense when working with any chemical. Read the product label and Material Safety Data
Sheets (MSDS) carefully and follow the instructions exactly.
Potential Equipment Hazards
Hot surfaces! This equipment may have very hot surfaces. If an operator contacts a hot surface, injury may occur. Use
protective clothing to prevent injury. If other equipment comes in contact with a hot surface, damage to the equipment may
occur. Ensure the area around this equipment is kept clear to prevent damage from occurring.
High pressures! This equipment may contain uids at very high pressures. Prior to installing, removing or maintaining this
equipment, ensure that the equipment is isolated from all connecting piping, the equipment is depressurized, the contents
have been drained, and the equipment is cool.
Moving parts! This equipment may contain moving parts. All drive guards and doors must be secured in place when this
machine is being operated.
Equipment rated TX. Equipment maximum surface temperature depends
on operating conditions. Ensure maximum surface temperature shall stay
below ignition temperature of dust or gas atmosphere where it is installed
based on process conditions. Failure to comply could result in an explosion,
causing serious injury or death to personnel and damage to equipment.
If the sampler is mounted directly to a non-electrically conductive surface,
sampler shall be bonded to a grounding electrode. Failure to comply
could result in sparking, which could lead to an explosion, causing harm to
personnel and equipment.
If the sample container is removed from the sampler, do not insert any
body part or other item into the sample discharge port. Crushing will
occur.
To ensure proper sampler operation, be sure
the sampler is installed in a pipe large enough
for the sampler plunger to extend without
impacting the pipe. Failure to comply will
result in equipment damage and poor sample
quality.

Sentry Cobra M Sampler 5
General Description
Read these instructions completely before proceeding to assemble, install or operate this machine. This machine should
be installed, operated and serviced by qualied individuals. Follow proper local, state and federal regulations for proper
installation and operational requirements.
Designed for longevity, the Sentry® Cobra M liquid sampler boasts a variety of unique features that makes it simpler to
install and easier to operate. Made of stainless steel or other exotic materials, the sampler meets the highest standards
of quality and reliability. All of our Cobra M units use the Cobra-designed sampling valve that allows throttling
and control of sample ow. The Cobra needle design provides ample time for air and other gases to be expelled.
Representative samples are assured by following step-by-step procedures printed on the system.
The Cobra M sampler includes a multi-turn handle that permits precise ow control, while a full bore ow path ensures
that no pressure is lost while the sample is being taken. The standard units come with our special coaxial needle
system, the risk of bent or broken needles is reduced dramatically. The Cobra sampling valve has been specically
designed for process sampling, and protects against contamination to ensure the safety of the operator while
maintaining the integrity of every sample taken.
ÂNOTE
Please refer to your job drawings for specic information on your system.
Specications
wetted materials body: stainless steel (other materials available upon request)
Seals: FFKM, PTFE, PEEK (other materials available upon request)
bottle shroud Acetal or stainless steel
process pressure range 0-150 psig (higher pressures available upon request)
process temperature <140°F; cooler required for temps >140°F
sampler interface 1/2 in NPT (1/2 in compression tting available upon request)
vent connection 1/4 in NPT (1/4 in compression tting available upon request)
bottle size 2 oz Boston round
4 oz Boston round
8 oz Boston round
16 oz Boston round
32 oz Boston round
options pipe stand (2 in); enclosure
process isolation valves (inlet and/or return)
secondary isolation valve
needle purge
emissions lter on vent

6 Sentry Equipment Corp
Installation
Dangerous gas! Direct the vent line to a charcoal canister, are, or other subatmospheric region for collection and treatment
of sample vapors. The gases emitted from the vent line may be hazardous and toxic upon exposure.
Mounting
The Sentry Cobra M sampler is equipped with two (2) 2” NPS Pipe Mounting U-Bolts for mounting to a standard 2”NPS
Instrument Pipe Stand. Refer to the accompanying drawing for mounting details.
Piping
Refer to the accompanying drawing for connection sizes, types and locations.
ÂNOTE
Figures in this manual may dier from actual purchased equipment. Please refer to your job drawings for specic connection
information.
PI
1
2
SAMPLE INLET
1
SAMPLE RETURN
V-1
CV-1
SAMPLE
BOTTLE
3
VENT
15" 381
8" 203
VARIES BY
BOTTLE SIZE
COBRA FLOW THRU
SAMPLE VALVE
PRESSURE GAUGE
COBRA NEEDLE
ASSEMBLY
BOTTLE SHROUD
4" 1022 13/16" 71
SAMPLE INLET
SAMPLE RETURN
VENT
FLOW DIAGRAM
G
F
E
C
D
B
A
G
F
E
C
D
B
A
H
1 2 3 4 5 6 7
FILENAME
H
SHEET 1 OF 1
DWG. NO.
DATE
DRAWN
APPD
CKD
REVISION
8
0
Cobra M Drawing and PID
TRO
08/23/22
Cobra M Drawing and PID
DATE DATE
Cobra M
Marketing Drawing
DO NOT SCALE DWG.
REMOVE ALL BURRS AND SHARP
EDGES UNLESS OTHERWISE NOTED
THIS DOCUMENT IS CONFIDENTIAL,
AND CONTAINS INFORMATION
WHICH IS PROPRIETARY TO SEC.
IT IS PROVIDED IN CONFIDENCE
AND UPON THE CONDITION THAT
NEITHER IT NOR THE INFORMATION
CONTAINED IN IT WILL BE COPIED,
DISCLOSED, OR USED IN WHOLE
OR IN PART WITHOUT THE PRIOR
WRITTEN CONSENT OF SEC.
NOTE:
ALL DIMENSIONS IN INCHES
UNLESS OTHERWISE SPECIFIED
TOLERANCES FOR ALL DIMENSIONS
UNLESS OTHERWISE SPECIFIED
MACH. PARTS STRUCT.
1/X
.X
.XX
.XXX
ANG.
1/8
0.1
0.01
0.005
1/2
1/2
0.3
0.06
0.030
1
THIRD ANGLE
PROJECTION
X
7 2 8 5 6 3 4 1
www.sentry-equip.com
Operation
1. Verify sample valve is closed
2. Verify all upstream and downstream valves are open to allow representative sample to be taken
3. Verify vent line is open to allow for safe venting of bottle
4. Insert bottle carefully into shroud and allow Cobra needle to puncture septum
5. Close bottle strap
6. Turn sample valve counter-clockwise to open and verify liquid is owing into bottle
Do not overll bottle

Sentry Cobra M Sampler 7
7. Turn sample valve clockwise to close when 75% of bottle is full
8. When sample valve is closed remove bottle from shroud
9. Place new bottle in shroud
Maintenance
Routine Inspection
The sampler should be checked periodically for proper operation and to ensure that any wear is detected for
preventive maintenance. A denite schedule of inspection should be established to ensure safe and accurate sampling
operation. Such inspection should include:
checking ttings for leaks
checking for signs of corrosion
performing a sample to ensure moving parts remain operable (this is particularly important in cases where the
station is not used frequently)
Needle Valve
Any blockages normally can be cleared by fully opening the valve. Care must be taken to ensure that temperature and
pressure limits are not exceeded during this process.
Valve Packing
Occasionally during initial startup or restart of the sample panel, the low pressure/high pressure inlet isolation valve
packing may leak. If this occurs, tighten the packing nut. If the packing continues to leak or other valves or o-rings
require maintenance, please see the Parts & Accessories list in this manual.
Sample Cooler
For installation and operating instructions for the sample cooler, please see the Installation, Operation & Maintenance
manual for Sentry sample coolers.
Carbon Canister
An optional Sentry carbon canister is available. The carbon canister assembly is designed to absorb hydrocarbon gases
vented from Sentry manual low-emission samplers.
The gas vent of the sampler panel is connected to the inlet of the carbon canister assembly. The gases then pass
through a volume of activated carbon, where hydrocarbons, such as benzene, are absorbed. Often, there are specic
gases, such as H2S – hydrogen sulde – that also are carried in the vented gas. To remove these, specially designed
products such as impregnated activated carbon are used. In these instances, the carbon canister assembly is lled with
impregnated activated carbon.
Both activated carbon and impregnated activated carbon have a nite ability to remove hydrocarbons and other
gases. The life of the product is dependent on concentrations and volumetric ow of the gas. An optional “tell tale”
assembly can be provided with the carbon canister assembly to provide a visual indication of when the carbon
canister assembly requires recharging. The carbon canister assembly is designed for easy recharging. Instructions are
below.

8 Sentry Equipment Corp
Troubleshooting
symptom possible problem(s) remedy
Elevated sample
temperature
(For cooler option)
Loss of cooling water ow
Increase in cooling water inlet
temperature
Scaled cooler
Increased sample ow
Check cooling water supply
Reduce cooling water temperature or
increase ow
Chemically clean (see cooler maintenance)
Adjust sample ow rate
Reduced sample ow Plugged line
Blow down line and exercise ow control
valve
Inspect and/or replace needle assembly
Leaking valve stems Loose or worn packing Tighten packing nut or replace packing
Leaking cooler
(For cooler option)
Loose housing from thermal shock
or worn gasket
Tighten bolts on head assembly or replace
gasket if cut or worn
Parts & Accessories
The following parts are recommended spares for the Sentry Cobra M sampler. Please consult the accompanying job-
specic drawings for exact part numbers and descriptions.
Flow-through sample valve
Isolation valve
Check valve

Sentry Cobra M Sampler 9
Standard Warranty
Sentry Equipment Corp (“Seller”) warrants products manufactured by it and supplied hereunder (“Products”) to be free
from defects in workmanship and, to the extent materials are selected by Seller, to be free from defects in materials, in
each case for a period as dened in the table below:
Product Line Product Category Warranty Period
Sentry® 1. Automatic Sampling
2. Corrosion Monitoring
3. Manual Sampling
4. Sample Conditioning
5. Sampling & Analysis Systems
6. Replacement Parts (without expiration dates)
Eighteen months from date of shipment
or twelve months from startup, whichever
occurs rst
Waters Equipment 1. Sampling & Analysis Systems
2. Replacement Parts (without expiration dates)
Twelve months from date of shipment
To view the full warranty, go to
www.sentry-equip.com/warranty.
Customer Support
With proven sampling expertise since 1924, Sentry products and services provide business operations the critical
insights to optimize process control and product quality. We deliver true representative sampling and analysis
techniques to customers around the globe, empowering them to accurately monitor and measure processes for
improved production eciency, output, and safety. Standing behind our commitments, we are determined to tackle
any application, anywhere.
We know that running an ecient operation isn’t easy. It requires thorough, careful analysis of controlled, real-
time data achieved through reliable, accurate, and repeatable process monitoring, and measuring. By eectively
conditioning, sampling, and measuring gas, liquid, slurry, powder, solids, steam, or water within their production
environments, our customers obtain the critical insights they need to control and optimize their processes.
Yet, controlling your processes also means reliable customer support throughout the life cycle of your equipment.

Customer Service—General information, warranty claims, order management.

Installation Service—For systems that require specialized expertise upon installation.

Technical Support—Troubleshooting, training, and technical manuals.

Field Service & Retrots—When a problem needs immediate attention.

Replacements Parts & Consumables—Order your replacement parts and consumables.
Sentry ProShield Services – select from four ProShield Guardian service plans providing dierent levels of support to
protect your large system investments with regularly scheduled maintenance.
To learn more, go to
www.sentry-equip.com/support.

10 Sentry Equipment Corp
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Sentry Cobra M Sampler 11
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sentry-equip.com
966 Blue Ribbon Circle North, Oconomowoc,WI 53066 U.S.A. | [phone] | [e-mail]
Serving customers
in more than 50 countries
across six continents worldwide.