PrevEx® Heated Flammability Analyzer
PrevEx® Heated Flammability Analyzer
SKU:PRE-dd7178
Enhanced Flammability Analyzer for LFL/LEL monitoring in hazardous environments. Accurate, reliable, and compliant with FM standards.
Regular price
$4,999.00
Regular price
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$4,999.00
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PrevEx® Heated Flammability Analyzer
$4,999.00
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PrevEx® Heated Flammability Analyzer
$4,999.00
Quantity: 1
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The PrevEx® Heated Flammability Analyzer is an industrial-grade solution designed for precise lower flammability limit (LFL/LEL) monitoring in hazardous environments. With a sensor heated operating temperature of 0 to 60°C, this analyzer offers unparalleled accuracy (+/- 3%) and reliability. Its failsafe operation and extensive output options, including relays and analog/digital outputs, ensure continuous monitoring and timely warnings. The heated sampling system prevents condensation issues, making it ideal for a wide range of applications. Compliant with FM standards and featuring explosion-proof construction, this analyzer is a trusted choice for industrial safety and regulatory compliance.
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Product Specifications
Analyzer Design Analyzer Design
The Model SNR701 is an industrial strength assembly consisting of a heated flame cell and an integrated controller that continuously measures total flammable vapor concentrations from 0 to 100 % of the Lower Flammable Limit (LFL) range. Optional modifications allow the SNR701 to sample low oxygen and inert atmospheres.Control Instruments' proprietary flame temperature technology assures an accurate and linear response. A carefully metered pilot flame incinerates the sample; the resulting change in flame characteristics is proportional to the total concentration of flammable vapors present.
Assembly Dimensions Depth
8.5 in
Assembly Dimensions Height
16 in
Assembly Dimensions Width
12.1 in
Failsafe Operation Failsafe Operation
A fault relay de-energizes whenever any of the following occur: controller electrical failure; loss of system power; loss of heat; loss of flow through the flame cell; and downscale readings caused by loss of flame or fuel.
Fuel Consumption Hydrogen Consumption Optional
58 L/d | 40 to 45 psig
Fuel Consumption Propane Consumption
30 to 35 psig | 1 lb/month
Fuel Requirements Prepurified Hydrogen Optional
99.99 %
Fuel Requirements Propane Chemically Pure Cp Grade
99 %
Heated Sampling System Heated Sampling System
To avoid condensation during sampling, the entire analyzer pneumatic assembly is heated to 60 ºC (140 ºF). This eliminates both inaccurate readings caused by solvent dropout as well as excessive maintenance time due to sample condensation and clogging.It is suitable for monitoring many common solvent vapors. The analyzer is unaffected by the temperature of the process and can sample streams above 1500 ºF.The assembly mounts directly onto the process ductwork, as close as possible to the sample pickup point. This eliminates external heated sample lines and allows the fastest response time. An optional modification allows the assembly to mount to the wall with side access to sample and exhaust ports (limited by application).The analyzer employs customer-supplied compressed air to drive its integrated air-aspirated sampling system. This method is simple, has no moving parts and requires very little maintenance. The sampling system does not require bottled air or sample pumps. Autocalibration solenoids, which allow remote activation of calibration tests, are standard.
Note Note
As a result of our commitment to product improvement, specifications are subject to change without notice. All Rights Reserved.
Outputs Outputs
The system includes six relays: single-pole, double throw relays for Warning, Danger, Fault; and single-pole, single-throw relays for Horn, Calibration-in-Progress and Service Needed. Other standard outputs include a 4-20 mA analog output and an RS-485 serial port with Modbus protocol. Digital remote access and control is made possible with optional operator interface panels.
Performance Performance
Detector response time is less than 1 second. The analyzer exhibits a very stable zero: less than one percent drift in thirty days. Calibration accuracy has less than five percent error per year.
Specifications Accuracy
± 3 % of full scale reading or 10 % of applied gas whichever is greater
Specifications Air Consumption
64 scfh | 32 Liters/Minute Including Purge
Specifications Alarm Function
Adjustable Alarm Ranges
Specifications Alternating Current Ac Voltage
120 V
Specifications Analog Output Current
4 to 20 mA
Specifications Approvals
FM (Standard), FMc (Optional)
Specifications Approvals Pending
CE, ATEX, IECEx, UKEX (Optional)
Specifications Cell Response Time
< 1 sec
Specifications Digital Output
Modbus Protocol | RS-485 Serial
Specifications Enclosure Rating
Type 12/13, Indoor
Specifications Flame Cell Material
Hard-Coat Aluminum
Specifications Flame Cell Rating
Explosion Proof Class I, Division 1
Specifications Frequency
50 Hz | 60 Hz
Specifications Hazardous Area Rating
Class I, Division 2, Groups A, B, C, D
Specifications Lower Flammable Limit Lfl Calibration
0 to 100 %
Specifications Maximum Analog Output Impedance Includes Line Len
275 Ω
Specifications Maximum Power
400 W
Specifications Optional Alternating Current Ac Voltage
230 V
Specifications Oxygen
0 to 21% O2 in sample (H2 fuel, optional) | 12 to 21% O2 in sample (hydrogen fuel) | 18 to 21% O2 in sample (propane fuel)
Specifications Regulated Clean And Dry Compressed Air
20 psig
Specifications Relative Humidity Range
0 to 100 %
Specifications Relays
Four Form A redundant safety relays | Two Form A SPST realys
Specifications Relay Functions
Six relays for: Warning; Danger; Fault; Air/Fuel; Calibration-in-Progress and Service Needed
Specifications Repeatability
Within 1 % of measurement range
Specifications Sample Train Material
Brass | Hard-Coat Aluminum | Stainless Steel (Optional)
Specifications Voltage Tolerance
-15 % | +10 %