Pellistor Catalytic Sensors

The sensor is designed for use with a Wheatstone Bridge circuit so that a difference signal may be obtained. Pellistors are miniature calorimeters used to measure the energy liberated by the burning of a combustible (flammable) gas or vapour. A platinum coil is housed inside a refractory bead which has a layer of catalytic material. The wire is at a temperature where a gas molecule will be burned when it contacts the catalyst layer. This burning generates heat which increases the resistance of the coil.

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Availability: Commercially Available

(800) 777-7334
2 Hanbury Rd
Chelmsford, Essex, CM1 3 AE
Manufacturer
SGX Sensortech (IS) Ltd
Product Name
Pellistor Catalytic Sensors
Detection Category
Chemical
Detection Principle
Sensors;
Detection Method
Catalytic Bead Sensor; Pellistor;
Application
Gas Analysis;
Equipment Type
Sensor
Product Synopsis
The sensor is designed for use with a Wheatstone Bridge circuit so that a difference signal may be obtained. Pellistors are miniature calorimeters used to measure the energy liberated by the burning of a combustible (flammable) gas or vapour. A platinum coil is housed inside a refractory bead which has a layer of catalytic material. The wire is at a temperature where a gas molecule will be burned when it contacts the catalyst layer. This burning generates heat which increases the resistance of the coil.
Availability
Commercially Available
Technology Readiness Level (TRL)
9
User Feedback Sources
Indifferent/No user feedback
Dimensions
0.79 x 0.87 in (20 x 22 mm)
Weight
<1 lb.; 0.18 oz (5 g)
Power Requirements
AC/Dc Line Power; 2V, 2.5V, 3V, or 4.25 V - requirements vary between sensors Gas Sensor Evaluation Kit uses input voltage of 90 - 264 V AC.
Transportability
Pocket Size
Ruggedness
None
Operating Conditions
Ambient temperatures must be between -40 and 55°C, 0 – 80% RH, Gas sensor evaluation kit requires: 0°C to 40°C temperature range
Calibration Schedule
3 month, when using gas sensor evaluation kit and depending on environmental conditions. Bump testing is recommended before each use
Available Accessories
$350 for Evaluation Kit
Data Analysis Support Equipment
Computer with Pentium IV and Windows software; SGX data logging and control software for use on a PC containing Windows XP, Vista, or Windows 7
Communications Interface
Yes
Unit Cost
$56.48
Tested For ITF-25 TIC/TIMs
Ammonia
Other Chemical Targets
Measures: Hydrogen sulfide, methane, combustible gas, ammonia and combustible gas
Sample Introduction
Vapor/Gas
Sensitivity/Detection Limits
%LEL
Known Interferents/Inhibitors
H2S, CFCs etc.), where loss of sensitivity is less pronounced and can be reversible. Organic silicones may cause a total loss of sensitivity
Response Time (Sample Application To Output)
Continuous (<30 seconds); Up to 10 seconds, but varies depending on the sensor
Alarm Capability
4 configurable alarm outputs when used with the gas sensor evaluation kit
Software Control
PC
Training Required
>1 week training
Manuals Available
Yes
Warranties
Yes
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