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 vapor. 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
(800) 777-7334
2 Hanbury Rd
Chelmsford, Essex, CM1 3 AE
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| 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 vapor. 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 |
