The heart of the catalytic sensor consists of a pair of computer matched pellistors (beads) that provide identical electrical resistance in clean air. When flammable gas is present, the active bead catalyzes the combustible gas molecules, while the inactive (reference) bead balances the reaction and compensates for normal changes in the ambient environment. The sophisticated design and construction of Det-Tronics catalytic sensors provides excellent sensitivity, response time, and resistance to physical shock and vibration.
All Det-Tronics catalytic gas sensors are poison-resistant, and are constructed with a one-piece 316 stainless steel housing. Other features include an integral thermal barrier to prevent bead interaction, and a sinter bonding technique to ensure superior protection against electromagnetic interference. All sensors are provided with a laser etched identification and approvals label that will withstand exposure to harsh outdoor industrial environments.
The CGS can be used for detection of virtually all combustible and flammable gases, including hydrogen, and is compatible with the FlexVu ® UD10, Infiniti® U9500, Model 505 transmitter, EQ22xxDCUEX, and STB.
FEATURES AND BENEFITS| SPECIFICATIONS | |
| Temperature Range | Operating: –67°F to +257°F (–55°C to +125°C). Performance: –40°F to +167°F (–40°C to +75°C). |
| Humidity Range | 0 to 99% RH, non-condensing. |
| Response Time | T50, s: <10 T90, s: <30 Verification: FM, CSA, ATEX |
| Recovery Time | < 30 seconds after exposure to pure methane. |
| Accuracy / Linearity | ±3% LFL from 0 to 50% LFL, ±5% LFL from 51% to 100% LFL. |
| Wiring | 2x22 AWG, 1x16 AWG, 600V, 20" |
| Repeatability | ±1% LFL. |
| Long Term Stability | Zero: < 1% LFL per month. Span: < 1% LFL per month in clean air. |
| Temperature Stability | < ±5% LFL: –13°F to +167°F (–25°C to +75°C). < ±10% LFL: –40°F to –13°F (–40°C to –25°C). |
| Sensor Life | 3 to 5 years, when environment is free of substances and conditions known to be detrimental to catalytic sensing elements. |
| Storage Life | Indefinite, when stored in unopened original packaging. |
| Calibration Cycle | 30 days after initial calibration and every 90 days thereafter, or as required by the application and environment. |
| RFI/EMI Immunity | Refer to selected transmitter specification. |
| Dimensions | 1.5in (3.8cm) x 1.7in (4.4cm) x 2.0in (5.2cm) |
| Thread options | • 3/4” NPT • M20 • M25. |
| Certification | FM/CSA: Class I, Div. 1, Groups B, C, & D Tamb = –40°C to +75°C Explosion-proof verified: –40°F to +257°F (–40°C to +125°C) Performance verified: –40°F to +167°F (–40°C to +75°C) Complies with ANSI/ISA-12.13.01-2000. ATEX: CE 0539 II 2 G Ex db IIC T3/T5 DEMKO 02 ATEX 131323X T5 (Tamb = –40°C to +75°C) T3 (Tamb = –55°C to +125°C) IECEx: Ex db IIC T3/T5 IECEx ULD 10.0001X T5 (Tamb = –40°C to +75°C) T3 (Tamb = –55°C to +125°C) EN/IEC Standards: EN/IEC 60079-0: 2012/2011 EN/IEC 60079-1: 2014 EN 60079-29-1: 2007 |
