| | GPR-18 MS-2 | GPR-18 | GPR-28 |
| Measurement range | 0-1 ppm, 0-10, 0-100 ppm & 0-1000 ppm | 0-10 ppm, 0-100, 0-1000 ppm & 0-1%
(0-25% for calibration only) | 0-1%, 0-5%, 0-10% & 0-25% |
| Accuracy | < 2% of range | < 2% of range | < 2% of range |
| Response Time | T90 < 20 seconds | T90 < 10 seconds | T90 < 10 seconds |
| Recovery Time | O2 Level: Air
Duration: 30 Sec
O2 Target: 10 ppm
Recovery on N2: 45 minutes*
O2 Level: 9 ppm
Duration: 2 minutes
O2 Target: 0.1 ppm | O2 Level: Air
Duration: 2 minutes
O2 Target: 10 ppm
Recovery on N2: 60 minutes*
O2 Level: Air
Duration: 2 minutes
O2 Target: 1 ppm
Recovery on N2: 20 minutes** | O2 Level: Air
Duration: 30 sec
O2 Target: 0.1%
Recovery on N2: 30 seconds |
| | * Installation | * Installation
** In service for 2 weeks at 0.1 ppm | |
| Sensitivity (LDL) | < 0.5% of range | < 0.5% of range | < 0.5% of range |
| Linearity | < 1% of scale | < 1% of scale | < 1% of scale |
| Sensor model | GPR-12-2000MS | GPR-12-333
XLT-12-333 (> 0.5% CO2 present) | GPR-11-32
XLT-11-24 (> 0.5% CO2 present) |
| Sensor life at 25ºC (77°F) and 1 atm | 36 months; average O2 < 100 ppm | 24 months; average O2 < 100 ppm | GPR-11-32 32 months in air;
XLT-11-24 24 months in air |
| Calibration interval | 1-3 months | 1-3 months | 1-3 months |
| Inlet pressure | 0.34-2 barg (5-30 psig), max 100 psig; with atmospheric vent | 0.34-2 barg (5-30 psig), max 100 psig; with atmospheric vent | 0.34-2 barg (5-30 psig), max 100 psig; with atmospheric vent |
| Flow rate | 0.5-1.0 l/m (1-2 SCFH) | 0.5-1.0 l/m (1-2 SCFH) | 0.5-1.0 l/m (1-2 SCFH) |
| Gas connections | 1/8" or 1/4" compression tube fittings | 1/8" or 1/4" compression tube fittings | 1/8" or 1/4" compression tube fittings |
| Wetted parts | Stainless steel | Stainless steel | Stainless steel |
| Display | 3½ digit bright red LED; resolution 0.01 ppm GPR-18, 0.001 PPM GPR-18MS2, 0.001% GPR-28 | 3½ digit bright red LED; resolution 0.01 ppm GPR-18, 0.001 PPM GPR-18MS2, 0.001% GPR-29 | 3½ digit bright red LED; resolution 0.01 ppm GPR-18, 0.001 PPM GPR-18MS2, 0.001% GPR-30 |
| Enclosure - UL | Aluminum 30.4 x 29.2 x 26.7cm (12 x 11.5 x 10.5”) wall mount, 22.7kg (50lbs) | Aluminum 30.4 x 29.2 x 26.7cm (12 x 11.5 x 10.5”) wall mount, 22.7kg (50lbs) | Aluminum 30.4 x 29.2 x 26.7cm (12 x 11.5 x 10.5”) wall mount, 22.7kg (50lbs) |
| Enclosure - ATEX | Aluminum 40.6 x 45.7 x 27.9cm (16 x 18 x 11”) wall mount, 31.8kg (70lbs) | Aluminum 40.6 x 45.7 x 27.9cm (16 x 18 x 11”) wall mount, 31.8kg (70lbs) | Aluminum 40.6 x 45.7 x 27.9cm (16 x 18 x 11”) wall mount, 31.8kg (70lbs) |
| Compensation | Temperature | Temperature | Temperature |
| Signal output | 4-20 mA isolated and 0-1V | 4-20 mA isolated and 0-1V | 4-20 mA isolated and 0-1V |
| Alarms | 2 adjustable form C relay contacts non-latching; sensor and power failure | 3 adjustable form C relay contacts non-latching; sensor and power failure | 4 adjustable form C relay contacts non-latching; sensor and power failure |
| Operating temperature | 5°C to 45°C (41°F to 113°F) | GPR Sensor: 5°C to 45°C (41°F to 113°F)
XLT Sensor: -10° to 45°C (14°F to 113°F) | GPR Sensor: 5°C to 45°C (41°F to 113°F)
XLT Sensor: -10° to 45°C (14°F to 113°F) |
| Power | 100/120 or 220/240 V AC | 100/120 or 220/240 V AC | 100/120 or 220/240 V AC |
| Certifications | Conforms to UL: Class 1, Division 1, Groups B, C, D NEMA4/7 hazardous areas (enclosures only) ATEX: EExd d IIB+H2 T6 | Conforms to UL: Class 1, Division 1, Groups B, C, D NEMA4/7 hazardous areas (enclosures only) ATEX: EExd d IIB+H2 T6 | Conforms to UL: Class 1, Division 1, Groups B, C, D NEMA4/7 hazardous areas (enclosures only) ATEX: EExd d IIB+H2 T6 |
