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Oxygen Analyzers for Petrochemical - AII GPR-18/28

Updated:2025-03-13

Brand: PST/AII
Model: GPR-18/28
Description: Explosion-proof oxygen analyzers are designed for petrochemical industries processes containing hydrogen and other flammable gases. These trace and percentage oxygen analyzers are supplied in rugged E
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Product Details

Oxygen Analyzers for Petrochemical - AII GPR-18/28 Description：

User’s Manual Datasheet

Explosion Proof O2 Solutions for Peterochemical Applications

Features

Galvanic electrochemical oxygen sensor technology

4 standard measurement ranges

Accuracy ±2% of selected range

Sensitivity < 0.5% of range

Long O2 sensor life 24 to 36 months for low maintenance

No need for frequent electrolyte top-up

Field-proven superior electrochemical sensor stability

Flame arrestors fitted (standard)

Explosion-proof oxygen analyzers are designed for petrochemical industries processes containing hydrogen and other flammable gases. These trace and percentage oxygen analyzers are supplied in rugged Exd enclosures with flame arrestors and suitable for hazardous areas. The oxygen sensitivity of the field-proven electrochemical sensor allows oxygen measurement ranges from as low as 0-1 ppm up to 0-25% O2.

Specifications

	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	3? digit bright red LED; resolution 0.01 ppm GPR-18, 0.001 PPM GPR-18MS2, 0.001% GPR-28	3? digit bright red LED; resolution 0.01 ppm GPR-18, 0.001 PPM GPR-18MS2, 0.001% GPR-29	3? 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