- Brand: Michell Instruments
Tags: Fixed, Ambient, Oxygen, Deficiency, Monitors, with, Alarms, Michell, Instruments
Fixed Ambient Oxygen Deficiency Monitors with Alarms
GPR-35, GPR-2500 SN (ATEX), GPR-2800 IS
The GPR-1800 series of intrinsically safe trace oxygen analyzers are designed for use in demanding process environments where the low detection limit down the AII’s industrial oxygen sensors can be well utilized. Typical for Analytical Industries gas analyzers, they are simple to use as well as easy and cost-effective to maintain thanks to the use of their maintenance-free galvanic oxygen sensors. The innovative liquid drain manifold, which is available as an option, protects and extends the sensor's life span in processes where liquids may be present in the sample gas.
Product Features
- Low maintenance with typically 32 months oxygen sensor life
- Audible and visual oxygen deficiency alarm available
- Up to four measurement ranges
- Accuracy of <2% of span
- Mains power with battery back-up (GPR-35)
- Remote oxygen sensor & pump options (GPR-35)
- Analog output for connection to DCS
- 12-28 V DC operation (GPR-2500 versions)
Technical Specifications
| GPR-35 | GPR-2500-S | GPR-2800-IS/AIS-S | ||
| Measurement Range | 0-25% | 0-25% | 0-25% | |
| Accuracy | < 2% of range at constant conditions | |||
| Response time | T90 < 10 seconds | |||
| Sensitivity (LDL) | 0.1% O2 | |||
| Linearity (LDL) | < 1% of scale | |||
| Sensor model | GPR-11-32-RTS | GPR-11-32-4 XLT-11-24-4 for gases containing >0.5% CO2 |
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| Sensor life at 25ºC (77°F) and 1 atm | 32 months in air | GPR-11-32-4 32 months in air 5°C and 1 atm XLT-11-24-4 24 months in air 5°C and 1 atm |
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| Calibration interval | 30 days | |||
| Inlet pressure | Atmospheric sampling | |||
| Gas connections | None | |||
| Display | 3½ digit LCD; resolution 0.1 | LCD 7 x 3.5cm (2.75 x 1.375"); resolution 0.1% | ||
| Enclosure | Painted aluminum, suitable for indoor use only | Fiberglass NEMA 4X | Fiberglass NEMA 4X, plus painted aluminum Exd enclosure |
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| Dimensions | 10.1 x 22.8 x 7.6cm (4x9x3") | 17.1 x 21.3 x 10.8cm (6.75 x 8.375 x 4.25") | 25.3 x 40cm (10 x 15.7") | |
| Weight | 3.6kg (8lbs) | 6.5kg (14.6 lbs) | ||
| Compensation | Barometric pressure and temperature (GPR-35 and GPR-2800 AIS S) Temperature (GPR-2500 and GPR-2800 IS S) |
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| Signal output | 0-1V | 4-20 mA (or 1-5V on GPR-2800 AIS) | ||
| Alarms | Two adjustable SPDT Form C non-latching relay contacts | None | Two user-configurable alarms magnetic coil relays rated 3A at 100 V AC (AIS only) |
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| Operating temperature | G0°C to 45°C (32°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) |
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| Humidity | Non-condensing up to 95% RH | |||
| Power | 100-240 V AC with battery back-up (battery life up to 30 days or 8 hours in alarm mode) | 18-28 V DC | 18-24 V DC (IS model) 18-24 V DC or 110 to 220 V AC (ATEX AIS only) |
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| Area classification | General purpose CSA/NRTL approved | General purpose or with external safety barrier MTL-7706 or equivalent ATEX: II 2 G Ex ia IIB T4 Gb Tamb -20°C to +50°C |
ATEX: II 2 G Ex d [ib] ib IIB Gb T4 Tamb -20°C to +45°C |
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