Analytical Industries Ambient Monitor is reliable oxygen deficiency monitors for measuring the oxygen concentration in rooms where there is potential for gas leaks to prevent oxygen depletion or asphyxiation and ensure safety of personnel.
Analytical Industries Ambient Monitor 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)
Applications
- Cylinder storage areas
- Rooms with gas lines
- Rooms with purged processes or vessels
- Large chambers that are purged with inert or other gases
- Confined spaces
AII GPR-35
The GPR-35 is specifically designed for ambient monitoring and has an accuracy of better than 2% of reading under constant conditions. This model offers barometric pressure and temperature compensation, is mains powered with a battery back-up that will last up to 8 hours in alarm mode. It is supplied with dual red/ green alarm indicators, low battery and failure LEDs and a 0-1V output. Other features include two adjustable alarms for oxygen concentration and these are pre-set to OHSA levels of 20.0% (caution) and 19.5% (danger).
AII GPR-2500 SN (ATEX)
For measuring ambient air in general purpose or hazardous area, the GPR-2500 SN is ideal, it is 18- 24V loop powered with ranges of 0-1%, 0-5%, 0-10% & 0-25% O2. The unit is a basic 24V loop powered transmitter with the sensor located at the bottom of the NEMA box and open to the atmosphere. When used in a hazardous area an external barrier (MTL7706+ or equivalent) is required. The XLT sensor is available with this model.
AII GPR-2800 IS S
For measuring ambient air in a hazardous area, the GPR2800 is ideal, with a single range of 0-25% O2. The unit is a basic 24V loop powered transmitter with the sensor located at the bottom of the NEMA box and open to the atmosphere. The XLT sensor is available with this model.AII GPR-2800 AIS S
The AIS model adds alarms and the ability to be mains powered as well as the option of MODBUS (24V DC only) providing greater flexibility.
Analytical Industries Ambient Monitor 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 | < 1% of scale | ||
| Sensor model | GPR-11-32-RTS | GPR-11-32-4 XLT-11-24-4 for gases containing >0.5% CO2 | |
| 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 | |
| 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 |
| 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) | ||
| 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) |
| Operating temperature | 0°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) | |
| 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) |
| 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 |
Download Datasheet: Analytical Industries Fixed Ambient Oxygen Deficiency Monitors with AlarmsReference: aii1.com
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