Analytical Industries Portable Oxygen Analyzers

Analytical Industries Portable Oxygen Analyzers

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Analytical Industries Portable Oxygen Analyzers is suitable for trace oxygen measurements from 0.1 ppm through to purity applications at 100% oxygen. These rugged portable instruments share the same advanced sensor technology as the online process oxygen analyzers ensuring confidence in their reliability and accuracy.

The Analytical Instruments concept of using the same HMI and menu structures for portable and online analyzers makes it extremely easy for operators to use both types of instruments on their site without need for extra training.

GPR-1100 (ATEX)

The GPR-1100 model is an industry standard portable analyzer for trace oxygen measurements down to 0.1 ppm. Supplied with stainless steel wetted materials, the instrument is also equipped with quick connect fittings to trap the sample in the analyzer and extend the oxygen sensor service life by avoiding air diffusing into the sensor.

Options: XLT sensor for CO2 backgrounds
Ranges Available: 0-10, 0-100, 0-1,000ppm & 0-1% (0- 25% for calibration only)

GPR-1000 (ATEX)

Optimised for measuring oxygen below 1,000ppm with an LDL of 5ppm and is temperature compensated. The GPR-1000 oxygen meter can also be operated up to 1% range. It is supplied with brass fittings.
Options: XLT sensor for CO2 backgrounds, stainless steel fittings, weld purge kit.
Ranges Available: 0-1,000ppm & 0-1% (0-25% for calibration only)

GPR-2000 (ATEX)

The GPR-2000 portable instrument is designed for percentage level oxygen measurements with an LDL of 0.005% (50ppm) O2. This versatile oxygen analyzer will be suitable for many applications. It is supplied with barometric pressure and temperature compensation as well as stainless steel fittings and internal pipework.
Options: XLT sensor for CO2 backgrounds
Ranges Available: 0-1%, 0-5%, 0-10% & 0-25%

GPR-3500 MO

The GPR-3500 instrument has been developed for measuring 0-100% oxygen in general purpose areas.

This portable oxygen analyzer features barometric pressure and temperature compensation and is supplied with stainless steel wetted parts, a flowmeter and needle valve. The LDL is 0.5% O2 (the LDL can be further enhanced with a zero calibration).

This unit also displays the ambient temperature and pressure. For oxygen purity measurements a span gas with the desired target concentration should be used.
Range Available: 0-100% O2


  • Rugged- made to last in field operation
  • Easy to use
  • Up to 30 days battery life (40 hours with pump)
  • Measurement ranges from 0-10 ppm up to 0-100% O2
  • 24 to 32 months sensor life span (in normal use)
  • Lightweight – 2.5Kgs
  • Internal pump option
  • 0-1V output
  • XLT sensor options for CO2 backgrounds


Spot checking for :

  • Oxygen and nitrogen generators
  • Storage holds on marine vessels post maintenance
  • Oxygen in tankers during delivery
  • Metal treatment processes
  • Leak checking processes
  • Double glazing manufacture
  • Welding (under N2 or Ar purge)


GPR-1100 GPR-1000 GPR-2000 GPR-3500 MO
Measurement range 0-10, 0-100, 0-1000 ppm, 0-1%, 0-25% 0-1000 ppm, 0-1%, 0-25% 0-1%, 0-5%, 0-10%, 0-25% 0-100%
Accuracy < 2% of selected range at constant conditions
Response time T90 < 10 seconds T90 < 13 seconds
Recovery time 60 sec in air to < 10 ppm in < 1 hour on N2 purge 60 sec in air to < 100 ppm in < 15 min on N2 purge NA
Sensitivity (LDL) 0.05 ppm 5 ppm 0.005% 0.1%
Linearity < 1% of scale
Sensor model GPR-12-333 GPR-12-100-M GPR-11-32-RTS GPR-11-120-RTS
XLT-12-333 for gas mixture with > 0.5% CO2 XLT-12-100-M for gas mixture with > 0.5% CO2 XLT-11-24-RTS for gas mixture with > 0.5% CO2
Sensor life at 25ºC (77°F) and 1 atm 24 months in < 1000 ppm O2 GPR-11-32-RTS 32 months in air 24 months in 100% O2
XLT-11-24-RTS 24 months in air
Calibration interval 30 days
Inlet pressure 0.34 – 2 barg (5-30 psig) with atmospheric vent
Flow rate 0.5-1.0 l/m (1-2 SCFH)
Gas connections 1/8″ NPT male quick connect 1/8″ NPT quick connect 1/8″ compression tube fittings 1/4″ compression tube fittings
Wetted parts Stainless steel Brass connections; stainless steel optional GP version: Brass, plastic Stainless steel
ATEX version: Stainless steel flow housing, tubing and fittings
Display Graphical LCD 7 x 3.5cm (2.75 x 1.375″)
Resolution 0.01ppm 1ppm 0.001% 0.1%
Enclosure Painted aluminum NEMA 4X,
10.1 x 22.9 x 7.6cm (4 x 9 x 3″)
3.64kg (8lbs)
Compensation Barometric pressure and temperature
Signal output 0-1V
LED indicators LOW BATT (72 hr. warning); CHARGE mode
Operating temperature 5°C to 45°C (41°F to 113°F) (GPR sensor), 5°C to 45°C (41°F to 113°F)
-10° to 45°C (14°F to 113°F) (XLT sensor)
Power Rechargeable battery (lead acid)
Battery life Up to 30 days on a single charge (40 hours with pump running) Up to 30 days on a single charge
Area classification ATEX: Ex II 2 G General purpose only
Ex ib IIC T4 Gb
Tamb: 5°C to +45°C

Download Datasheet : Analytical Industries Portable Oxygen Analyzers

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