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GMI Gasurveyor 526 Monitor c/w Alkaline Batteries
  • GMI Gasurveyor 526 Monitor c/w Alkaline Batteries
  • GMI Gasurveyor 526 Monitor c/w Alkaline Batteries
  • GMI Gasurveyor 526 Monitor
  • GMI Gasurveyor 526 Monitor

GMI Gasurveyor 500 Series

GMI Approved distributor

lead time Lead Time Approx. 14-28 Days.

Includes: Harness, 4mm Hex Driver, User Handbook, 1.5m Clear Sample Line, Carrying Case, Standard Probe, Probe Handle Assembly, Sample Line Adaptor, 2 Packs of Cotton Filters.

Select Option
The Gasurveyor 500 is a highly flexible, portable gas detector which can be configured from a simple single gas instrument, through to a sophisticated four gas multi-tasking instrument. The instrument is designed to the latest standards and is certified for use in Hazardous Areas.

The Gasurveyor 500 can contain up to six gas ranges with the following ranges being possible:

LEL, 0 to 100%,
Volume gas, 0 to 100%
PPM Flammable
Oxygen, 0 to 25%
Toxic range 1
Toxic range 2

Ranges of Operation

LEL, 0 to 100%
The LEL range indicates the explosibility of the flammable gas in the sample. This is displayed as a percentage of the lower explosive limit (LEL) of the gas.

Any combination of flammable gas from parts per million (ppm) through Lower Explosive Limit (LEL) to percent volume, oxygen, carbon monoxide and hydrogen sulphide can be selected to ensure that your exact requirements are met. All of the Gasurveyor 500 Series are dual mode instruments, making them suitable for both surveying work and confined space.

Toxic Ranges
Two toxic ranges are possible on the Gasurveyor 500 series of instruments. The toxic ranges measure on the ppm scale. The toxic sensors are subject to the effect of pressure transients and should be operated at normal atmospheric pressure conditions. The sensors have a normal operating life of two years.

The Gasurveyor 500 series memory can store up to 1000 logged entries which are dependent on number of Gas ranges and duration of each ON/OFF session. The memory will overwrite entries in the event of an overflow.

Operating Modes
The Gasurveyor 500 is a dual configuration instrument. It operates as a Confined Space Monitor (CSM) or as a Combustible Gas Indicator (CGI) depending on the button used to switch it on.

Confined Space Monitor (CSM)


In this mode the instrument operates as a safety monitor for use when entering confined spaces which may contain hazardous gas mixtures (flammable, toxic and/or asphyxiant). The instrument samples the ambient atmosphere to which the operator is exposed and generates alarms for low oxygen, high oxygen, high flammable gas, high toxic gas, Short Term TWA (STEL) and Long Term TWA (LTEL).

Combustible Gas Indicator (CGI)


In this mode the instrument operates as a gas indicator drawing a sample via a probe from points where gas is suspected to be present. Alarms, by default, are disabled in CGI mode, as the instrument is generally used for measuring gas levels rather than monitoring for the presence of gas.


Measures flammable, oxygen and toxic gases.
Dual mode operation - Combustible Gas Indicator (CGI) / Confined Space Monitor (CSM).
Rechargeable or alkaline battery options.
Approved to European and North American safety standards.
Extremely robust anti-static case.
Simple to use.
Built-in sampling pump as standard.
Large LCD with automatic backlighting in low level light conditions.
Compatible with the GMI range of Auto Calibration Systems.
Audible / visual alarms for all gas ranges.
Fault alarms for low flow, low battery etc.
Probes for a wide range of applications.

Gasurveyor 500 Series Models
Sensor 511 512 521 522 523 524 525 526 531 532 533 534 536 541 542
0-100% LEL                              
0-100% GAS                              
0-1000ppm CH4                
0-25% O2                
0-200ppm H2S              
0-1000ppm CO              
Flammable LEL 0 - 100% 0.1% (0 - 9.9%)
1% (10 - 100%)
Flammable Volume 0 - 100% 1%
Flammable ppm 0-1000ppm 1ppm
0-200ppm 1ppm
CO 0-1000ppm 1ppm

GMI Gasurveyor 500 Series Specifications
Display LCD with automatic backlighting.
Humidity 0 - 100% R.H. non-condensing.
Temperature: -20° C to +50° C (-4° F to +122° F).
Alarms Highly visible flashing LED’s on display panel
Sounder in excess of 80dB(A), typically 85db(A) @ 1m.
Sampling Integral pump with flow fail sensor
Sample path is protected by a hydrophobic filter and automatic pump switch-off.
Battery 4 ‘D’ type batteries – alkaline or rechargeable battery pack.
Battery life 15 hours alkaline or 9 hours rechargeable.
Construction Moulded polypropylene case.
Rating IP54 (Dust protected and splashproof).
Conforms to standard EN 50104.
Response Time (typical) LEL Flammable: 3 secs (t50); 5 secs (t90)
Oxygen: 7 secs (t90)
Toxics: 15 secs (t90).
Certification ATEX II 2 G EEx ia d IIC T4 (Ta = -20oC to +50oC).
IECEx Ex ia d IIC T4 Gb (Ta = -20oC to +50oC).
UL Class I Groups A, B, C and D.
CSA Class I Groups ABCD C22.2 No. 152.
Dimensions 180 x 95 x 105 mm / 7.1 x 3.7 x 4.1 in.
Weight 1.7 kg / 3.75 lbs.
Gasurveyor warranty: Two years.


GMI Gasurveyor 500 Datasheet

PDF Specifications of the GMI Gasurveyor 500 Series.

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GMI Gasurveyor 500 Series
Case Gasurveyor 500 carrying case c/w inserts & label. 13405
Harness Carrying harness. 12370
Charger Standard charger c/w Universal Power Supply. 13844
Desktop Charger GS500 Desktop charger c/w Universal 12V Power Supply. 14815
Charging Station GS500 in-vehicle charger c/w Lighter Plug and Bracket. 14810
Car charger lead 12V - Standard charger only. 12988
Filter Dust filters (pack of 20). 42388

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