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Gas Surveyor 700 Series

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The GMI Gasurveyor complies with international marine regulations for Gas Leak Outdoors, Purge, Search, Barhole, Confined Space and many other marine applications in vessels such as LNG / LPG Tankers, Oil Tankers, Fruit Carriers, and Refrigerated Cargo Ships.

Up to 5 gases can be simultaneously measured and displayed. The basic instrument can measure 0-100% LEL and 0-100% VOL GAS. The LEL range indicates the explosivity of the flammable gas in the sample. This is displayed as a percentage of the lower explosive limit (LEL) of the gas. Other models can measure the following gas types: Oxygen (O2), Hydrogen Sulphide (H2S) and Carbon Monoxide (CO).

Ensuring compliance
Intelligent data-logging functionality together with optional GPS mapping simplifies data gathering. Our Instrument Management System improves fleet management by providing access to field usage reports, calibration history, investigation mapping and many other bespoke reports; making it easier for our customers to demonstrate compliance.

Natural gas discrimination
Quickly determines the source of gas leaks, whether it’s pipeline gas or naturally occurring biogas; saving valuable time and reducing detection related costs.

Flexible configuration
The GS700 can be configured to meet specific application needs and can be customised to suit a range of user requirements, settings and languages.

Package includes:

  • Gasurveyor 700 Instrument
  • Carry Case
  • Shoulder Harness
  • 35cm Closed End Plastic Probe
  • Probe Handle & Adaptor
  • Cotton Filters (Box of 10)
  • ‘D’ size batteries x 3 (if applicable)
  • User CD
  • Instruction Card
  • Shipping List

Key Features

  • LEL & Volume Gas (infrared)
  • Optional sensors including PPM, O2, CO, H2S
  • Barhole Mode – configurable
  • Soft-key Operation
  • Communication: IrDA & Bluetooth (optional)
  • 360° Alarms
  • Lightweight & Rugged
  • Ingress Protection – IP55
  • Alkaline or Rechargeable battery options.


  • Gas Leak Outdoors
  • Pipeline Gas Tests
  • Purging
  • Tank Cleaning 
  • Surveying
  • Bar-holing
  • Confined Space Monitoring.

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Talk with the Experts

Contact us - Our application specialists will identify the best gas monitoring equipment for your needs based on the information that you can provide. If you're unsure about what's important, consider booking a site survey.

Book a site survey - Our specialists consider your process, your site conditions and work with you to understand your needs. It is the most effective means of ensuring your system is completely fit for purpose.

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