PS200 Gas Detector Diffusion

SKU: M64041

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The GMI PS200 is our most popular gas detector. It monitors up to 4 gases and is primarily used in and around confined spaces. 

> Gases - The PS200 multi-gas detector simultaneously monitors up to four gases, including Oxygen (O2), Combustibles (LEL), Hydrogen Sulphide (H2S) and Carbon Monoxide (CO)

> Data Storage - Session: Minimum of 180 logs, Timed: 24 hours of timed logs at 1 log per minute

> Product Rating - IP67 rating - dust-tight and waterproof to 1 metre

> Battery - Run Time (diffusion): The low power LEL sensor provides up to 80 hours of run time

> Advanced Features - MED approval for use in marine and shipping applications

> Delivery - Usually in stock and can be delivered within 3 working days*

Excl. VAT: £320.00 Incl. VAT: £384.00

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Excl. VAT: £320.00 Incl. VAT: £384.00

Product Description


Detects and displays up to 4 gases simultaneously, the PS200 gas detector from GMI is suitable for providing gas detection in a host of applications across a variety of industries thanks to its IP67 rated casing. 

The PS200 can be configured to detect a combination of Methane, Oxygen, Carbon Monoxide, Hydrogen Sulphide, as well as other flammable gases.

A robust and accurate portable gas detector, the Personal Surveyor (PS200 Series) provides protection in confined space applications with audible and visual alarms in the event of exposure to flammable or toxic gases.

Useful Benefits for the User

STEL and LTEL Visible on Screen

Users will now be able to visualise their short-term and long-term exposures to Carbon Monoxide (CO) and Hydrogen Sulphide (H2S) by toggling past the ‘MIN’ and ‘MAX’ readings on-screen enabling them to quickly determine current exposure rates and take appropriate action.

Quick Configuration Display

Users can now check the configured status (sensors installed, calibration due timeline, pumped or diffusion, and the calibration gas required) of their instrument without fully switching it on. This enables a quicker assessment of the instrument suitability for the application or environment of use.

H2S Resolution Improvement

We have also improved the resolution for instruments equipped to detect H2S from 1 to 0.1 enabling users greater control of their alarm set points, improving confidence levels when working in harsh environments.

Useful Features for Maintenance or Service

Battery Life

A lithium-ion battery provides run time of up to 80 hours* when using the low power LEL sensor (however, this needs to be bought as an extra).

When your PS200 battery has completely run flat, re-charging only take 4 hours. You can expect an 80% charge within 2 hours of re-charging.


The PS200 now comes as standard with a 3-year life O2 cell. Currently, this version containing the 3-year O2 sensor is NOT MED certified.

LEL Sensor Options

A PS200 variant is now available with a 5-year life Oxygen sensor, again this is not MED certified as yet. This new sensor is non-lead based and as such also offers a reduction in the weight of the PS200 of approximately 10g (5%).

The PS200 now has 4 options for LEL sensors:

  1. Standard Unfiltered catalytic (pellistor) bead – ideal for all combustible gases <C9
  2. Optional Filtered (Enhanced) catalytic (pellistor) bead – Removes >C6 combustibles, used for Methane, Ethane, Propane, Butane, Pentane, Hexane and hydrogen
  3. Optional Low power catalytic (pellistor) bead - gives 80+ hrs battery life & Zone 0 certification used for Methane, Ethane, Propane, Butane, Pentane, Hexane
  4. Optional IR Based sensor – gives 80+hrs battery life and reduced weight of the instrument, ideal inert/purging applications, the calibration curve is only for Methane

The enhanced filtered LEL sensor provides resistance to airborne sensor poisons such as high concentrations of hydrogen sulphide gas and volatile silicone vapours.

Handy Features for Health & Safety Management

Increased Datalogging Capacity

The PS200 has a powerful new datalogging capacity that will enable users to capture all relevant calibration and session data over a 6-month period. This increased capacity allows users to log data over a longer period of time and supports the effective demonstration of compliance in line with audits and internal procedures.

Rubberised Protective Coloured Cases

The PS200 comes as standard in rugged, black casing. To provide maximum protection, rubberised protective cases can be fitted to the detector. These are available in 7 colours (black, grey, yellow, red, orange, blue and green). Choose alternative colours for quickly and easily classify multi-site or multi-application working.

Man-Down Alarm

Any PS200 with the 5-year O2 cell installed can have an optional man-down sensor installed, however, this is not compatible with 2 or 3-year versions of the PS200.

MED Approval

The PS200 is particularly suited to the shipping and marine applications because of the Marine Equipment Directive (MED) approvals to support the SOLAS regulation XI-1/7 which came into force in July 2016. 

The MED approval is recognised by the wheel marking - a ship's wheel.

A Marine version of the PS200 is released with the Prefix “M” in front of the old part number i.e. M64041. This model is MED certified but still features the previous 2-year O2 Cell and carries a 2 yr warranty. For MED certification, this unit can only utilise the original catalytic bead LEL sensors (filtered/non-filtered) i.e. 64041 or 64041A but not the new low power or IR versions.

Compliance Capabilities

The PS200 has a built-in safety feature that has the ability to turn itself off when calibration is overdue. This forces the gas detector to be calibrated.


The unit will come up with a red screen reminder upon calibration date when you turn the monitor on, it will then skip on and finish the warm-up period. The LEDs will flash red periodically and the screen during normal operations will periodically flash “calibration required”.

Confirmed Reminder

Exactly as above, however, the user will need to confirm by a button press that they are happy to use the monitor out of calibration during the warm-up period.

Lock Out

The unit will go through a warm-up but then enter alarm with a red screen saying “switch off calibration required” the unit will not enter normal operations and will remain on this screen until the unit is calibrated or switched off.

Lockout with Extension

This is the same as above, however, the manager can build in a buffer period that allows the user a grace period (1-30days). The unit will turn on and show the “switch off calibration required” screen, however, they have the option of pressing the confirm key and extending the cal date out by whatever has been set in the unit. You can only extend once, i.e. if you allow an extension for a week then at the end of the week the unit will just lockout. The idea of the extension is to allow remote workers to carry on with operations without having to take a detour back to a depot for calibration i.e. an engineer could complete his work if he knew 3 days later he was back in the office to calibrate the unit.

Bump Testing & Calibration Log

The PS200 retains the last five bump test and calibration data. In addition to displaying all gas readings simultaneously, the user can also initiate a manual bump test anytime using the low-cost Auto Bump/Calibration (ABC) test station.

The ABC station dramatically improves compliance record-keeping, efficiency, and accuracy. Once the PS200 is placed in the dock it can be tested, calibrated, and charged. Extremely cost-effective, the station requires no testing and minimal effort by users


M64041 4-Gas Standard Filter LEL Sensor/O2/H2S/CO Diffusion MED Approval

M64041A 4-Gas Enhanced Filter LEL Sensor/O2/H2S/CO Diffusion MED Approval

See LEL Sensor Options for details.

For the Purchaser

The PS200 comes complete with:

Instrument supplied with: User CD, Quick Op Guide, Universal PSU/Communications Cable, 6 months calibration certificate. The Quick Operation Guide (QOG) now includes a QR / website link enabling easy access to the document library. 

Additional optional accessories: Vehicle charging kit and coloured rubber boots for multi-site or multi-application working.

Consider the lifetime costs of your gas detectors - New 2 year service contract available for just £120

Volume Sales - Contact us for a price

PS200 Hire

For the measurement of CO, H2S, LEL and H2S in confined spaces, the PS200 provides rugged and reliable detection. With long battery life and 3 alarms to alert gas hazards, the PS200 is an ideal detector for short or long term hire.

Upgrade to a Pumped Gas Detector

Do you already own a non-pumped PS200 but would like a pumped unit? Buy the pump assembly (part number 64255) and a1-cbiss will retrofit it

Watch the video


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Product Downloads

View FilePS200 Enhancements June 2019
View FileGMI PS200 Datasheet
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