Gas Detectors & Accessories
Reliable gas monitoring is essential for work in manholes, pipelines, and hazardous zones. Our gas detection devices and matching accessories ensure maximum safety and compliance with applicable industry standards for gas detection and occupational safety. Portable multi-gas detectors such as the Microtector III G888 for personal protection or the Polytector III G999 for remote sampling combine rugged design, intuitive operation, and precise sensor technology for up to five gases.
We also supply test stations for automated bump tests and calibrations, antistatic sampling hoses, floating probes for safe gas sampling at liquid surfaces, and charging stations for daily use. For standard-compliant testing, we offer calibrated test gas mixtures. Choose certified quality “Made in Germany” – for maximum occupational safety in sewer maintenance, wastewater management, and industrial applications.
Mobile Gas Detector Polytector III G999C/5 with Pump – for Entry and Clearance Measurement
The portable gas detection device Polytector III G999C/5 from GfG
Made in Germany: The Polytector III G999C/5 is a robust and high-performance multi-gas detector with an integrated pump. It has been specially developed for use in wastewater and sewer applications and enables the simultaneous monitoring of up to five gases. Whether for manhole entry, pre-entry clearance measurements, or maintenance work – this multi-gas detector delivers reliable safety.
Product Features
Simultaneous measurement of up to 5 gases: flammable gases (LEL – CH4), CO2, CO, O2, H2S
Integrated pump: For active sampling – ideal for work in manholes and confined spaces
ATEX explosion protection: Suitable for Zone 1 and Zone 2 applications
Protection class IP67: Dustproof, waterproof, and shock-resistant – perfect for harsh working conditions
Large display & intuitive operation: Clear display, rotatable by 180°, user-friendly 3-button menu navigation, incl. LED flashlight
Long battery life: Up to 130 hours in diffusion mode, approx. 20 hours in pump mode
Multifunctional alarms: Audible, visual, and vibration alerts – includes man-down alarm in case of immobility
Alarm simulation: Simulate hazardous scenarios for training purposes
Data logger: Stores up to 30,000 readings, 12 values simultaneously
PEAK function: Displays peak gas values
Optional accessories: Can be extended with sampling hose and floating probe – essential for clearance measurements and measurements over liquid surfaces
Practical Benefits
Reliable personal protection: Early gas detection saves lives during sewer and maintenance operations
Man-down alarm: Two-stage local warning in case of immobility
Strong warning functions: Audible, visual, and vibration alarms – effective even in noisy environments
Fast clearance testing: With pump and sampling hose, sewer clearance measurements can often be completed within one minute
Practical design: Operable with gloves, even in wet and dark environments
Typical Applications
Pre-entry gas testing in sewers, manholes, and wastewater shafts
Pumping stations, wastewater treatment plants, biogas facilities, and other ATEX zones
Industrial applications in chemical plants, utilities, and gas supply networks
Rescue and safety services during incidents and emergency operations
Important Note
To perform clearance measurements with the Polytector III G999C/5, a sampling hose (available separately) is required. For measurements over liquid surfaces, a floating probe is also available as an accessory. Without the sampling hose/floating probe, the device can only be used for direct point measurements – not for clearance testing.
Which device is right for your application?
The Polytector III G999C/5 is the first choice for manhole entry, clearance measurements, and demanding applications with active sampling – thanks to its integrated pump.
Looking for a compact and lightweight device for routine sewer and manhole work without a pump? The Microtector III G888C/5 is the perfect solution – note: not suitable for clearance measurements.
Gas Detector Microtector III G888/C5 - Compact and Lightweight for Personal Gas Protection
The Microtector III G888C/5 is a portable multi-gas detector for monitoring up to five gases (Made in Germany). Compact, lightweight, and highly robust, it protects professionals during operations in manholes, sewers, pumping stations, and other Zone 1/2 hazardous areas. An ideal, cost-effective solution for professionals in wastewater technology, industry, and utilities – anywhere gas hazards need to be detected reliably.
Product Features
5-gas measurement: Combustible gases (LEL), CO2, CO, O2, H2S
Certification: Explosion-proof according to ATEX for use in Zone 1 and 2
Housing: Shock-resistant, rubberized polycarbonate, IP67 (waterproof and dustproof)
Display and operation: Clear display, 180° rotatable, intuitive 3-button navigation, integrated LED flashlight
Operating time: Battery life up to 65 hours
Alarms: Audible, visual, vibration alarm with man-down function
Training mode: Realistic alarm scenarios for training and exercises
Internal data logger: Stores and documents up to 30,000 measurements
Practical Benefits
Compact & lightweight: At only ~450 g, perfect for daily field use, confined spaces, and long shifts
Rugged personal protection: Triple alarm plus man-down function for safety in critical situations
High flexibility: Combines sensors for combustible, toxic gases and oxygen in one device
Easy operation: Large buttons allow intuitive control even with work gloves or in wet environments
Typical Applications
Routine operations in sewers, manholes, and wastewater structures
Maintenance and servicing in pumping stations, wastewater treatment plants, and biogas facilities
Gas measurements in confined spaces such as tanks, silos, or technical chambers
Gas safety checks in industrial plants and Zone 1/2 hazardous areas
Which gas detector suits your application?
The Microtector III G888C/5 is the compact solution for routine work in manholes and sewers where no pump or remote sampling is required.
Looking for a device for remote measurements or pre-entry checks with active sampling? We recommend the Polytector III G999C/5 with integrated pump.
Test Station TS 888/999 for GfG Gas Detectors G888 + G999, including Gas Sampling Fitting and Software
The GfG TS 888/999 test station is the optimal solution for safe and standards-compliant testing
of your Microtector III G888 and Polytector III G999 gas detectors.
It enables easy daily display and function tests. The scope of delivery includes a gas sampling fitting and
the appropriate configuration software – for immediate and convenient commissioning.
Product Features
Compatibility: For Microtector III G888 and Polytector III G999
Automated: Performs bump tests (function tests) and calibration
Charging function: Integrated charging unit for connected devices
Included accessories: Gas sampling fitting and configuration software
User interface: Simple operation via keypad with LED status indicator
Logging: Automatic storage of test results
Gas connection: Connection for calibration gas cylinder with flow regulator
Your Benefits
Time-saving: Fast, automated test procedures at the push of a button
Reliable: Increases operational safety through regular test cycles
Complete solution: Includes software and gas fitting – ready to use immediately
Practical: Integrated charging function – ideal for daily use
Note
A suitable calibration gas cylinder with flow regulator is required to operate the test station (not included).
The power adapter, a memory card for data storage, and a USB interface cable for data transfer are available separately.
Charging Station DIC 888/999 incl. Power Supply for GfG Gas Detectors G888 & G999
The DIC 888/999 charging station is the matching desktop charging station
for the Microtector III G888 and Polytector III G999 gas detectors from GfG.
It ensures reliable and safe charging of the device batteries – ideal for daily use in
sewer and wastewater applications. Thanks to its robust construction, the charging cradle
is particularly durable and designed for tough working environments.
Product Features
Compatibility: Suitable for Microtector III G888, Polytector III G999, and the portable safety monitor TeamLink
Power supply: Includes EU plug-in power adapter (230 V)
Charging function: Contactless charging via robust charging contacts on the device
Charge indicator: LED status display for easy monitoring of the charging process
Your Benefits
Convenient: Simply place the device in the cradle without plugging into the device itself
Reliable: Stable power supply for gas detectors that are always ready for use
Robust: Durable, maintenance-free design for demanding environments
Space-saving: Stackable housing – perfect when multiple charging stations are used
Note
For mobile use, the charging cradle can also be operated with an optional vehicle charging cable –
ideal for service vehicles or flexible use on construction sites.
Floating Sampling Probe Type C for Polytector III G999 (with Pump)
The floating sampling probe has been specially developed for use in wastewater facilities, sewers, and manholes. It enables safe gas sampling directly at the water surface without the probe tip submerging. Perfect for use with gas detection devices with an integrated pump, such as the Polytector III G999C/5 from GfG.
Thanks to its robust, buoyant design and integrated fine filter, it reliably protects the connected gas detector from moisture and dirt – ideal for daily use in sewer and wastewater applications.
Product Features
Buoyant design: Prevents immersion into liquids
Antistatic, chemical-resistant material: Suitable for use in aggressive environments
Compatible with GfG gas detectors with pump: e.g., Polytector III G999C/5
Applications: Entry checks and safety measurements in wastewater channels, gas measurements in treatment plants, retention basins, and pumping stations
Your Benefits
Safe gas sampling: At water surfaces in sewers, manholes, and basins
Sensor protection: Prevents damage to the gas detector caused by water or contamination
Versatile use: Ideal for entry measurements and remote sampling in hard-to-reach areas
Quick to deploy: Easy to connect and portable
Test Gas – 5-Gas Mixture, approx. 200–220 Tests – Accessory for GfG Gas Detectors / Test Stations
This GfG test gas contains a precisely balanced 5-gas mixture consisting of 15 ppm H2S, 100 ppm CO, 2 vol-% CO2, 2.5 vol-% CH4 (57% LEL) and 15 vol-% O2 in nitrogen (N2) as the carrier gas. It is ideal for daily functional testing and calibration of multi-gas detectors such as the Microtector III G888 and the Polytector III G999. The composition is tailored to typical sensor configurations.
Note: The shelf life of the test gas is 24 months from the filling date.
Special Sampling Hose for Clearance Measurement with Polytector III G999 (with Pump)
The antistatic special sampling hose with integrated filter against particles and moisture is ideal for active gas sampling with GfG gas detectors (e.g., Polytector III) in sewer and wastewater applications. Its generous 6 m length allows for safe laboratory and clearance measurements from a distance – without the device itself entering contaminated or potentially explosive areas.
Product Features
Length: 6 m
Antistatic: Suitable for use in potentially explosive atmospheres
Filter: Integrated filter against particles and moisture – protects sensors and extends service life
Compatibility: Fits GfG gas detectors with pump function (e.g., Polytector III G999)
Application: Active gas measurement from shafts, tanks, or sewers – flexible and safe
Your Benefits
Increased safety distance: Gas detector remains outside hazardous zones
Optimized sensor protection: Filter prevents damage from moisture and particles
Flexible use: Length and antistatic design for demanding environments
Quick integration: Screw connection directly to existing GfG devices with pump adapter
MicroSD Memory Card – Accessory for GfG Test Stations TX, TS 888/999 and TX, TS 400
The microSD memory card is the matching original accessory for GfG test stations TX and TS 888/999 as well as TX and TS 400. It is used for the safe storage and archiving of test data generated during display and function tests as well as calibrations. Data evaluation is conveniently carried out via the GfG configuration software.
USB Interface Cable, USB to USB-Mini, 1 m – Accessory for GfG Test Stations TX, TS 888/999 and TX, TS 400
The USB interface cable (USB to USB-Mini, length: 1 m) enables direct connection of the TS 888/999 or TX 888/999 as well as TS 400 and TX 400 test stations to a PC. In combination with GfG software, test and calibration data can be conveniently transferred, evaluated, and archived. Device settings can also be centrally managed.
Plug-in Power Supply, 230 V AC – Accessory for GfG Test Stations TX and TS 888/999
The plug-in power supply is the matching power source for the TS 888/999 or TX 888/999 test stations. It enables safe stationary operation and the use of the test station’s integrated charging function.