Gas detection3
Respiratory protection4
Technical rescue9
Firefighting4
Safety & environment4
Personal protective equipment2
GfG Micro IV — single-gas detector (interchangeable sensor, ATEX)
The GfG Micro IV is a compact, lightweight single-gas detector made in Germany by GfG, for personal protection of the worker and measurement of a single gas in confined spaces. It features an electrochemical sensor (oxygen or toxic gases), a backlit LCD display and a triple alarm: visual, audible and vibrating. A metallized polycarbonate housing and ATEX certification allow operation in explosion-hazard zones. The sensor is selected for the specific hazard.
The GfG Micro IV is a compact, lightweight single-gas detector made in Germany by GfG, for personal worker protection and measurement of a single gas in confined spaces. It is equipped with an electrochemical sensor (oxygen or toxic gases), a backlit LCD display and a triple alarm: optical, acoustic and vibrating. A metallized polycarbonate housing and ATEX certification ensure operation in potentially explosive atmospheres. The sensor is selected to match the specific hazard.
Note: The measured gas is a sensor configuration option of the same model — selected when ordering. Selected values (ranges, IP, operating life) depend on the sensor version; we confirm them against the manufacturer’s current datasheet during selection.
Key features
- Wide range of interchangeable electrochemical sensors: O₂, H₂S, CO (and CO-H), NH₃, SO₂, Cl₂, ClO₂, PH₃, NO₂, HCN, HCl, ETO, HF, O₃, NO, H₂ and others.
- Diffusion measurement; backlit LCD display.
- Alarms: 3 instantaneous concentration thresholds + 2 exposure thresholds (TWA/STEL); optical, acoustic (~95 dB) and vibrating.
- Powered by 1× AA battery — approx. 6 months of operation (per manufacturer datasheet).
- Lightweight, metallized polycarbonate housing; weight from ~61 g.
- ATEX II 2G Ex ib IIC T4/T3 Gb certification — operation in Ex zones.
Technical specifications
| Parameter | Value |
|---|---|
| Type | single-gas, interchangeable electrochemical sensor |
| Measured gases | incl. O₂, H₂S, CO (CO-H), NH₃, SO₂, Cl₂, ClO₂, PH₃, NO₂, HCN, HCl, ETO, HF, O₃, NO, H₂ |
| Ranges (selected) | O₂ 0–25 %vol. · H₂S 0–100/500 ppm · CO 0–500 ppm · HCl 0–30 ppm (depending on sensor) |
| Sampling | diffusion |
| Dimensions / weight | 47 × 88 × 25 mm / from ~61 g (depending on configuration) |
| Protection rating | IP54 (per GfG catalog datasheet) |
| Operating life | approx. 6 months on an AA battery (per manufacturer) |
| Alarms | optical (LED), acoustic ~95 dB, vibrating; 3× concentration + TWA/STEL |
| Operating conditions | −20…+55°C; 5–95% RH; 80–120 kPa |
| Approvals | ATEX II 2G Ex ib IIC T4/T3 Gb; EMC EN 50270 |
| Warranty | sensors: full 3 years for O₂, H₂S, CO; 2+ years for most others |
Applications
Personal worker protection, confined spaces, industry, gas industry, water treatment and wastewater, maintenance work in Ex zones.
Frequently asked questions (FAQ)
Which gases does the GfG Micro IV detect?
It is a single-gas detector with an interchangeable sensor — one gas per unit, selected from a wide range: O2, H2S, CO, NH3, SO2, Cl2, PH3, NO2, HCN, ETO and others. We will help you select the sensor to match the hazard.
How long does it run on a battery?
The GfG manufacturer datasheet states approximately 6 months of operation on an AA battery; the time depends on the number of alarms and the sensor type.
Is the Micro IV certified for potentially explosive atmospheres?
Yes — it holds ATEX II 2G Ex ib IIC T4/T3 Gb certification and is suitable for operation in Ex zones.
Brand & service
GfG (Gesellschaft für Gerätebau, Germany) — SafeTech provides sensor selection, calibration, certification and service of GfG detectors in Suchy Dwór near Gdynia.
Why SafeTech
- 23 years of experience in gas detection (company operating since 2003).
- Authorized distributor and authorized service station (incl. Honeywell).
- In-house service, calibration, certification and adjustment in Suchy Dwór near Gdynia — service throughout Poland.
- Training and technical support (SafeTech Safety Academy).
Availability & service — Gdynia and Tricity
GfG Micro IV — single-gas detector (interchangeable sensor, ATEX) — sales, selection, calibration and service in Gdynia (Suchy Dwór, on the border of Gdynia and the Kosakowo municipality). We serve the Tricity area (Gdańsk, Sopot, Gdynia), Rumia, Reda, Wejherowo, the Pomerania region and all of Poland. Ask about our offer and availability.
Accessories and compatible equipment
- Calibration & bump test: stacja GfG DS400, calibration gas mixtures, regulators and pressure-reducing valves for cylinders.
- Sensors & filters: replacement sensors matched to the measured gas, dust and hydrophobic filters.
- Sampling: probe, hose, aspirator bulb (for diffusion versions).
- Carrying & protection: lanyard, clip, holder, transport case, charger/power supply.
Full selection of accessories and parts for this model — request a quote.
