Gas detection3
Respiratory protection4
Technical rescue9
Firefighting4
Safety & environment4
Personal protective equipment2
SafeTech Multi BH-4S — portable 4-gas detector (EX, O₂, H₂S, CO)
The SafeTech Multi BH-4S is a portable multi-gas detector for continuous detection of combustible gas (EX), oxygen (O₂) and two toxic gases (H₂S, CO). Diffusion measurement, a clear LCD display showing real-time concentrations and a triple alarm: visual (LEDs), audible and vibrating. A lightweight, compact housing and a lithium battery provide at least 8 hours of operation. Ideal for personal protection and confined-space entries in explosion-hazard zones.
The SafeTech Multi BH-4S is a portable multi-gas detector for the continuous detection of flammable gas (EX), oxygen (O₂) and two toxic gases (H₂S, CO). Diffusion measurement, a clear LCD display showing concentrations in real time and a triple alarm: optical (LEDs), audible and vibrating. A lightweight, compact housing and a lithium battery provide at least 8 hours of operation. Ideal for personal protection and confined-space entry in explosion-hazard zones.
Key features
- Measurement of 4 gases: EX (flammable gas), O₂, H₂S, CO — diffusion measurement.
- Triple alarm: optical (LED), audible and vibrating.
- Clear LCD display with real-time concentrations and system status.
- Fast response: T90 < 30 s.
- Li-Ion 1800 mAh battery; ≥ 8 h of continuous operation; charging 6–8 h.
- Explosion-proof construction Ex ib IIb T3 Gb.
- Lightweight (400 g) and compact (130 × 67 × 30 mm).
Technical specifications
| Parameter | Value |
|---|---|
| Type | portable multi-gas detector (diffusion) |
| Measured gases | EX 0–100 %LEL · O₂ 0–30 %vol · H₂S 0–100 ppm · CO 0–1000 ppm |
| Alarm thresholds | EX 20/50 %LEL · H₂S 10/35 ppm · CO 50/150 ppm · O₂ 19.5/23.5 %vol |
| Resolution | EX 1 %LEL · H₂S/CO 1 ppm · O₂ 0.1 %vol |
| Response time | T90 < 30 s |
| Signalling | LCD, LEDs, audible and vibrating alarm |
| Power supply | Li-Ion battery 3.7 V / 1800 mAh; charging 6–8 h |
| Operating time | ≥ 8 h of continuous operation (without alarms) |
| Ex class | Ex ib IIb T3 Gb |
| Dimensions / weight | 130 × 67 × 30 mm / 400 g |
| Other gases | to order (contact the supplier) |
Applications
Personal protection, confined-space entry, ducts, manholes, industry, explosion-hazard zones and zones at risk of gas leakage.
Frequently asked questions (FAQ)
Which gases does the SafeTech BH-4S measure?
Four simultaneously: flammable gas (EX), oxygen (O₂), hydrogen sulphide (H₂S) and carbon monoxide (CO). Other sensor configurations — to order.
Does it have a vibrating alarm?
Yes — it alarms optically (LED), audibly and by vibration, which increases warning effectiveness in noise.
How long does it run on the battery?
At least 8 hours of continuous operation on the 1800 mAh battery; full charging takes 6–8 h.
Brand & service
SafeTech — an own-brand product. We carry out sensor configuration selection, calibration, sensor replacement and service directly. Polish menu and support.
Why SafeTech
- 23 years of experience in gas detection (the company has been operating since 2003).
- SafeTech own-brand product — technical support, warranty and service from the provider of the offer.
- In-house service, calibration, certification and adjustment in Suchy Dwór near Gdynia — support throughout Poland.
- Training and technical support (SafeTech Safety Academy).
Availability & service — Gdynia and Tricity
SafeTech Multi BH-4S — portable 4-gas detector (EX, O₂, H₂S, CO) — 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 province and all of Poland. Ask about our offer and availability.
Accessories and compatible equipment
- Calibration & bump test: stacja dokująca/kalibracyjna, 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.
