Gas detection3
Respiratory protection4
Technical rescue9
Firefighting4
Safety & environment4
Personal protective equipment2

SafeTech Multi BT-S40 — multi-gas detector with man-down function and 4G option
The SafeTech Multi BT-S40 is a rugged multi-gas detector (EX, O₂, H₂S, CO, CH₄) with a worker-fall signaling function (man-down) and an optional 4G module for remote monitoring. IP66 protection, a 3600 mAh lithium battery, two data-logging modes (alarm and cyclic) with memory for 20,000 records per channel. A solid, rubberized housing provides high mechanical resistance — for the toughest applications and lone working.
The SafeTech Multi BT-S40 is a rugged multi-gas detector (EX, O₂, H₂S, CO, CH₄) with a man-down function and an optional 4G module for remote monitoring. IP66 protection rating, a 3600 mAh lithium battery, two data-logging modes (alarm and cyclic) with memory for 20,000 records per channel. A solid, rubberised housing ensures high mechanical resistance — for the most demanding applications and lone working.
Key features
- Gas measurement: EX, O₂, H₂S, CO and CH₄ (methane).
- Man-down function — signalling a worker's fall/immobility.
- Optional 4G module for remote monitoring (connection to a server).
- IP66 protection rating; rubberised, rugged housing.
- Li-Ion 3600 mAh battery; charging < 7 h; sensor lifetime 2 years.
- Two logging modes: alarm and cyclic; 20,000 records per channel.
- Explosion-proof construction Ex ib IIC T4 Gb.
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 · CH₄ |
| Alarm thresholds | H₂S 10/35 ppm · CO 50/150 ppm · O₂ 19.5/23.5 %vol |
| Response time | T90 < 60 s |
| Power supply | Li-Ion battery 3.7 V / 3600 mAh; charging < 7 h |
| Sensor lifetime | 2 years |
| Functions | man-down (fall), optional 4G module, GPS (option) |
| Data logging | alarm and cyclic mode; 20,000 records / channel |
| Protection rating | IP66 |
| Ex class | Ex ib IIC T4 Gb |
| Dimensions / weight | 186 × 86.6 × 58.6 mm / approx. 475 g |
Applications
Lone working, confined spaces, industry, rescue, remote monitoring of teams (4G option), difficult environmental conditions.
Frequently asked questions (FAQ)
What is the man-down function?
It is automatic signalling of the user's fall or immobility — crucial during lone working; the detector alerts the surroundings/server.
Does the BT-S40 have remote monitoring?
Yes — the optional 4G module allows data to be transmitted to a server and devices to be monitored remotely (with a GPS option).
How many gases does it measure?
EX, O₂, H₂S, CO and CH₄ (methane) — with data memory of 20,000 records per channel.
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 BT-S40 — multi-gas detector with a man-down function and a 4G option — 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.


