EC28 i Transmitter

Intrinsically Safe for Toxic Gases, O2 and H2

Where toxic gases, oxygen or hydrogen are to be monitored in areas with a particular risk of explosion, the intrinsically safe EC28 i transmitter along with GfG‘s control units is a reliable and cost-effective solution. The power supply and transmission of the measured values are carried out via two-wire cabling.

Intrinsically safe operation
Due to its intrinsically safe build, the EC28 i can be used even in areas with a particularly high risk of explosion. A safety barrier (SB1 or Zener barrier; optionally available) has to be connected between the transmitter and the programmable logic controller (PLC) to convert the supply voltage to 24 V DC. This prevents the power lines from igniting within the Ex zone. The intrinsic safety of the EC28 i is ATEX-certified and makes it suitable for applications up to Ex zone 0.

Communication and Service
Communication is carried out via a 4-20 mA signal. The Smart Sensor technology enables quick and easy replacement of the sensor. Adjustments can be made using the RC2 remote control (one-man calibration).

Remote Control RC2 (optional)
Gases like ammonia and hydrogen are lighter than air. Transmitters with these sensors are therefore installed near the ceiling. To simplify servicing, these transmitters can be equipped with a permanently installed cable meaning that the RC2 remote control can be connected for maintenance work and settings can be made from ground level. The display of the RC2 remote control shows the same information as would be shown by the EC28 versions with a display. This makes inspection, maintenance and calibration much easier.

Reliable Measurement & Minimal Operating Costs
The sensor and built-in temperature compensation ensure the highest measuring accuracy. The long sensor service life and low maintenance requirements ensure minimal operating costs.

Detectable gases

AsH3 Arsine
B2H6 Diborane
Br2 Bromine gas
C2H4O Ethylene oxide
Cl2 Chlorine
ClO2 Chlorine dioxide
CO Carbon monoxide
COCl2 Phosgene
H2 Hydrogen
H2S Hydrogen sulphide
HCl Hydrogen chloride
HCN Hydrogen cyanide
HF Hydrogen fluoride
NH3 Ammonia
NO Nitrogen monoxide
NO2 Nitrogen dioxide
O2 Oxygen
O3 Ozon
PH3 Phosphine
SiH4 Silane
SO2 Sulphur dioxide
Other gases on request.


Extensions and accessories



Two-channel safety barrier for intrinsically safe transmitters
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Test gases

Test gases

You can find an overview of our test gases here
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Accessories EC28 i

Accessories EC28 i

Here you'll find the complete list of accessories for the EC28 i
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