Available transducers and transmitters for potentially explosive atmospheres are shock pulse transducers, vibration transducers and transmitters.

Dual Technology accelerometer

The DuoTech® accelerometer for explosive atmosphere is a single transducer solution used for vibration measurements or shock pulse measurements or both in combination. It provides maximum flexibility to select the best measuring technique for a given type of problem or application. DuoTech is an individually tuned piezo-electric accelerometer delivering excellent performance in a very large area of applications. 

The accelerometer is internally isolated in a Faraday shield providing maximum protection from ground loops and RF interference. It is IEPE compatible and connects to standard vibration inputs via twisted pair cable and MIL type connector. This facilitates easy integration into existing equipment and makes the accelerometer an excellent and cost efficient choice for retrofit projects. The nominal sensitivity is 100mV/g and the shock pulse measuring range is -12 to 75 dB.

Stainless acid proof steel housings and hermetic sealing make it suitable for rough environments.

Ex marking
I M1 Ex ia T4 Ma
II 1G Ex ia IIC T4 Ga
II 1D Ex ia IIIC T135°C Da, Ta -40°C to +100°C


Shock pulse transducers

The 44000-family of transducers for explosive atmosphere is approved for use in mining, explosive gases and dust.

The transducer is connected to a suitably certified SPM measuring instrument for bearing condition monitoring. Instruments outside hazadours areas must be connected via a suitable and certified barrier.

Transducer must me fitted with either a mating cable plug or a protection plug to maintain an ingress protection of minimum IP54.

Ex marking
I M1 Ex ia I Ma
II 1G Ex ia IIC T4 Ga
II 1D Ex ia IIIC T135°C Da, Ta -40°C to +120°C


Vibration transducers

The SOLID transducers are piezo-electric accelerometers of compression type, each individually tuned. Enhanced electronics and improved ambient characteristics deliver excellent performance in a very large area of applications.

The SOLID transducers and transmitters are designed to withstand the rigors of industrial environments. Stainless, acid proof steel housings, case isolation and hermetic sealing make them very robust.

Ex marking
I M1/II 1G Ex ia I/IIC T4 Ma/Ga
II 1D Ex ia IIIC T112°C Da IP 66/67



The SOLID transmitters can be used toghether with all our intrinsically safe instruments except for Leonova Diamond IS and Leonova Emerald IS. The transmitters provide a 4-20 mA output signal proportional to the vibration velocity, across its frequency range. The output signal can be transmitted to common process control systems like  PLC, DCS and SCADA. The transmitters operate using power from any standard 4-20 mA loop. No additional power is necessary.

Features of the transmitters are unique micro controller design and calibration data stored in the sensor. The measuring range is 0 - 25 mm/s and the frequency range 2-1000 Hz.

The SOLID transducers and transmitters all come with top connector for fast and easy installation. A special SOLID transducer with side connector is also available for use in rough industrial environments where moist and water may cause equipment problems.

Ex marking
I M1/II 1G Ex ia I/IIB T4 Ma/Ga
II 1D Ex ia IIIC T97°C Da IP 66/67