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2.4
Use in hazardous areas
Qualified personnel for hazardous area applications
Persons who install, connect, commission, operate, and service the device in a hazardous area must have the following
specific qualifications:
● They are authorized, trained or instructed in operating and maintaining devices and systems according to the safety
regulations for electrical circuits, high pressures, aggressive, and hazardous media.
● They are authorized, trained, or instructed in carrying out work on electrical circuits for hazardous systems.
● They are trained or instructed in maintenance and use of appropriate safety equipment according to the pertinent safety
regulations.
WARNING
Unsuitable device for the hazardous area
Danger of explosion.
● Only use equipment that is approved for use in the intended hazardous area and labelled accordingly.
See also
Technical specifications (Page 35)
WARNING
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device has already been operated in non-intrinsically safe circuits or the electrical specifications have not been
observed, the safety of the device is no longer ensured for use in hazardous areas. There is a danger of explosion.
● Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe circuit.
● Observe the specifications for the electrical data on the certificate and in Chapter "Technical data (Page 35)".
3
Description
3.1
Application range
The pressure transmitter LH100 is a submersible sensor for hydrostatic level measurement. The pressure transmitter
measures the liquid levels in tanks, containers, channels and dams.
The pressure transmitter is available for various measuring ranges and optionally with explosion protection. A cable box and
an anchor clamp are available as accessories to make installation easier.
The pressure transmitter is used, for example, in the following industrial areas:
● Water supply
● For use in pressureless/open tanks and wells
3.2
Structure
The pressure transmitter has a built-in ceramic sensor which is equipped with a Wheatstone resistance bridge.
The pressure transmitter is equipped with electronics that is installed, together with the sensor, in a stainless steel
enclosure. There is also a vent pipe in the connecting cable.
The measuring diaphragm is effectively protected against external influences by a protective cover.
The sensor, the electronics and the connecting cable are housed in an enclosure with small dimensions.
The pressure transmitter is compensated for a wide temperature range.
SITRANS LH100 (7MF1572..) Transmitter for hydrostatic level
A5E32588610-02, 02/2014
25
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