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PRESSURE TRANSDUCER
The 0 - 16 bar (4 - 20 ma) pressure transducer detects the steam pressure inside the generator and converts it into a current value,
then transmits it to the control panel supervising generator operation.
IMPORTANT
m
The technical specifications of this device are available in the manual supplied with it.
CAPACITIVE PROBE
The capacitive probe, combined with the pre-amplifier, has been designed for the adjustment or ON-OFF control of the conductive
liquid level. It can also be used with one or more control units/transducers to provide, besides the control, also any level and/or
outlet alarms of a BMS supervision system.
The pre-amplifier is finger screwed on probe upper end, and can be easily removed without affecting the operation of the probe.
Pre-amplifier
20 mA
4
mA
Pre-amplifier
The pre-amplifier is a current loop level transducer to be used in combination with the capacitive probes. It generates a 4 – 20 mA
output signal, which is proportional to the water level present inside tank or generator.
It features two keys and a two-colour (red and green) light signal indicator to be used during commissioning. The device consists
of an austenitic stainless steel tubular body screwed on the top of the capacitive probe, and features a DIN 43650 connection head
and a Pg 11 cable gland. Do not replace the cable gland with another one not of the Pg 11 type.
Probe
The capacitive probe is a metal bar with a special coating ensuring a complete isolation from the liquid where it is immersed. It
measures the capacity of a tank through the capacity variation, which is directly proportional to the level variation. The capacity
value is measured by the pre-amplifier and transmitted to a control unit or to a transducer as a direct current signal. Controls
and settings are on the control unit. The pre-amplifier sensitivity is defined based on the immersed length of the probe, and the
relevant wiring diagrams are included in the related installation and maintenance instructions.
18
Probe
1
2
3
4
5
6
1
Ring
2
Plate
3
Case
4
Body
5
Tip
6
Insulating coating
General information
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