Huba Control 712 Operating Instructions Manual page 7

Construction
The level sensor consists of a ceramic measuring cell (relative and absolute
pressure) with an amplified electronic and is adjusted in the requested pressu-
re range. The sensor, the electronic and the connection cable are hermetically
encapsulated in a stainless steel case. The measuring diaphragm is protected
from outside influences by a protection cover. A venting pipe is included in the
connection cable for the relative version. The sensor, the electronic and the con-
nection cable are placed in a hermetic encapsulated small case.
The wide temperature range of the level sensor is compensated.
Application
The Type 712 transmitter is used for hydrostatic measurement of liquid levels,
e.g. in water supply, ship installations, in the oil and gas industry etc.
The calculation of the temperature related to the power supply with NTC
resistance is as follows:
T Temperature NTC [ÀC]
TEMP
T -273.15 [ÀC]
0
T 25 [ÀC]
25
U Voltage at NTC [V]
TEMP
CAUTION
Consider the chemical resistance of sensor, case, O-ring and connection cable
with the media.
Huba Control AG - Type 712 - Edition 07/2015 - 116381
a + b
In
•
•
R 20'000 [Ω]
a 0.001204001
b 0.000208775
c 0.000000294
+ c
In
•
3
•
7