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Note
If the sensor is to be used with a thermowell,
only use original SAMSON thermowells.
Weld on a pipe socket with female thread
(socket-weld design to fit the screw gland of
the sensor) of approx. 40 mm in length at
the place of installation (this also applies
when a thermowell is used).
Î Seal the screw gland of the sensor.
Installation with thermowell
When a thermowell is used, a welding sock-
et with G 1 female thread must be used.
1. Remove the double nipple (17) or ther-
mowell (if used) from the sensor (19) and
seal it into the welded socket.
2. Adjust the highest possible set point at
the set point adjuster (12.2) using the
key (12.1).
3. Insert the sensor with the associated seal
into the double nipple or thermowell. Se-
cure it with the coupling nut (16). The
entire length of the temperature sensor
(19) or thermowell must be immersed in
the process medium.
We recommend filling the free space be-
tween sensor and thermowell with oil or,
when installed horizontally, with grease or
any other heat transfer medium to avoid de-
lays during heat transmission. Observe the
thermal expansion of the filling medium. Al-
low some space for expansion or slightly
loosen sensor nut for pressure compensation.
EB 2111/2121/2123 EN
For temperature regulators with safety tem-
perature limiter (TR/STL), install the sensor of
the limiter near the sensor of the regulator.
Dynamic behavior of the control thermo-
stats
The dynamics of the regulator are mainly de-
termined by the response of the sensor with
its characteristic time constant (see Table
5-10).
Table 5-10: Time constants of SAMSON
thermostats (measurements with water)
Principle of
Type ...
operation
Thermostat
2231
2232
2233
Liquid
expansion
2234
2235
2213
Adsorption
2212
Not permissible
1)
Capillary tube
Carefully run the capillary tube (11) without
bending or twisting it. Avoid locations with
considerable ambient temperature fluctua-
tions along the entire length of the tube.
Note
Do not damage or shorten the capillary
tube. Roll up any capillary tube that is not
used. The smallest permissible bending radi-
us is 50 mm.
Installation
Time constant [s]
Without
With
Thermowell
70
120
65
110
25
–
1)
15
–
1)
10
–
1)
70
120
–
40
1)
5-3
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