STE-1421/1422
1
Installation Guide
Installation Guide
Sensor, Immersion
STE–1421/1422
Mounting and Wiring
Immersion type probes are designed to measure
the temperature inside pipes carrying liquid or
steam. They are installed in a brass (for noncorrosive
liquids) or 304 stainless-steel (for corrosive liquids)
thermowell.
Mount the thermowell horizontally or with the open
end facing down, to allow any condensation to drain.
Position the thermowell to prevent contact with the
inside of the pipe.
1. Install the pipe fittings required, by local code,
for a thermowell into the dry/drained pipe. If the
system is pressured, use a hot tap.
2. Install the thermowell. (See the Accessories
section.)
3. Fill the well with thermal compound to ensure
complete conductivity from well to probe.
Note: The probe can slide within its collar on the case
as it is inserted into the thermowell.
4. Remove the screws holding the cover to the case
and remove the cover.
5. Insert the probe into the well and tighten the
threaded connection on the case.
6. From inside the case, push the probe as far as it
will go into the well.
7. Feed the thermistor wire leads through the
conduit or hole opening.
Note: The two-wire sensor is polarity insensitive.
8. Connect the thermistor wires to the cable with
butt-splices or soldering (wire nuts are not
recommended).
9. Reinstall the cover and screws.
Accessories
The following thermowells are available for the
STE–1421 and STE–1422:
HMO–4533
4" brass well
HMO–4534
4" 304 stainless-steel well
HMO–4543
6" brass well
HMO–4544
6" 304 stainless-steel well
Note: NPT Thread Size = 1/2"
Thermowells Installed
