Immersion Temperature Sensors
Installation and Operation
Specifications subject to change without notice.
2 of 7
Catalog No. 11-808-632-01
#20907 –
2/20/19
Specifications
Sensor:
Passive,
2 wire
Thermistor
Thermal resistor (NTC)
Temp. Output
Resistance Per Order1
Accu
racy
(std) ±0.36ºF, (±0.2ºC)
Stability
0.036ºF/Year, (<0.02ºC/Year)
Heat dissipation 2.7 mW/ºC
Temp. Drift
<0.02ºC per year
Probe range
-40º to 221ºF (-40º to 105ºC)
Sensitivity
Approximate @ 32ºF (0ºC)
Thermistor
Non-linier
Lead wire
22 AWG stranded
Insulation
Etched Teflon, Plenum rated
Probe
Rigid, 304 Stainless Steel,
0.25” OD
Probe Length
2” or 4”
Mounting
½” NPSM Plastic Threads
Enclosure Types
J-Box (-JB)
With
eight ½” knockouts
BB2 Box
With
three ½” NPSM & three
½”
drill-outs
BB4 Box
With three ½” drill-outs & one ½” open port
Enclosure Ratings
J-Box (-JB)
NEMA 1
BB2 Box
NEMA 4X,
IP66 BB4 Box
IP10
(IP44 with Knockout Plug in the open port)
Enclosure Materials
J-Box (-JB)
Galvanized steel, UL94H-B
BB2 Box
Polycarbonate, UL94V-0, UV rated
BB4 Box
Polycarbonate & Nylon, UL94V-0
Ambient (Encl.)
0 to 100% RH, Non-condensing
BB2 & BB4 Boxes
-40ºF to 185ºF, (-40º to 85ºC)
J-Box & No Box
-40ºF to 212ºF, (-40º to 100ºC)
Agency
RoHS, *CE
JIS C1604-1989
*Thermistors are CE compliant
Thermowells
Thermowells are hollow tubes closed off on one end and threaded at the other end. They are permanently placed into pipes, tanks, or
sumps so that the probes on immersion temperature sensors can be inserted into the pipe. The temperature of the pipe’s contents is
transferred through the wall of the thermowell. The thermowell prevents the pipe’s contents from escaping and maintains the pressure
of pressurized pipes.
Figure 4:
Machined Bar Stock ThermoWell
Part #s
ZSI-T-2-MB
ZSI-T-2-MSS
ZSI-T-4-MB
ZSI-T-4-MSS
ZSI-T-8-MSS
Figure 5:
Two-Part Welded Thermowell
Part #s
ZSI-T-2-WSS
ZSI-T-4-WSS
ZSI-T-8-WSS
