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UNRESTRICTED
ON-931-Series
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Bolt-On Thermistor Sensor with Aluminum Flag Housing
Omega's two-wire ON-931 sensor features an improved
housing design and increased gauge duplex wire which
gives improved strain relief and pull strength. The bolt
hole accepts #3 and #4 screws, and other screw sizes are
available. These can be installed on flat surfaces by
either being bolted or cemented onto the surface.
Applications for this type of sensor include product
performance testing; climate control/HVAC; printed
circuit board manufacturing and cable manufacturing;
environmental chamber temperature measurement.
Features
• Redesigned housing for improved strain relief
• Duplex wire now used for better wire protection
• Standard hole for #3 and #4 screw. #5, #6, and #8
screw sizes also available
• Small aluminum housing allows for installation on most flat surfaces
• Sensor can be bolted or cemented into place
• Accuracy is up to ± 0.1°C
• Temperature range is -80 to 100°C
• Resistance value: 2252, 3000, 5000, 10,000 or 30,000 Ohms
• Stripped ends standard, with phone plug connector available
Specifications
Process Temperature Range
-80 to 100°C
Resistance and Accuracy
2252, 3000, 5000, 10,000 and 30,000 Ohms
Accuracy is ± 0.1°C or 0.2°C
Connection Type
Stripped ends. Phone plug available (add “-PP” as suffix)
Dimensions and mounting
screw
Barrel dimensions: 0.562 in. by 0.190 in.
Mounting body dimension: 0.31 in. x 0.31 in.
Screw sizes: #3 and #4 standard; other holes sizes available for #5, #6 and #8
Cable length
40 inches, with longer lengths available
Cable material
PFA coated duplex, 26 AWG
Mounting Style
Bolt-on or Cement-on
Ordering Example: ON-931-44004-40 Surface Thermistor probe with 2252 Ω thermistor element, with
0.116 in. hole for #3 or #4 screw. 40-inch PFA-coated leads, stripped ends.
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UNRESTRICTED
ON-931-Series
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ON-931 Available Resistances
Resistance Suffix
Range and Accuracy
Resistance Value
-44004
-80 to 100°C, ± 0.2°C
2252 Ω
-44005
-80 to 100°C, ± 0.2°C
3000 Ω
-44006
-80 to 100°C, ± 0.2°C
10,000 Ω
-44007
-80 to 100°C, ± 0.2°C
5000 Ω
-44008
-80 to 100°C, ± 0.2°C
30,000 Ω
-44033
-80 to 75°C, ± 0.1°C
2252 Ω
-44030
-80 to 75°C, ± 0.1°C
3000 Ω
-44034
-80 to 75°C, ± 0.1°C
5000 Ω
-44031
-80 to 75°C, ± 0.1°C
10,000 Ω
-44032
-80 to 75°C, ± 0.1°C
30,000 Ω
ON-931 Screw size Designation
Screw Size Suffix
Hole Dimension
Screw size
None
0.116 in.
#3 and #4
-H147
0.147 in.
#5 and #6
-H170
0.170 in.
#8
Ordering Example: ON-931-44033-40-H147: Surface Thermistor probe with 2252-ohm high accuracy
thermistor element, with 0.147 in. hole for #5 and #6 screw, 40 in. leads and stripped ends
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UNRESTRICTED
ON-931-Series
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DRAWING
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