ST-U* Series



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ST-U* Series

Precon Universal-Mount Thermistor and RTD Sensors ST-U* Series

Precon Universal-Mount Thermistor and RTD Sensors

 

The Precon Model ST-U Universal Mount Sensor from PreCon provides precise remote temperature sensing in multiple applications such as duct, OSA, and immersion installations for Building Automation Systems, BAS. The active sensing element is a highly stable precision thermistor material or platinum RTD. The sensing element is sealed with a thermally conductive compound in a 4-7/8" (12.38 cm) long stainless steel probe and is attached to a 2.5" (6.35 cm) square enclosure. These sensors have tabs on the enclosure to provide mounting ears for direct duct mounting. They can be easily removed if they are not needed. This multipurpose enclosure minimizes the number of stock parts required to handle multiple applications.


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QtyModelDescriptionIn StockList PriceInternet Price
ST-U11K TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 4-7/8", NO ENCL, NO OUTPUTIn Stock53.0029.68
ST-U11K-XCP25 TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 4-7/8", NO ENCL, NO OUTPUTINFO85.0047.60
ST-U11K-XL16 TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 16", NO ENCL, NO OUTPUTINFO57.0031.92
ST-U11KB TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 4-7/8", NO ENCL, NO OUTPUTIn Stock84.0047.04
ST-U11KB-XP TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 4-7/8", NO ENCL, NO OUTPUTINFO60.0033.60
ST-U11KO TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 4-7/8", OSA SHIELD, NO OUTPUTIn Stock73.0040.88
ST-U11KS TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 4-7/8", NO ENCL, NO OUTPUTIn Stock86.0048.16
ST-U21 TEMP SENSOR, DUCT, 10K TYPE III [11K SHUNT], 4-7/8", NO ENCL, NO OUTPUTINFO45.0025.20
ST-U21B TEMP SENSOR, DUCT, 2.252K, 4-7/8", NO ENCL, NO OUTPUTINFO75.0042.00
ST-U21O TEMP SENSOR, DUCT, 2.252K, 4-7/8", OSA SHIELD, NO OUTPUTINFO65.0036.40
ST-U21S TEMP SENSOR, DUCT, 2.252K, 4-7/8", NO ENCL, NO OUTPUTINFO88.0049.28
ST-U22 TEMP SENSOR, DUCT, 3K, 4-7/8", NO ENCL, NO OUTPUTIn Stock45.0025.20
ST-U22-XL9 TEMP SENSOR, DUCT, 3K, 9", NO ENCL, NO OUTPUTINFO45.0025.20
ST-U22-XP TEMP SENSOR, DUCT, 3K, 4-7/8", NO ENCL, NO OUTPUTINFO52.0029.12
ST-U22B TEMP SENSOR, DUCT, 3K, 4-7/8", NO ENCL, NO OUTPUTIn Stock75.0042.00
ST-U22O TEMP SENSOR, DUCT, 3K, 4-7/8", OSA SHIELD, NO OUTPUTIn Stock65.0036.40
ST-U22S TEMP SENSOR, DUCT, 3K, 4-7/8", NO ENCL, NO OUTPUTIn Stock88.0049.28
ST-U24 TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTIn Stock41.0022.96
ST-U24-QD1/4 TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTINFO48.0026.88
ST-U24-XCP25 TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTINFO78.0043.68
ST-U24-XD TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTINFO64.0035.84
ST-U24-XG TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTINFO57.0031.92
ST-U24-XL12 TEMP SENSOR, DUCT, 10K TYPE II, 12", NO ENCL, NO OUTPUTINFO57.0031.92
ST-U24-XL2IN TEMP SENSOR, DUCT, 10K TYPE II, 2", NO ENCL, NO OUTPUTINFO45.0025.20
ST-U24-XL9 TEMP SENSOR, DUCT, 10K TYPE II, 9", NO ENCL, NO OUTPUTINFO45.0025.20
ST-U24-XN2 TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTINFO86.0048.16
ST-U24-XP TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTINFO105.0058.80
ST-U24B TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTIn Stock75.0042.00
ST-U24B-XP TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", OSA SHIELD, NO OUTPUTINFO90.0050.40
ST-U24O TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", OSA SHIELD, NO OUTPUTIn Stock65.0036.40
ST-U24S TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTIn Stock88.0049.28
ST-U24S-XP TEMP SENSOR, DUCT, 10K TYPE II, 4-7/8", NO ENCL, NO OUTPUTINFO73.0040.88
ST-U27 TEMP SENSOR, DUCT, 100K, 4-7/8", NO ENCL, NO OUTPUTINFO45.0025.20
ST-U27B TEMP SENSOR, DUCT, 100K, 4-7/8", NO ENCL, NO OUTPUTINFO75.0042.00
ST-U27O TEMP SENSOR, DUCT, 100K, 4-7/8", OSA SHIELD, NO OUTPUTINFO65.0036.40
ST-U27S TEMP SENSOR, DUCT, 100K, 4-7/8", NO ENCL, NO OUTPUTINFO88.0049.28
ST-U3 TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTIn Stock45.0025.20
ST-U3-QD1/4 TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTINFO48.0026.88
ST-U3-X25 TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTINFO55.0030.80
ST-U3-XC25 TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTINFO84.0047.04
ST-U3-XG TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTINFO57.0031.92
ST-U3-XL12 TEMP SENSOR, DUCT, 10K TYPE III, 12", NO ENCL, NO OUTPUTINFO49.0027.44
ST-U3-XL16 TEMP SENSOR, DUCT, 10K TYPE III, 16", NO ENCL, NO OUTPUTINFO50.0028.00
ST-U3-XL18 TEMP SENSOR, DUCT, 10K TYPE III, 18", NO ENCL, NO OUTPUTIn Stock50.0028.00
ST-U3-XL2.5 TEMP SENSOR, DUCT, 10K TYPE III, 2.5", NO ENCL, NO OUTPUTINFO52.0029.12
ST-U3-XL2IN TEMP SENSOR, DUCT, 10K TYPE III, 2", NO ENCL, NO OUTPUTINFO45.0025.20
ST-U3-XL9 TEMP SENSOR, DUCT, 10K TYPE III, 9", NO ENCL, NO OUTPUTIn Stock45.0025.20
ST-U3-XN TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTINFO52.0029.12
ST-U3-XP TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTINFO52.0029.12
ST-U3B TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTIn Stock75.0042.00
ST-U3B-XP TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", OSA SHIELD, NO OUTPUTINFO63.0035.28
ST-U3O TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", OSA SHIELD, NO OUTPUTIn Stock65.0036.40
ST-U3S TEMP SENSOR, DUCT, 10K TYPE III, 4-7/8", NO ENCL, NO OUTPUTIn Stock88.0049.28
ST-U42 TEMP SENSOR, DUCT, 20K, 4-7/8", NO ENCL, NO OUTPUTIn Stock45.0025.20
ST-U42-XL9 TEMP SENSOR, DUCT, 20K, 9", NO ENCL, NO OUTPUTINFO45.0025.20
ST-U42-XP TEMP SENSOR, DUCT, 20K, 4-7/8", NO ENCL, NO OUTPUTINFO52.0029.12
ST-U42B TEMP SENSOR, DUCT, 20K, 4-7/8", NO ENCL, NO OUTPUTIn Stock75.0042.00
ST-U42O TEMP SENSOR, DUCT, 20K, 4-7/8", OSA SHIELD, NO OUTPUTIn Stock65.0036.40
ST-U42S TEMP SENSOR, DUCT, 20K, 4-7/8", NO ENCL, NO OUTPUTIn Stock88.0049.28
ST-U63 TEMP SENSOR, DUCT, 1K NI RTD, 4-7/8", NO ENCL, NO OUTPUTINFO135.0075.60
ST-U71 TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO363.00203.28
ST-U81 TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO95.0053.20
ST-U81-XZ TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO109.0061.04
ST-U81B TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO142.0079.52
ST-U81O TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", OSA SHIELD, NO OUTPUTINFO127.0071.12
ST-U81S TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO163.0091.28
ST-U85 TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTIn Stock95.0053.20
ST-U85-QD1/4 TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO98.0054.88
ST-U85-XD TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO145.0081.20
ST-U85-XL9 TEMP SENSOR, DUCT, 100 RTD 385, 9", NO ENCL, NO OUTPUTINFO95.0053.20
ST-U85-XP TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO106.0059.36
ST-U85B TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTIn Stock142.0079.52
ST-U85O TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", OSA SHIELD, NO OUTPUTIn Stock127.0071.12
ST-U85S TEMP SENSOR, DUCT, 100 RTD 385, 4-7/8", NO ENCL, NO OUTPUTIn Stock163.0091.28
ST-U91 TEMP SENSOR, DUCT, 1K RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO95.0053.20
ST-U91-XD TEMP SENSOR, DUCT, 1K RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO145.0081.20
ST-U91-XL2IN TEMP SENSOR, DUCT, 1K RTD 385, 2", NO ENCL, NO OUTPUTINFO95.0053.20
ST-U91-XP TEMP SENSOR, DUCT, 1K RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO106.0059.36
ST-U91B TEMP SENSOR, DUCT, 1K RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO142.0079.52
ST-U91O TEMP SENSOR, DUCT, 1K RTD 385, 4-7/8", OSA SHIELD, NO OUTPUTINFO127.0071.12
ST-U91S TEMP SENSOR, DUCT, 1K RTD 385, 4-7/8", NO ENCL, NO OUTPUTINFO163.0091.28

Accessories

No accessories found
Features
  • Lifetime warranty
  • Flame retardant, plenum rated
  • Wide selection of thermistor and RTD curves
  • Adaptable with many mounting options
  • 304 stainless steel probes
  • Easy to mount to duct, well, or wall
  • Waterproof probe
  • Paintable plastic
  • NEMA 3R, IP22
  • Brass or stainless well
  • Outside air kit
  • Custom lengths
  • Matched sensor pairs
  • Ultra high accuracy optional
Specifications

Accuracy:

Thermistor: ±0.36℉ (0.2℃)

RTD:

Type 63: ±0.72℉ (0.40℃)

Type 71: +/-0.0774°F (0.043°C)

Type 81, 85: ±0.27℉ (0.15℃)

Type 91: ±0.54℉ (0.30℃)

Sensor Type:

Thermistor: 2.252 kΩ, 3 kΩ, 10 kΩ Type II, III & III w/11K shunt, 20 kΩ, 100 kΩ

RTD:

Type 63: 1000Ω Nickel

Type 71, 81: 100Ω Pt 385 Curve

Type 85: 1000Ω Pt 385 Curve

Type 91 :1000Ω Pt 375 Curve

Temperature Range:

Thermistor/RTD: -40° to 221℉ (-40° to 105℃)

Temperature Coefficient:

Thermistor: Negative temperature coefficient

RTD: Positive temperature coefficient

Temperature Stability:

Thermistor: 0.24℉ (0.13℃) over five years

RTD: Max 0.04% after 1k hours @ 500 ℃

Heat Dissipation: 2.7 mW/℃ (power needed to raise the temperature by 1℃)

Enclosure Rating: NEMA 3R, UL 94V-0, plenum-rated plastic, IP22 UV protected with snap-off cover

Mounting: Directly to duct, immersion well, or OSA wall mount with appropriate bracket

Wiring Terminations: 8' (2.4m) of 24 AWG pigtails with prestripped ends, type 71 & 81 have 18" leads

Weight: 0.25 lb (0.1 Kg) w/o options

Approvals: CE

Warranty: Lifetime

Certifications




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