Wells / Immersion Wells / Thermowells

Wells and Thermowells protect temperature sensors in hydronic systems from harsh conditions while ensuring accurate readings. These protective tubes extend sensor life and allow safe maintenance without system shutdown. Jackson Systems stocks Wells in multiple lengths and thread sizes – find the exact fit for your hydronic application today.

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Showing 49–96 of 170 resultsSorted by popularity

Immersion Temperature Sensor, 20K NTC Thermistor, 4″ Probe, 1/2″ NPT

MAMAC

SKU: TE-703-C-17-A-3
$15.10
MSRP: $17.37
You save 15%
MAMAC Systems TE-703-C-17-A-3 Immersion Temperature Sensor, 20K NTC, 4" Probe quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 6″ Probe, NEMA 1

MAMAC

SKU: TE-703-C-12-B-2
$15.10
MSRP: $17.37
You save 15%
MAMAC Systems TE-703-C-12-B-2 Immersion Temperature Sensor, 10K NTC Thermistor quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, 1/4″ NPT

MAMAC

SKU: TE-703-C-12-A-2
$15.10
MSRP: $17.37
You save 15%
MAMAC Systems TE-703-C-12-A-2 Immersion Temperature Sensor, 10K NTC Thermistor quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, NEMA 1

MAMAC

SKU: TE-703-C-12-A-1
$15.10
MSRP: $17.37
You save 15%
MAMAC Systems TE-703-C-12-A-1 Immersion Temperature Sensor, 10K NTC Thermistor, 4" Probe, 1/8" NPT, NEMA 1 quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, 1/4″ NPT

MAMAC

SKU: TE-703-A-12-A-2
$12.94
MSRP: $14.88
You save 15%
MAMAC Systems TE-703-A-12-A-2 Immersion Temperature Sensor, 10K NTC Thermistor quantity
Immersion Temperature Sensor, 0-10Vdc Output, 40-140°F, 4″ SS Probe

MAMAC

SKU: TE-213-C-A-2-B-1C2
$70.94
MSRP: $81.58
You save 15%
MAMAC Systems TE-213-C-A-2-B-1C2 Immersion Temperature Sensor, 0-10Vdc, 40-140°F quantity
Well Thermostat/Outlet Sensor for Lochinvar & A.O. Smith

Lochinvar & A.O. Smith

SKU: 100233695
$40.33
MSRP: $46.38
You save 15%
Lochinvar & A.O. Smith 100233695 Well Thermostat/Outlet Sensor quantity
Bulbwell Replacement Part, SKU 100233613

Lochinvar & A.O. Smith

SKU: 100233613
$39.20
MSRP: $45.08
You save 15%
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Thermostat Well for Water Heater & Boiler Applications

Lochinvar & A.O. Smith

SKU: 100233496
$53.77
MSRP: $61.84
You save 15%
Lochinvar & A.O. Smith 100233496 Thermostat Well quantity
Bulbwell for Thermostat – OEM Replacement Part

Lochinvar & A.O. Smith

SKU: 100233264
$42.56
MSRP: $48.94
You save 15%
Lochinvar & A.O. Smith 100233264 Bulbwell for Thermostat quantity
1/4 in. Bulb Well for Lochinvar & A.O. Smith Equipment

Lochinvar & A.O. Smith

SKU: 100208569
$17.37
MSRP: $19.98
You save 15%
Lochinvar & A.O. Smith 100208569 1/4 in. Bulb Well quantity
1/4″ Immersion Sensor Stat for Boiler & Hydronic Systems

Lochinvar & A.O. Smith

SKU: 100208563
$69.44
MSRP: $79.86
You save 15%
Lochinvar & A.O. Smith 100208563 1/4" Immersion Sensor Stat quantity
Dual Immersion Sensor, Outlet for Boiler Systems

Lochinvar & A.O. Smith

SKU: 100208559
$107.20
MSRP: $123.28
You save 15%
Lochinvar & A.O. Smith 100208559 Dual Immersion Sensor, Outlet quantity
Immersion Inlet Sensor for Lochinvar & A.O. Smith Units

Lochinvar & A.O. Smith

SKU: 100208553
$85.13
MSRP: $97.90
You save 15%
Lochinvar & A.O. Smith 100208553 Immersion Inlet Sensor quantity
Water Temperature Sensor with 11.75″ Lead Wire

Lochinvar & A.O. Smith

SKU: 100208552
$22.41
MSRP: $25.77
You save 15%
Lochinvar & A.O. Smith 100208552 Water Temperature Sensor, 11.75" Lead quantity
Immersion Outlet Sensor for Lochinvar & A.O. Smith Units

Lochinvar & A.O. Smith

SKU: 100208548
$85.13
MSRP: $97.90
You save 15%
Lochinvar & A.O. Smith 100208548 Immersion Outlet Sensor quantity
Inlet Immersion Sensor for Lochinvar & A.O. Smith Units

Lochinvar & A.O. Smith

SKU: 100112940
$63.40
MSRP: $72.91
You save 15%
Lochinvar & A.O. Smith 100112940 Inlet Immersion Sensor quantity
Immersion Temperature Sensor, 4″ Probe, 10K Thermistor, No Well

KMC Controls

SKU: STE-1423
$26.49
MSRP: $30.46
You save 15%
KMC Controls STE-1423 Immersion Temperature Sensor 4" 10K w/o Well quantity
3/4″ NPT Brass Thermowell with 3-1/2″ Immersion Well

Kodiak Controls

SKU: T1E3D2
$10.40
MSRP: $11.96
You save 15%
Kodiak Controls T1E3D2 3/4" NPT Brass Thermowell with 3-1/2" Immersion Well quantity
9″ Dial Thermometer, 3.5″ Stem, 20–180°F Temperature Range

Kodiak Controls

SKU: AS5H-9-20/180-KC
$50.70
MSRP: $58.31
You save 15%
Kodiak Controls AS5H-9-20/180-KC 9" Thermometer, 3.5" Stem, 20-180°F quantity
9″ Dial Thermometer, 3.5″ Stem, 20–180°F Range

Kodiak Controls

SKU: AS5H-9-20/180
$50.70
MSRP: $58.31
You save 15%
Kodiak Controls AS5H-9-20/180 9" Dial Thermometer, 3.5" Stem, 20–180°F quantity
Dual Scale Pressure/Temp Gauge, 0-200 PSI, 70-320°F, 3.25″ Dial

Kodiak Controls

SKU: 4201R-3.25-2-70-KC
$49.98
MSRP: $57.48
You save 13%
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0-200 PSI / 70-320°F Dual Gauge, 1/2″ LO, 2″ Probe

Kodiak Controls

SKU: 4201R-3.25-2-70
$49.98
MSRP: $57.48
You save 13%
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Bulb Well, 2-3/8″ x .299″, 1/2″ OPT, Malleable/Brass, 250°F Max

Johnson Controls

SKU: WZ-1000-5
$54.88
MSRP: $63.11
You save 15%
Read more
Bulb Well, 5-1/4″ x 0.500″, 1/2″ IPT, Stainless Steel, 600°F Max

Johnson Controls

SKU: WZ-1000-4
$386.31
MSRP: $444.26
You save 15%
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Bulb Well, 5-13/16″ x .430″, 1/2″ OD Thread, Brass/Copper Tube

Johnson Controls

SKU: WEL14A-603R
$67.00
MSRP: $77.05
You save 15%
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Bulb Well, 4-15/16″ x .430″, 1/2″ OD Thread, Brass, Copper Tube

Johnson Controls

SKU: WEL14A-602R
$66.20
MSRP: $76.13
You save 15%
Johnson Controls WEL14A-602R Bulb Well, 4-15/16" x .430", 1/2" OD Thread quantity
Bulb Well, 2-3/8″ x .299″, 1/2″ Outside Thread, Brass & Copper

Johnson Controls

SKU: WEL11A-601R
$75.06
MSRP: $86.32
You save 15%
Johnson Controls WEL11A-601R Bulb Well, 2-3/8" x .299", 1/2" OD Thread, Brass/Copper quantity
Well Mount Thermistor, 10K Ohm Resistance, 6″ Probe

Johnson Controls

SKU: TE-636AM-1
$44.06
MSRP: $50.67
You save 15%
Johnson Controls TE-636AM-1 Thermistor, Well Mount, 10K Ohm, 6" Probe quantity
Well Mount Temperature Sensor, 6″ Probe, Platinum Element, 1K Ohm

Johnson Controls

SKU: TE-635AM-2
$32.50
MSRP: $37.38
You save 15%
Johnson Controls TE-635AM-2 Temperature Sensor, Well Mount, 6" Probe, Platinum 1K Ohm quantity
Well Mount Temperature Sensor, 6″ Probe, Nickel Element, 1K Ohm

Johnson Controls

SKU: TE-631AM-2
$34.05
MSRP: $39.16
You save 15%
Johnson Controls TE-631AM-2 Well Mount Temperature Sensor, 6" Probe, Nickel, 1K Ohm quantity
Well Mount Temperature Sensor, 8″ Probe, Nickel 1K Ohm

Johnson Controls

SKU: TE-6312M-1
$36.17
MSRP: $41.60
You save 15%
Johnson Controls TE-6312M-1 Well Mount Temperature Sensor, 8" Probe, Nickel 1K Ohm quantity
Stainless Steel Immersion Well, 8″ Length

Johnson Controls

SKU: TE-6300W-110
$123.64
MSRP: $142.19
You save 15%
Johnson Controls TE-6300W-110 Stainless Steel Well, 8" Length quantity
2.38″ Immersion Thermowell for Temperature Sensing

Johnson Controls

SKU: TE-6300W-103
$42.93
MSRP: $49.37
You save 15%
Johnson Controls TE-6300W-103 2.38" Immersion Thermowell quantity
Stainless Steel Thermowell, 6″ Length, Direct Mount

Johnson Controls

SKU: TE-6300W-102
$103.04
MSRP: $118.50
You save 15%
Johnson Controls TE-6300W-102 Stainless Steel Well, 6" Length, Direct Mount quantity
Brass Thermowell, 6″, Direct Mount with Thermal Grease Included

Johnson Controls

SKU: TE-6300W-101
$38.28
MSRP: $44.02
You save 15%
Johnson Controls TE-6300W-101 Brass Well, 6", Direct Mount with Thermal Grease Included quantity
Platinum Class A Probe, 8″ Length, 1K Ohm RTD Sensor

Johnson Controls

SKU: TE-6300-616
$73.14
MSRP: $84.11
You save 15%
Johnson Controls TE-6300-616 Platinum Class A Probe, 8" Length, 1K Ohm quantity
Nickel Plated Temperature Probe, 3″ Insertion Length

Johnson Controls

SKU: TE-6300-603
$66.05
MSRP: $75.96
You save 15%
Johnson Controls TE-6300-603 Nickel Plated Probe, 3" Length quantity
Nickel Plated Temperature Probe, 8″ Length

Johnson Controls

SKU: TE-6300-601
$70.19
MSRP: $80.72
You save 15%
Johnson Controls TE-6300-601 Nickel Plated Probe, 8" Length quantity
Nickel Temperature Probe, 12″ Cuttable Length

Johnson Controls

SKU: TE-6300-101
$90.29
MSRP: $103.83
You save 15%
Johnson Controls TE-6300-101 Nickel Probe, 12" Length quantity
Insulgrease Thermal Conductive Compound for Hydraulic Element Wells, 8 oz

Johnson Controls

SKU: F-1000-182
$189.38
MSRP: $217.79
You save 15%
Johnson Controls F-1000-182 Insulgrease Thermal Conductive Compound, 8 oz quantity
Utility Thermostat, 120/208/240V, 90–325°F, Manual Reset, Includes Well

Johnson Controls

SKU: A19ADB-31
$209.19
MSRP: $240.57
You save 15%
Johnson Controls A19ADB-31 Utility Thermostat, 120/208/240V, 90–325°F, Manual Reset quantity
Hot Water Immersion Temperature Control, SPST, Manual Reset

Johnson Controls

SKU: A19ADB-2
$154.40
MSRP: $177.56
You save 15%
Johnson Controls A19ADB-2 Hot Water Immersion Temperature Control, SPST quantity
Utility Thermostat, 120/208/240V, 30-180°F, Immersion Bulb w/ Well

Johnson Controls

SKU: A19ABC-39
$172.41
MSRP: $198.27
You save 15%
Johnson Controls A19ABC-39 Utility Thermostat, 120/208/240V, 30-180°F, Immersion Bulb quantity
Hot Water Immersion Temperature Control, SPDT, 1/2″ NPT

Johnson Controls

SKU: A19ABC-12
$172.41
MSRP: $198.27
You save 15%
Johnson Controls A19ABC-12 Hot Water Immersion Temperature Control, SPDT, 1/2" NPT quantity
Hot Water Immersion Temperature Control, SPDT, 1/2″ NPT

Johnson Controls

SKU: A19ABC-11
$154.40
MSRP: $177.56
You save 15%
Johnson Controls A19ABC-11 Hot Water Immersion Temperature Control, SPDT, 1/2" NPT quantity
2.5″ Dial Thermometer with 1/2″ Thermowell Connection

Honeywell Home

SKU: TG250-UT
$19.83
MSRP: $22.80
You save 15%
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Thermometer with Well, 2″ Dial, 32-250°F Range

Resideo

SKU: GT161
$29.73
MSRP: $34.19
You save 15%
Resideo GT161 Thermometer with Well, 2" Dial, 32-250°F quantity

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