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 184 resultsSorted by popularity

Immersion Temperature Sensor, 4-20mA, 20°F–70°F, 2.5″ Probe

Siemens

SKU: 536-774-25
$129.98
MSRP: $149.48
You save 15%
Siemens Building Technology 536-774-25 Immersion Temperature Sensor, 4-20mA quantity
Immersion Temperature Sensor, 4-20mA, 30-250°F, 2.5″ Probe w/ Thermowell

Siemens

SKU: 536-767-25
$129.94
MSRP: $149.43
You save 15%
Siemens 536-767-25 Immersion Temperature Sensor, 4-20mA, 30-250°F, 2.5" Probe quantity
Aquastat Limit Control with 3/4″ Immersion Well

Peerless Boiler

SKU: 50535
$377.01
MSRP: $433.56
You save 15%
Peerless Boiler 50535 Aquastat Limit Control with 3/4" Immersion Well quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, NEMA 4

MAMAC

SKU: TE-703-D-7-A-1
$29.25
MSRP: $33.64
You save 15%
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Immersion Temperature Sensor, 4″ Probe, 20K NTC, NEMA 4 Enclosure

MAMAC

SKU: TE-703-D-17-A-1
$29.25
MSRP: $33.64
You save 15%
MAMAC Systems TE-703-D-17-A-1 Immersion Temperature Sensor, 4" Probe, NEMA 4 quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, NEMA 4

MAMAC

SKU: TE-703-D-12-A-3
$29.25
MSRP: $33.64
You save 15%
MAMAC Systems TE-703-D-12-A-3 Immersion Temperature Sensor, 10K NTC Thermistor, 4" Probe, NEMA 4 quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, NEMA 4

MAMAC

SKU: TE-703-D-12-A-2
$29.25
MSRP: $33.64
You save 15%
MAMAC Systems TE-703-D-12-A-2 Immersion Temperature Sensor, 10K NTC Thermistor, 4" Probe, NEMA 4 quantity
Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, 1/4″ NPT

MAMAC

SKU: TE-703-C-7-A-2
$16.60
MSRP: $19.09
You save 15%
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Immersion Temperature Sensor, 10K NTC Thermistor, 4″ Probe, NEMA 1

MAMAC

SKU: TE-703-C-7-A-1
$16.60
MSRP: $19.09
You save 15%
MAMAC Systems TE-703-C-7-A-1 Immersion Temperature Sensor, 10K NTC Thermistor, 4" Probe quantity
Immersion Temperature Sensor, 1,000 Ohm Pt RTD, 4″ Probe, 1/4″ NPT

MAMAC

SKU: TE-703-C-3-A-2
$18.67
MSRP: $21.47
You save 15%
MAMAC Systems TE-703-C-3-A-2 Immersion Temperature Sensor, 1,000 Ohm Pt RTD quantity
Immersion Temperature Sensor, 20K NTC Thermistor, 4″ Probe, 1/2″ NPT

MAMAC

SKU: TE-703-C-17-A-3
$16.60
MSRP: $19.09
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
$16.60
MSRP: $19.09
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
$16.60
MSRP: $19.09
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
$16.60
MSRP: $19.09
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
$14.24
MSRP: $16.38
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
$75.48
MSRP: $86.80
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%
Lochinvar & A.O. Smith 100233613 Bulbwell quantity
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%
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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
$22.49
MSRP: $25.86
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
$31.50
MSRP: $36.23
You save 15%
KMC Controls STE-1423 Immersion Temperature Sensor 4" 10K w/o Well quantity
10K Type 2 Immersion Temp Sensor, 4-In Stem, Weatherproof

Kele

SKU: BA/10K2-I-4-WP
$33.27
MSRP: $38.26
You save 15%
Kele BA/10K2-I-4-WP 10K Type 2 Immersion Temperature Sensor, Weatherproof quantity
3/4″ NPT Brass Thermowell with 3-1/2″ Immersion Well Depth

Kodiak Controls

SKU: T1E3D2-KC
$10.40
MSRP: $11.96
You save 13%
Kodiak Controls T1E3D2 3/4" NPT Brass Thermowell 3-1/2" Immersion 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, 30–240°F Range

Kodiak Controls

SKU: AS5H-9-30/240
$50.70
MSRP: $58.31
You save 15%
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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%
Kodiak Controls 4201R-3.25-2-70-KC Dual Scale Pressure/Temp Gauge 0-200 PSI 70-320°F quantity
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%
Kodiak Controls 4201R-3.25-2-70 0-200 PSI / 70-320°F Dual Gauge, 1/2" LO, 2" Probe quantity
Dual-Scale Gauge 0/100 PSI, 70/320°F, 1/2″ Back, 2″ Stem

Kodiak Controls

SKU: 4104-3.25-2-70
$40.46
MSRP: $46.53
You save 13%
Kodiak Controls 4104-3.25-2-70 Dual-Scale Gauge 0/100 PSI 70/320°F 1/2" Back 2" Stem quantity
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%
Johnson Controls WZ-1000-5 Bulb Well, 2-3/8" x .299", 1/2" OPT, Malleable/Brass, 250°F Max quantity
Bulb Well, 5-1/4″ x 0.500″, 1/2″ IPT, Stainless Steel, 600°F Max

Johnson Controls

SKU: WZ-1000-4
$405.63
MSRP: $466.47
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, 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%
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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

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