Test Instruments

Test instruments are essential tools for accurate diagnostics in the field, helping technicians and homeowners stay safe while fine-tuning equipment. Achieve precise measurements with top-quality products such as voltage testers, static pressure kits, water hardness test strips, infrared thermometers, and pocket-sized thermometers. Our instruments offer convenient features like data hold, auto power-off, integrated storage, circular laser targeting, and built-in work lights. Explore a wide selection of trusted brands, including UEi Test Instruments, MA-Line, and Klein Tools, available now at Jackson Systems & Supply for all your testing needs!

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Showing 241–288 of 497 resultsSorted by popularity

Class 1000 Electric Meter, Steel Enclosure, 3W, 208V, 200 Amp

Honeywell Home

SKU: E10-3208200-JKIT
$716.43
MSRP: $823.89
You save 15%
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Class 1000 Electric Meter, Steel Enclosure, 3-Wire, 208V, 100 Amp

Honeywell Home

SKU: E10-3208100-JKIT
$716.43
MSRP: $823.89
You save 15%
Honeywell E10-3208100-JKIT Class 1000 Meter, Steel Enclosure, 3W, 208V, 100A quantity
Sight Glass for Hydrotherm Boiler Systems

Hydrotherm

SKU: 60-4280
$15.10
MSRP: $17.37
You save 15%
Hydrotherm 60-4280 Sight Glass quantity
Type J Thermocouple Assembly for Accurate Temperature Sensing

Preferred Instruments

SKU: 104087D
$252.85
MSRP: $290.78
You save 15%
Preferred Instruments 104087D Type J Thermocouple Assembly quantity
8-3/8″ XH Redline Gauge Glass Replacement

Fujitsu

SKU: 2-12-000065
$119.00
MSRP: $136.85
You save 15%
Fujitsu 2-12-000065 8-3/8" XH Redline Gauge Glass quantity
1/4″ NC Multi-Media Pressure Gauge – 0-185 PSI Air/Water/Oil

Enerco

SKU: 21872
$121.83
MSRP: $140.10
You save 15%
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0-30 PSI Digital Pressure Gauge

Dwyer

SKU: DPG-003
$373.63
MSRP: $429.67
You save 15%
Dwyer DPG-003 0-30 PSI Digital Pressure Gauge quantity
Differential Pressure Transducer, 0–0.25″ w.c. Range

Dwyer

SKU: DM-002
$184.69
MSRP: $212.39
You save 15%
Dwyer DM-002 Differential Pressure Transducer 0-0.25" w.c. quantity
Pressure Gauge 0-2″ WC 1/8″ FPT Low Pressure

Dwyer

SKU: 2002-LT
$118.44
MSRP: $136.21
You save 15%
Dwyer 2002-LT Pressure Gauge 0-2" WC 1/8" FPT Low Pressure quantity
Wet Switch Flood Detector for HVAC Condensate Protection

DiversiTech

SKU: WS-1C
$120.18
MSRP: $138.21
You save 15%
DiversiTech WS-1C Wet Switch Flood Detector quantity
Sight Glass Replacement Part for ICP Systems

International Comfort Products

SKU: 1150984
$59.75
MSRP: $68.71
You save 15%
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1/2″ USG 15 Direct Read Oil Meter, Direct Read Display

Honeywell Home

SKU: OIL92139
$1,891.23
MSRP: $2,174.91
You save 15%
Honeywell Elster AMCO OIL92139 1/2" USG 15 Direct Read Oil Meter quantity
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
Window Plug Sight Glass for Power Flame Burners

Power Flame Burners

SKU: 931243
$5.66
MSRP: $6.51
You save 15%
Power Flame Burners 931243 Window Plug Sight Glass quantity
Drain Pan Overflow Switch for HVAC Condensate Protection

First Company

SKU: SS3
$61.01
MSRP: $70.16
You save 15%
First Company SS3 Drain Pan Overflow Switch quantity
1/4″ Female x Male Flare 650 PSI Moisture Indicator, AMI-1FM2

US Motors

SKU: 5430
$23.44
MSRP: $26.96
You save 15%
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Water Leak Detector, Line Powered, DPDT Relay, 11–27 Vac/DC

Dwyer

SKU: WD3-LP-D2-A
$78.56
MSRP: $90.34
You save 15%
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Line Powered Leak Detector with Dual-Zone Detection

Dwyer

SKU: WD3-LP-D2-10
$79.68
MSRP: $91.63
You save 15%
Dwyer WD3-LP-D2-10 Line Powered Leak Detector quantity
Tridicator Gage, 0–200 PSI Range, 1/2″ NPT Center Back Mount

Dwyer

SKU: TRI-200-50
$102.48
MSRP: $117.85
You save 15%
Dwyer TRI-200-50 Tridicator Gage, 0–200 PSI, 1/2" NPT Center Back Mount quantity
Tridicator Gage, 0–100 PSI Range, 1/4″ NPT Center Back Mount

Dwyer

SKU: TRI-100-25E
$119.55
MSRP: $137.48
You save 15%
Dwyer TRI-100-25E Tridicator Gage, 0–100 PSI, 1/4" NPT Center Back Mount quantity
Temperature/Process Indicator, PTC Thermistor Input, 110 VAC

Dwyer

SKU: TID-1110
$80.50
MSRP: $92.58
You save 15%
Dwyer TID-1110 Temperature/Process Indicator, PTC Thermistor Input, 110 VAC quantity
Sight Flow Indicator, 3/4″ Body, Double Window, 200°F Limit

Dwyer

SKU: SFI-300-3/4
$339.43
MSRP: $390.34
You save 15%
Dwyer SFI-300-3/4 Sight Flow Indicator, 3/4" Body, Double Window quantity
Sight Flow Indicator, 1/2″ Body, Tempered Glass Window, 200°F Limit

Dwyer

SKU: SFI-100-1/2
$249.42
MSRP: $286.83
You save 15%
Dwyer SFI-100-1/2 Sight Flow Indicator, 1/2" Body, Tempered Glass Window quantity
Averaging Flow Sensor, 7-21/32″ Insertion, 1/4″ ID, 3/8″ OD

Dwyer

SKU: PAFS-1004
$21.79
MSRP: $25.06
You save 15%
Dwyer PAFS-1004 Averaging Flow Sensor, 7-21/32" Insertion, 1/4" ID, 3/8" OD quantity
Averaging Flow Sensor, 3-5/32″ Insertion, Air & Compatible Gases

Dwyer

SKU: PAFS-1002
$14.73
MSRP: $16.94
You save 15%
Dwyer PAFS-1002 Averaging Flow Sensor, 3-5/32" Insertion, 1/4" ID, 3/8" OD quantity
Wall Transmitter, 10/15/25/28″ WC Ranges, LCD Display

Dwyer

SKU: MSX-W13-IN-LCD
$203.53
MSRP: $234.06
You save 15%
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4-20mA Differential Pressure Transmitter with LCD Display

Dwyer

SKU: MSX-W10-IN-LCD
$203.53
MSRP: $234.06
You save 15%
Dwyer MSX-W10-IN-LCD 4-20mA Differential Pressure Transmitter with LCD quantity
Low Pressure Gage, 0–15″ W.C., 2-1/2″ Face, 1/4″ Male NPT

Dwyer

SKU: LPG4-D8122N
$100.58
MSRP: $115.67
You save 15%
Read more
Low Pressure Gage, 0-15″ W.C., 2-1/2″ Face, 1/4″ NPT

Dwyer

SKU: LPG3-D8122N
$122.68
MSRP: $141.08
You save 15%
Dwyer LPG3-D8122N Low Pressure Gage, 0-15" W.C., 2-1/2" Face, 1/4" NPT quantity
Polycarbonate Flowmeter, 2–20 GPM Water, 1″ Male NPT, SS Float

Dwyer

SKU: LFME-13-F2
$234.99
MSRP: $270.24
You save 15%
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Plastic Flow Meter, 1″ NPT, 3–30 GPM / 11–113 LPM Range

Dwyer

SKU: HFPC-3-4
$417.38
MSRP: $479.99
You save 15%
Dwyer HFPC-3-4 Plastic Flow Meter, 1" NPT, 3–30 GPM / 11–113 LPM quantity
0-100 PSI Digital Pressure Gauge

Dwyer

SKU: DPGA-08
$167.80
MSRP: $192.97
You save 15%
Dwyer DPGA-08 0-100 PSI Digital Pressure Gauge quantity
Digihelic Differential Pressure Controller, 0-25″ w.c.

Dwyer

SKU: DHII-008
$1,181.13
MSRP: $1,358.30
You save 15%
Dwyer DHII-008 Digihelic Differential Pressure Controller, 0-25" w.c. quantity
Current / Voltage Signal Generator

Dwyer

SKU: CSG
$341.89
MSRP: $393.17
You save 15%
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Analog Signal Generator, Ramp Function, Bar Graph LED, 0-20mA/0-10Vdc

Dwyer

SKU: ASG
$377.45
MSRP: $434.07
You save 15%
Dwyer ASG Analog Signal Generator, Ramp Function, Bar Graph LED, 0-20mA/0-10Vdc quantity
Photohelic Pressure Switch/Gage, 0-10.0″ W.C., 4″ Dial Face

Dwyer

SKU: A3010
$784.69
MSRP: $902.39
You save 15%
Dwyer A3010 Photohelic Pressure Switch/Gage, 0-10.0" W.C., 1/8" FNPT quantity
Photohelic Pressure Switch/Gage, 0-2.0″ W.C., 1/8″ FNPT, 4″ Dial

Dwyer

SKU: A3002
$784.69
MSRP: $902.39
You save 15%
Dwyer A3002 Photohelic Pressure Switch/Gage, 0-2.0" W.C., 1/8" FNPT, 4" Dial quantity
Static Pressure Tip, 4″ Straight with Mounting Flange

Dwyer

SKU: A-489
$14.12
MSRP: $16.24
You save 15%
Dwyer A-489 Static Pressure Tip, 4" Straight with Mounting Flange quantity
Static Pressure Tip for Duct & Airflow Measurement

Dwyer

SKU: A-421
$54.03
MSRP: $62.13
You save 15%
Dwyer A-421 Static Pressure Tip for Duct & Airflow Measurement quantity
Mounting Bracket for Magnehelic Differential Pressure Gage

Dwyer

SKU: A-369
$28.48
MSRP: $32.75
You save 15%
Dwyer A-369 Bracket For Magnehelic Gage quantity
Aspirator Bulb for Accurate Air Sampling

Dwyer

SKU: A-350
$35.90
MSRP: $41.29
You save 15%
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6″ Hook Style Static Tip Assembly for Air Velocity Measurement

Dwyer

SKU: A-302F-B
$25.03
MSRP: $28.78
You save 15%
Dwyer A-302F-B 6" Hook Style Static Tip Assembly | SKU: A-302F-B quantity
Differential Pressure Transmitter, 0-2″ w.c., 4-20mA Output

Dwyer

SKU: 616KD-01
$131.45
MSRP: $151.17
You save 15%
Dwyer 616KD-01 Differential Pressure Transmitter, 0-2" w.c., 4-20mA quantity
Differential Pressure Indicating Transmitter, 0–3.0″ w.c.

Dwyer

SKU: 605-3
$550.28
MSRP: $632.82
You save 15%
Dwyer 605-3 Differential Pressure Indicating Transmitter, 0–3.0" w.c. quantity
0-100 PSI Digital Manometer Kit with Accessories

Dwyer

SKU: 490A-4-HKIT
$3,329.39
MSRP: $3,828.80
You save 15%
Dwyer 490A-4-HKIT 0-100 PSI Digital Manometer Kit quantity
Swing Vane Vaneometer, 25 to 400 FPM Range

Dwyer

SKU: 480
$62.70
MSRP: $72.11
You save 15%
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Intrinsically Safe Handheld Digital Manometer, 0-200″ w.c.

Dwyer

SKU: 475-3-FM
$357.34
MSRP: $410.94
You save 15%
Dwyer 475-3-FM Handheld Digital Manometer, Intrinsically Safe, 0-200" w.c. quantity
Handheld Digital Manometer, Intrinsically Safe, 0-40″ w.c.

Dwyer

SKU: 475-2-FM
$357.34
MSRP: $410.94
You save 15%
Dwyer 475-2-FM Handheld Digital Manometer, Intrinsically Safe, 0-40" w.c. quantity

Test Instruments

Brand

Category

Voltage

Temperature

Brand

Category

Voltage

Temperature