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 49–96 of 497 resultsSorted by popularity

Digital Capacitor Value Measurement Tool

Supco

SKU: MFD10
$67.15
MSRP: $77.22
You save 15%
Supco MFD10 Digital Capacitor Tester quantity
Water Leak & Freeze Detector

Kidde

SKU: 60WLDR-W
$34.97
Kidde 60WLDR-W Water Leak & Freeze Detector quantity
Job Link Flex Psychrometer Probe

Fieldpiece

SKU: JL3RH
$157.13
Fieldpiece JL3RH Job Link System Psychrometer Probe with Flexible Wand quantity
Expandable Manual Ranging Stick Multimeter for HVAC/R

Fieldpiece

SKU: HS33
$208.25
Fieldpiece HS33 Expandable Multimeter with K-Type Thermocouple quantity
Cable Tester Kit W/ Scout Pro 3, Remotes, Adapter, Battery

Klein Tools

SKU: VDV501-851
$99.98
Klein Tools VDV501-851 Scout Pro 3 Tester Starter Kit quantity
5-50V AC/DC Twin Testleads (SE)

MA-Line

SKU: MA-8202A
$7.62
MSRP: $8.77
You save 15%
MA-Line MA-8202A 5-50V AC/DC Twin Testleads (SE) quantity
Digital Mini Auto-Ranging Clamp-On Meter

MA-Line

SKU: MA-3268R
$45.19
MSRP: $51.97
You save 15%
MA-Line MA-3268R Digital Mini Auto-Ranging Clamp-On Multimeter quantity
Rope Water Sensor for Leak Detection

Rheem

SKU: AP16678
$26.56
MSRP: $30.54
You save 15%
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Motor Testing Tool for Nordyne HVAC Systems

Nordyne

SKU: 921767
$70.79
MSRP: $81.41
You save 15%
Nordyne 921767 Motor Testing Tool quantity
Flow Meter for NTI Boiler Systems

NTI Boiler

SKU: 64980195
$55.78
MSRP: $64.15
You save 15%
NTI Boiler 64980195 Flow Meter quantity
Inverter Checker for Mitsubishi Mini-Split Systems

Mitsubishi

SKU: T2WEA0988
$119.89
MSRP: $137.87
You save 13%
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Sight Glass Assembly for HTP Boiler Systems

HTP

SKU: 7855P-401
$20.54
MSRP: $23.62
You save 15%
HTP 7855P-401 Sight Glass Assembly quantity
DiversiTech 14250 Smokeys Smoke Emitter Cartridge

DiversiTech

SKU: 14250
$54.99
MSRP: $63.24
You save 13%
DiversiTech 14250 Smokeys Smoke Emitter Cartridges – 2-1/2 Minute Burn Time, 1,100 Cu. Ft. Coverage, Pack of 5 quantity
Combustion Analyzer with HydroCycle

Fieldpiece

SKU: CAT85
$1,870.76
Fieldpiece CAT85 Combustion Analyzer with HydroCycle quantity
Fast-Reaction Carbon Monoxide Detector

Fieldpiece

SKU: SCM4
$321.30
Fieldpiece SCM4 Fast-Reaction Carbon Monoxide CO Detector quantity
20:1 Dual-Laser Infrared Thermometer

Klein Tools

SKU: IR10
$119.99
Klein Tools IR10 20:1 Dual-Laser Infrared Thermometer quantity
Multi-Function Insulation Resistance Tester

Klein Tools

SKU: ET600
$199.97
Klein ET600 Multi-Function Megohmeter quantity
Sale!
Snap On Valve Controller, No Tools Required

LeakSmart

SKU: LS8852000

$349.00Add to Cart for Savings

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True RMS DC/AC Clamp on Hand-held Meter

MA-Line

SKU: MA-TRMS600
$94.60
MSRP: $108.79
You save 15%
MA-Line MA-TRMS600 True RMS Clamp on Meter quantity
Sensepoint XCD Combustible Gas Detector Calibration Kit

Honeywell Home

SKU: XCDCOMBKIT
$755.31
MSRP: $868.61
You save 15%
Honeywell Analytics XCDCOMBKIT Sensepoint XCD Combustible Calibration Kit quantity
Leak Breaker Sensor for Hydronic System Protection

Taco Comfort Solutions

SKU: 7240-LB1
$28.66
MSRP: $32.96
You save 15%
Taco Comfort Solutions 7240-LB1 Leak Breaker Sensor quantity
Filter Drier 7/8″ with Integrated Sight Glass

Sporlan Controls

SKU: 409997
$187.04
MSRP: $215.10
You save 15%
Sporlan Controls 409997 CSG-307-S Filter Drier 7/8" with Sight Glass quantity
T&P Gauge, 70-250°F / 0-90 PSI, 1/2″ Bottom Connection

Raypak

SKU: 007205F
$60.28
MSRP: $69.32
You save 15%
Raypak 007205F T&P Gauge, 70-250°F / 0-90 PSI, 1/2" Bottom Connection quantity
Mini-Split Service Tool for Mitsubishi Systems

Mitsubishi

SKU: PAC-SK52ST
$165.35
MSRP: $190.15
You save 15%
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Sight Glass Kit for Boiler & Hydronic Systems

Lochinvar & A.O. Smith

SKU: 100311165
$143.84
MSRP: $165.42
You save 15%
Lochinvar & A.O. Smith 100311165 Sight Glass Kit quantity
Differential Pressure Transmitter with LCD Display

Dwyer

SKU: MSX-U12-IN-LCD
$236.44
MSRP: $271.91
You save 15%
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Magnehelic Differential Pressure Gage, Dual Scale Air Velocity

Dwyer

SKU: 2001AV
$110.33
MSRP: $126.88
You save 15%
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Wireless Service Tool for Carrier HVAC Systems

Carrier

SKU: AWSTCWS01
$221.11
MSRP: $254.28
You save 15%
Carrier AWSTCWS01 Wireless Service Tool quantity
2.5″ Combination T&P Gauge, 0–75 PSI / 70–320°F

Burnham Boiler

SKU: 100282-03
$106.95
MSRP: $122.99
You save 15%
Burnham Boiler 100282-03 2.5" T&P Gauge 0–75 PSI / 70–320°F quantity
5/8″ OD Red Line Gauge Glass, 12″ Length – 12-Pack

Auburn

SKU: H4-12-12PK
$300.98
MSRP: $346.13
You save 15%
Auburn H4-12-12PK 5/8" OD Red Line Gauge Glass 12" – 12-Pack quantity
Modular service tool designed for AAON HVAC equipment

AAON

SKU: ASM01895
$1,167.34
MSRP: $1,342.44
You save 15%
AAON ASM01895 Modular Service Tool quantity
Portable Carrying Case Kit for Magnehelic Gauges

Dwyer

SKU: A-432
$107.95
MSRP: $124.14
You save 15%
Dwyer A-432 Portable Carrying Case Kit for Magnehelic Gauges quantity
Sauermann 27496 Si-CA 030 2AS Gas Analyzer Kit, O2/CO Sensors, 7 Probe, Vinyl Carrying Case

Sauermann

SKU: 27496
$895.99
MSRP: $1,030.39
You save 15%
Sauermann 27496 Si-CA 030 2AS Gas Analyzer Kit, O2/CO Sensors, 7 Probe, Vinyl Carrying Case quantity
Supco M501 20-1000 Range Megohmmeter In Service Case

Supco

SKU: M501
$206.52
MSRP: $237.50
You save 15%
Supco M501 20-1000 Range Megohmmeter In Service Case quantity
Klein Tools NCVT1P Non-Contact Voltage Tester Pen, 50 to 1000V AC

Klein Tools

SKU: NCVT1P
$19.97
Klein Tools NCVT1P Non-Contact Voltage Tester Pen, 50 to 1000V AC quantity
Klein Tools ET450 Advanced Circuit Tracer Kit

Klein Tools

SKU: ET450
$299.99
Klein Tools ET450 Advanced Circuit Tracer Kit quantity
TripleGuard Active Appliance Leak Shutoff

RectorSeal

SKU: 97720
$276.84
Rectorseal 97720 TripleGuard Active Appliance Leak Shutoff quantity
Wireless Power Clamp Meter, Sends to Mobile App

Fieldpiece

SKU: SC680
$443.70
Fieldpiece SC680 Wireless Power Clamp Meter, Sends to Mobile App quantity
Loaded Clamp Meter

Fieldpiece

SKU: SC640

Rated 5.00 out of 5
$289.00
Fieldpiece SC640 Clamp Meter LOADED with Features and Measurements quantity
Compact Clamp Meter with True RMS

Fieldpiece

SKU: SC260
$162.26
Fieldpiece SC260 Compact Clamp Meter with True RMS and Swivel Magnet quantity
Heated Diode Refrigerant Leak Detector

Fieldpiece

SKU: DR58
$378.62
Fieldpiece DR58 Heated Diode Refrigerant Leak Detector quantity
Job Link Dual Port Manometer Probe Kit

Fieldpiece

SKU: JL3KM2
$229.23
Fieldpiece JL3KM2 Job Link Dual Port Manometer Probe Kit quantity
Pro Tone and Probe PRO Wire Tracing Kit

Klein Tools

SKU: VDV500-820
$99.98
Klein Tools VDV500-820 Tone and Probe PRO Wire Tracing Kit quantity
Digital Circuit Breaker Finder GFCI Outlet Tester

Klein Tools

SKU: ET310
$49.97
Klein ET310 Digital Circuit Breaker Finder and GFCI Outlet Tester quantity
G3 Phoenix Clamp Meter with Dual-Display

UEi

SKU: DL429

$249.95Add to Cart for Savings

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Digital HVAC Clamp Meter with NCV and Cat IV Ratings

UEi

SKU: DL379B

Rated 5.00 out of 5
$159.99
Read more
Water Trap Replacement Filters (5 Pack)

Sauermann

SKU: 27729
$60.70
MSRP: $69.81
You save 13%
Sauermann 27729 Water Trap Replacement Filters (5 Pack) For Gas Analyzers quantity
Rover USB Communication Adapter COMMM4

Trane

SKU: ADP1161
$198.93
MSRP: $228.77
You save 15%
Trane ADP1161 Rover USB Communication Adapter COMMM4 quantity

Test Instruments

Brand

Category

Voltage

Temperature

Brand

Category

Voltage

Temperature