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 1–48 of 73 resultsSorted by popularity

Dual Readout Thermometer with 2 Thermocouple Clamps

Hilmor

SKU: 1839106

Rated 4.50 out of 5
$175.90
Hilmor 1839106 - Dual Readout Thermometer w/ Thermocouple with 2 Clamps quantity
HVAC/R Temperature Meter -58°F to 572°F

UEi

SKU: PDT650

Rated 5.00 out of 5
$28.90
UEi PDT650 Folding Digital Pocket Thermometer – HVAC/R Temperature Meter -58°F to 572°F quantity
Adjustable Pocket Thermometers with Case and 5″ Stem

MA-Line

SKU: MA-PT160B

Rated 5.00 out of 5
$8.03
MSRP: $9.23
You save 15%
MA-Line MA-PT160B Adjustable Pocket Thermometers with Case and 5in Stem quantity
Digital Pocket Thermometer, Water Resistant

MA-Line

SKU: MA-PDT392B
$17.21
MSRP: $19.79
You save 15%
MA-Line MA-PDT392B Digital Pocket Thermometer, Water Resistant quantity
Fan Blade Pitch Gauge With Needle Pointer

MA-Line

SKU: MA-PG1

Rated 5.00 out of 5
$10.08
MSRP: $11.60
You save 15%
MA-Line MA-PG1 Fan Blade Pitch Gauge – HVAC Tool For Accurate Fan Blade Angle Measurement quantity
Digital Clamp-On Meter, Dual Display

UEi

SKU: DL369
$89.89
Read more
Plug-in GFI Receptacle Tester, Checks for Electrical Issues

MA-Line

SKU: MA-8205
$11.99
MSRP: $13.79
You save 15%
MA-Line MA-8205 Plug-in GFI Receptacle Tester quantity
Clamp Meter, Measure Distorted and Non-Distorted Sine Waves

UEi

SKU: DL389B

Rated 4.50 out of 5
$177.57
Read more
UEi 600A TRMS Clamp Meter With DC Amps, Inrush, Magnet

UEi

SKU: DL589
$251.46
UEi DL589 600A TRMS Clamp Meter w/ DC Amps, Inrush, Magnet quantity
Digital Clamp Meter AC/DC Auto-Ranging

Klein Tools

SKU: CL800
$139.96
Klein Tools CL800 Auto-Ranging TRMS AC/DC Digital Clamp Meter quantity
Supco DVCV Genuine OEM Volt/Current Logger W/ Display

Supco

SKU: DVCV
$251.99
MSRP: $289.79
You save 15%
Supco DVCV Genuine OEM Volt/Current Logger W/ Display quantity
Test Leads w/ Alligator Clips CAT IV 600V CAT III 1000V

UEi

SKU: ATL55
$18.51
UEI ATL55 Test Leads w/ Alligator Clips CAT IV 600V CAT III 1000V quantity
Sale!
Digital Electrical Clamp Meter, High-Precision Smart Chip

NAVAC

SKU: NMC1

$113.00Add to Cart for Savings

NAVAC NMC1 Digital Electrical Clamp Meter, High-Precision Smart Chip quantity
Voltage Detector with LED Flashlight

MA-Line

SKU: MA-49858B
$15.75
MSRP: $18.11
You save 15%
MA-Line MA-49858B 24VAC to 1000VAC Voltage Detector with Flashlight quantity
Long-Range Wireless Vacuum Gauge

Fieldpiece

SKU: MG44
$272.14
Fieldpiece MG44 Long-Range Wireless Vacuum Gauge for Up to 1000ft quantity
True-RMS Dual Display Digital HVAC Clamp Meter

UEi

SKU: DL579
$187.38
Read more
Folding Pocket Thermometer with Larger Display

UEi

SKU: PDT655
$33.37
UEi PDT655 Folding Pocket Thermometer with Larger Display quantity
18″ Long Test Leads with Alligator Clamps

MA-Line

SKU: MA05031-2
$11.76
MSRP: $13.52
You save 15%
MA-Line MA05031-2 10-Piece 18in Long Test Leads with Alligator Clamps quantity
Supco MAG1BK 30 VAC Magnetic Test Leads, 20″ Lead

Supco

SKU: MAG1BK
$10.70
MSRP: $12.31
You save 13%
Supco MAG1BK 30 VAC Magnetic Test Leads, 20" Lead quantity
UEi EM720SPKIT Hi-Res Differential Manometer Static Pressure Kit

UEi

SKU: EM720SPKIT

$233.71Add to Cart for Savings

UEi EM720SPKIT Hi-Res Differential Manometer Static Pressure Kit quantity
Wireless TRMS Clamp Meter with Motor Testing

UEi

SKU: DL599

Rated 5.00 out of 5
$310.14
UEi DL599 Wireless TRMS Clamp Meter with Motor Testing quantity
Insulation Tester Megohmmeter, Handheld

Supco

SKU: M500
$120.00
MSRP: $138.00
You save 15%
Supco M500 LED Megohmmeter for Insulation Testing, Hand Held quantity
Digital Multi-Meter with Temperature, True RMS – CAT III 600V

MA-Line

SKU: MA-1028
$33.01
MSRP: $37.96
You save 15%
MA-Line MA-1028 Digital Multi-Meter with Temperature, Cat III quantity
Job Link Flex Psychrometer Probe

Fieldpiece

SKU: JL3RH
$157.13
Fieldpiece JL3RH Job Link System Psychrometer Probe with Flexible Wand 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
Digital Capacitor Value Measurement Tool

Supco

SKU: MFD10
$67.15
MSRP: $77.22
You save 15%
Supco MFD10 Digital Capacitor Tester quantity
Combustion Analyzer with HydroCycle

Fieldpiece

SKU: CAT85
$1,870.76
Fieldpiece CAT85 Combustion Analyzer with HydroCycle quantity
Portable Dual-Port Manometer – Measures Gas Pressure

Fieldpiece

SKU: SDMN5
$188.02
Fieldpiece SDMN5 Dual-Port Manometer quantity
Heated Diode Refrigerant Leak Detector

Fieldpiece

SKU: DR58
$378.62
Fieldpiece DR58 Heated Diode Refrigerant Leak Detector quantity
Expandable Manual Ranging Stick Multimeter for HVAC/R

Fieldpiece

SKU: HS33
$208.25
Fieldpiece HS33 Expandable Multimeter with K-Type Thermocouple 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
Digital HVAC Clamp Meter with NCV and Cat IV Ratings

UEi

SKU: DL379B

Rated 5.00 out of 5
$159.99
Read more
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
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
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
Fast-Reaction Carbon Monoxide Detector

Fieldpiece

SKU: SCM4
$321.30
Fieldpiece SCM4 Fast-Reaction Carbon Monoxide CO Detector 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
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

Read more
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
2-Zone Inst

Cooper-Atkins

SKU: TD2000-01-1
$155.95
MSRP: $179.34
You save 13%
Cooper Atkins TD2000-01-1 Dual Input Type-K Thermocouple Instrument Kit quantity
Sauermann Si-PM3 Digital Differential Pressure Manometer

Sauermann

SKU: SIPM3
$202.99
MSRP: $233.44
You save 15%
Sauermann Si-PM3 Digital Differential Pressure Manometer quantity