Probes | McMaster-Carr

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Benzoic Acid Isoamyl Ester

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Retractable Insulation Piercing Grabber

Threaded Needle Tip

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Flat-Pin Mini Thermocouple Connector

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500° F to 999.9° F

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2,000° F to 2,999.9° F

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Probe Diameter

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Round-Pin Thermocouple Connector

Stem Diameter

3,526 Products

Most Likely Products

Probe Styli

Attach to CMM probes, CNC probes, or FARO arms to inspect workpieces

110 products

Thermocouples

Measure and transmit liquid, gas, and surface temperature

720 products

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

41 products

Picks

Hold, separate, and position small parts such as wire and springs

125 products

Spring Test Probes

Use in spring test probe sockets to test for continuity and damaged components in circuit boards

79 products

All Results

Measuring and Inspecting

Probe Styli

Attach to CMM probes, CNC probes, or FARO arms to inspect workpieces

110 products

Probe Stylus Accessories

Add components that extend length, adapt threads, or hold multiple styli at once

17 products

Probe Break Stems

Snap in two during an impact to protect probe styli from damage

6 products

Machine Tool Indicator Contact Points

Replace the contact point on your machine tool indicator

3 products

Coordinate Measurement Machine Probes

Take 3D measurements of workpieces on your CMM or CNC machine to inspect for quality

50 products

Machine Tool Indicators

Find the exact edge of a workpiece without math or guesswork to quickly align your machining setup

6 products

Variance Indicators

Identify small dimensional differences when checking part quality and alignment

7 products

Probe Stylus Installation Tools

Thread a stylus into your probe for a tight hold

2 products

Calibration Spheres

Test your CMM probe and stylus against a precise reference point before you start inspecting

7 products

Thickness Gauges

Move the thumb lever to quickly check the thickness of flat stock, pipe, or tubing

7 products

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

41 products

Spring Test Probes

Use in spring test probe sockets to test for continuity and damaged components in circuit boards

79 products

Test Lead Tips

Adapt Fluke test leads to perform electrical tests in tight spaces

1 product

Test Lead Adapters

Change tip styles to take different measurements with the same test leads

6 products

Spring Test Probe Sockets

Pair with spring test probes to test for continuity and damaged components in circuit boards

23 products

Multimeters

Take current, voltage, resistance, and other electrical measurements

109 products

BNC Test Cords

Connect oscilloscopes and other testers to your equipment

4 products

Patch Cords

Make point-to-point connections between electrical testing equipment and your devices

12 products

Oscilloscope/Multimeters

Perform electrical tests, record data, and view a graph of electrical waveforms

4 products

Oscilloscopes

Analyze problems with electrical equipment by graphing voltage and other electrical waveforms

1 product

Test Lead Clips

For hands-free testing, create a temporary yet secure electrical connection

77 products

Multimeter Hangers

Free up your hands when using a Fluke multimeter

1 product

Test Lead Sensors

Adapt Fluke multimeters to take temperature readings, so you don't need a separate meter

2 products

Electrical Resistance Meters

Prevent damage to electronics by checking that surfaces won't discharge static electricity

4 products

Multimeter Line Splitters

Use with a multimeter to determine current usage of devices without pulling apart their wires

1 product

Test Lead Wire

Add your own clips, tips, and adapters to link electrical testers to the units you're checking

4 products

Electronic-Component Testers

Test, identify, and troubleshoot components such as circuit boards and diodes

4 products

Current Indicating Rings

Run wire through rings to monitor AC current flow

5 products

Chemistry Sensors

Pair with chemistry meters to test oxidation reduction potential (ORP) or pH

11 products

Chemistry Meters

Take water-chemistry measurements more precisely than test strips and swabs

42 products

Air Particle Counters

Monitor indoor dust levels and measure filter efficiency in HVAC systems

1 product

Water Test Kits

All the chemicals and labware you need for on-site sampling and water-quality testing

30 products

Thermometers

Monitor temperature in tanks, pipes, control panels, and other equipment

517 products

Temperature and Humidity Meters

Simultaneously measure temperature and relative humidity

13 products

Humidity Meters

Measure relative humidity without complex calculations

4 products

Humidity-Indicating Cards

Check humidity levels of moisture-sensitive inventory and equipment at a glance

9 products

Humidity-Indicating Plugs

Monitor humidity in sealed containers without opening them, protecting the inside from contamination

6 products

Borescopes

Insert the camera into hard-to-reach areas to view them from your smart device or the display

14 products

Airflow Meters

Measure airflow in duct, air filters, exhaust hoods, and other air applications

25 products

Data Recorders

Log temperature, humidity, or pressure levels to track changes and troubleshoot your system

56 products

Data Recorder Charts

Place in temperature and humidity data recorders to document readings over time

16 products

Light Meters

Measure light quality and intensity

2 products

Barometers

Measure atmospheric pressure changes

8 products

Belt Tension Gauges

Check belt tension to minimize vibration, noise, and slippage

2 products

Fluid Handling

Thermocouples

Measure and transmit liquid, gas, and surface temperature

720 products

Thermocouple Connector Adapters

Convert round-pin male connectors to flat-pin male connectors

10 products

Thermocouple Transmitters

Check system temperatures from your smartphone or tablet

9 products

RTDs

Measure and transmit liquid, gas, and surface temperature more precisely than thermocouples

144 products

Thermocouple and RTD Fittings

Alter probe immersion depth or adapt unthreaded connections for use with threaded tanks and heads

50 products

Temperature and Humidity Transmitters

Regulate heating and cooling by sending temperature and humidity levels to PLCs and controllers

3 products

Noncontact Temperature Sensors

Monitor the temperature of hazardous, sensitive, and hard-to-reach materials without touching them

21 products

Thermocouple and RTD Mounts

Join thermocouple connectors and probes that have different connection types

18 products

Temperature Switches

Turn heating equipment on or off at a specified temperature

139 products

Temperature Controllers

Precisely regulate process temperatures; more accurate than temperature switches

95 products

Flow Switches

Turn equipment on or off when flow rate reaches a set point

26 products

Water Detectors

Place near tanks, sump pumps, and pipe lines to alert you to water leaks

2 products

Fabricating and Machining

Picks

Hold, separate, and position small parts such as wire and springs

125 products

Small Parts Positioners

Position and install tiny springs and wires

17 products

Packing Seal Pullers

Pull packing out of pump and valve seals

48 products

Packing Seal Installation Tools

Install packing into hard-to-reach areas without damaging the packing

2 products

Seal Pullers

Remove the seals around bearings

Map the ups and downs of print surfaces so printers extrude at the proper height

1 product

Containers, Storage, and Furniture

Syringe Needles

Dispense precise amounts of fluid from syringes

342 products

Syringes

Draw in and dispense fluids

158 products

Syringe Thread Adapters

Change connections on syringes, dispensing tips, and needles to luer lock or threaded connections

3 products

Syringe Tips

Dispense fluids or spread adhesives from syringes and other small instruments

20 products

Syringe Holders

Hang syringes when not in use to prevent contamination and spills

2 products

Syringe Adapters

Convert plastic syringe barrels into syringes for air-powered dispensers

10 products

Liquid Samplers

Collect liquid samples from drums, tanks, and other containers

42 products

Transfer Needles

Move liquids from one container to another without contamination or spilling

1 product

Dippers

Scoop and transfer liquid from deep containers such as vats and tanks

37 products

Spatulas

Mix and spread paints, chemicals, and adhesives

21 products

Powder Samplers

Take samples of powders or bulk materials

10 products

Spoons

Stainless steel, plastic, and wood spoons

9 products

Sludge Samplers

Collect and measure buildup from the bottom of oil tanks, wastewater lagoons, and other areas

7 products

Multimeter Cases

Store and carry multimeters

9 products

Test Lead Holders

Keep test leads organized and within reach

3 products

Facility and Grounds Maintenance

Soil Probes

Locate underground installations like water mains, drain tiles, and conduit before you dig

2 products

Electrical Power, Networking, and Controlling

Development Board Sensor Modules

Transform your development board into everything from an airflow monitor to a motion detector

1 product

Multifunction Chemistry Controllers

Use pH or oxidation reduction potential (ORP) levels to turn equipment on or off

7 products

Conductivity Controllers

Turn pumps, mixers, and valves on and off based on a solution’s conductivity

3 products

Monitoring Relays

Trip circuits or sound an alarm when voltage, current, or other limits are exceeded

31 products

Binding Posts

Test circuits before making permanent connections

4 products

Material Handling

Cable Bundling Tools

Quickly organize wires, cables, and cords into bundles

1 product

Heating, Ventilation, and Air Conditioning

HVAC Flame Detectors

Replace flame detectors in HVAC equipment such as furnaces, ovens, water heaters, and boilers

1 product

Safety Equipment

Multi-Gas Detectors

Monitor air for carbon monoxide and combustible gases including methane, hydrogen, and propane

8 products