Skip to Main Content
  • Instrumart
Instrumart logo
  • Products
  • Brands
  • Applications
  • Lab
  • Blog
  • Account
  • Email Us
  • 1-800-884-4967
  • What can we help you find?

    Can’t find what you’re looking for? Contact one of our engineers today. We’re open 8:00 am to 5:30 pm ET.
    • 1-800-884-4967
    • Email Us
    • Live Chat

We are currently experiencing problems with our phone system.
Please email us at sales@instrumart.com
or try calling later today if you experience any problems.

  1. Infrared Thermometers
  2. Handheld Infrared Thermometers

Extech 42535 Mini Infrared Thermometer

-76 to 932°F, 11:1 (D:S), ±2% accuracy, laser sight, adjustable emissivity, type K input .

Extech 42535 Mini Infrared Thermometer
Extech 42535 Mini Infrared Thermometer with Type K Input
Retired products cannot be ordered
The 42510A is the recommended replacement

View Company Reviewsby Trustpilot
Part Number
  • 42535
Manufactured
  • By Extech
Includes
  • FREE Ground Shipping on orders of $1,000 or more
  • FREE Lifetime Tech Support
Questions?
Call 1-800-884-4967 or email sales@instrumart.com. Open 8:00 am to 5:30 pm ET.
Trustpilot

Overview

Features

  • -76 to 932°F
  • Up to ±2% accuracy
  • 11:1 D:S
  • Built-in laser pointer improves aim
  • Auto-hold after releasing the Measure button
  • Type K thermocouple input
  • Min/Max/Avg plus differential between Max – Min
  • Data Hold, Auto power off with disable function, low battery indication
  • Complete with batteries
  • Carrying and Type K thermocouple sold separately

Description

LT300 Best Value Alternative
LT300!
-76 to 1400°F
D:S = 20:1
±1% Accuracy

The non-contact Extech 42535 Mini infrared thermometer features a Type K thermocouple input. With an adjustable High/Low setpoint, the Extech 42535 infrared thermometer has an audible alarm to alert the user when the temperature exceeds programmed setpoints.

The Extech 42535 Mini infrared thermometer has an 11 to 1 distance to target ratio and a wide temperature range of -76 to 932°F. This infrared thermometer has a built-in laser pointer to increase target accuracy and an auto-hold feature after releasing the Measure button. The Extech 42535 infrared thermometer has an adjustable emissivity to increase measurement accuracy for different surfaces.

The Extech 42535 infrared thermometer has many applications. Use your Extech 42535 Mini to measure surface temperature of objects difficult to reach or unsafe to contact and to measure hot spots in electrical panels and equipment. You can also use your Extech 42535 infrared thermometer for in-process temperature measurements.

Infrared Temperature Measurement - Technology Explained:

Infrared thermometers measure temperature from a distance by detecting the amount of thermal electromagnetic radiation emitted from the object being measured. This allows users to accurately measure surface temperatures in hazardous or hard-to-reach places, or other situations in which non-contact temperature measurement is desirable. Infrared thermometer technology is useful in a wide range of applications – including industrial, laboratory, food service, fire fighting, hobby, and home use.

While the technology is relatively simple, the myriad of names given to these devices can be confusing. "Laser Thermometers" makes reference to the laser that helps aim the thermometer. "IR Sensors" and "IR Thermometers" make use of a common abbreviation for "infrared". "Non-Contact Thermometers" is descriptive of the device's ability to measure temperature from a distance. "Radiation Pyrometers" is a scientific/technical term for these devices.

Documents

Documents

  • Extech 42535 Mini Infrared Thermometer Spec Sheet PDF (142 KB)
  • Extech 42535 Mini Manual PDF (93 KB)
  • Extech 42535 Warranty PDF (21 KB)
  • Infrared Application Advisor

Accessories

Extech General Purpose Temperature Probes
Extech General Purpose Temperature Probes

Temperature probes available in a wide variety of styles for general purpose applications.

Mfg. has some models in stock
Starting at $17.99

Need Help? Call a Temperature engineer at 1-800-884-4967

We're open 8:00 am to 5:30 pm ET

Shawn D. headshot Shawn D.
Senior Applications Engineer
20 years at Instrumart
Dwight M. headshot Dwight M.
Senior Applications Engineer
28 years at Instrumart
Rhys D. headshot Rhys D.
Applications Engineer
Luke M. headshot Luke M.
Applications Engineer
5 years at Instrumart
Ron J. headshot Ron J.
Temperature Engineering Lead
29 years at Instrumart
Alex A. headshot Alex A.
Senior Applications Engineer
19 years at Instrumart
David S. headshot David S.
Applications Engineer
Shawn D. headshot Shawn D.
Senior Applications Engineer
20 years at Instrumart
Dwight M. headshot Dwight M.
Senior Applications Engineer
28 years at Instrumart
Rhys D. headshot Rhys D.
Applications Engineer
Luke M. headshot Luke M.
Applications Engineer
5 years at Instrumart
Ron J. headshot Ron J.
Temperature Engineering Lead
29 years at Instrumart
Alex A. headshot Alex A.
Senior Applications Engineer
19 years at Instrumart
David S. headshot David S.
Applications Engineer
Shawn D. headshot Shawn D.
Senior Applications Engineer
20 years at Instrumart

Recently Viewed

Extech 42535 Mini Infrared Thermometer
Extech 42535 Mini Infrared Thermometer
United States Canada Mexico
Shop
Products
Brands
Applications
Support
Customer Service
Ask a Question
Live Chat
Track Order
Fraud Prevention
Financing
Our Company
Blog
About Us
Contact Us
Jobs
Travel Information
Our Team
Privacy Policy
Terms and Conditions of Sale
Accessibility Statement
Connect
1-800-884-4967
sales@instrumart.com
Instrumart
35 Green Mountain Dr
S Burlington, VT 05403 US
Mo-Th 8:00am to 5:30pm ET
Fr 8:00am to 5:00pm ET
Join Us on Facebook
Follow Us on X

Instrumart is a member of a family of industrial stores

Instrumart Compressor World Pump World BioPharm World Filtration World Motion World Qualitrol Engineered Solutions Wholesale Air Pipe
© Instrumart 2025

Family of Industrial Stores

Welcome to our family of stores, your go-to source for a wide selection of commercial and industrial products in the flow control and automation sectors. Each store features a curated range of specialized industrial solutions, with many items designed to complement each other, ensuring you can find everything you need for your specific application. Explore the stores below to discover our extensive product offerings for your business needs.

  • Instrumart

    Shop Industrial and Laboratory Instruments.

    Shop Now!
  • Compressor World

    Shop Compressed Air Equipment.

    Shop Now!
  • Pump World

    Shop Industrial, Water, and Waste Water Pumps.

    Shop Now!
  • BioPharm World

    Shop Sanitary Process Solutions and Products.

    Shop Now!
  • Filtration World

    Shop Industrial Filters.

    Shop Now!
  • Motion World

    Shop Motion Control and Process Automation Systems.

    Shop Now!
  • Qualitrol

    Shop Remanufactured or Repair Automation Products.

    Shop Now!
  • Engineered Solutions

    Shop Custom Engineered and Manufactured Systems.

    Shop Now!
  • Wholesale Air Pipe

    Shop Air Piping.

    Shop Now!