📘 Extech manuals • Free online PDFs
Extech logo

Extech Manuals & User Guides

Extech Instruments is a leading manufacturer of handheld test and measurement tools, including multimeters, clamp meters, thermometers, and environmental testers.

Tip: include the full model number printed on your Extech label for the best match.

About Extech manuals on Manuals.plus

Extech Instruments, a subsidiary of Teledyne FLIR, is a globally recognized manufacturer of test and measurement equipment. With a history spanning over four decades, the brand is synonymous with quality, accuracy, and durability in handheld diagnostic tools.

The company produces an extensive array of instruments including multimeters, clamp meters, borescopes, and environmental meters for measuring light, sound, temperature, and humidity. Extech tools are the go-to choice for professionals in electrical contracting, HVAC/R, plant maintenance, and pollution testing.

Extech manuals

Latest manuals from manuals+ curated for this brand.

EXTECH PH100 ExStik Waterproof pH Meters User Manual

December 11, 2025
EXTECH PH100 ExStik Waterproof pH Meters User Manual Additional User Manual Translations available at www.extech.com Introduction Thank you for selecting the Extech Model PH100 and/or the model PH110 (refillable) meter.…

EXTECH 412355A Current Voltage Calibrator User Manual

December 10, 2025
EXTECH 412355A Current Voltage Calibrator Specifications Model: 412355A Functionality: Current/Voltage Calibrator Power Source: 9V battery or AC adapter Features: LCD, POWER button, UP/DOWN buttons, MODE button, UNIT button, MEM/ZERO button,…

EXTECH 445702 Hygro Thermometer Clock User Manual

August 4, 2025
EXTECH 445702 Hygro Thermometer Clock Specifications Display: Time (12/24 hour clock), Temperature (°C/°F), Relative Humidity (%) Power Supply: 1.5V AAA battery Low Battery Indication: Yes Product Usage Instructions Getting Started…

EXTECH 461995 Laser Photo Tachometer Instruction Manual

July 26, 2025
EXTECH 461995 Laser Photo Tachometer Introduction Congratulations on your purchase of Extech's Laser Photo/Contact Tachometer, Model 461995. This Tachometer provides contact/non-contact RPM and Linear Surface Speed measurements. The laser pointer…

EXTECH RHT510 HygroThermometer User Manual

June 24, 2025
EXTECH RHT510 HygroThermometer Product Usage Instructions Introduction Thank you for selecting the Extech Model RHT510. This hand-held device measures Relative Humidity, Air temperature, Dew point temperature, Wet bulb temperature, and…

EXTECH CG204 Coating Thickness Tester User Manual

November 21, 2024
EXTECH CG204 Coating Thickness Tester Introduction Congratulations on your purchase of the Extech CG204 Coating Thickness Tester. The CG204 is a portable meter designed for non-invasive coating thickness measurements. The…

EXTECH HD400 Heavy Duty Light Meters User Guide

October 6, 2024
EXTECH HD400 Heavy Duty Light Meters Product Information Specifications: Fc Range: Varies based on model Lux Range: Varies based on model Accuracy: Model specific Max Resolution: Model specific Datalogging (HD450):…

Extech PH220 Waterproof Palm pH Meter User Manual

User Manual
User manual for the Extech PH220 Waterproof Palm pH Meter. Covers introduction, meter description, operation, calibration, measurement, storage, battery replacement, maintenance, troubleshooting, and specifications.

Extech 412355A Current/Voltage Calibrator User Manual

User Manual
Official user manual for the Extech 412355A Current/Voltage Calibrator. Learn how to measure and source current and voltage, use memory functions, and understand specifications, warranty, and support information.

Extech ExStik Waterproof pH Meters PH100 & PH110 User Manual

User Manual
Comprehensive user manual for the Extech ExStik Waterproof pH Meters, models PH100 and PH110. Provides detailed instructions on operation, calibration, electrode maintenance, battery replacement, safety precautions, specifications, and troubleshooting for…

Extech manuals from online retailers

Extech 382252 Earth Ground Resistance Tester Kit User Manual

382252 • January 8, 2026
Comprehensive instruction manual for the Extech 382252 Earth Ground Resistance Tester Kit, covering setup, operation, maintenance, troubleshooting, and specifications for accurate earth ground and electrical measurements.

Extech LT300 Light Meter User Manual

LT300 • December 1, 2025
Comprehensive user manual for the Extech LT300 Light Meter, covering setup, operation, maintenance, troubleshooting, and technical specifications.

EXTECH SDL600 Sound Meter SD Logger Instruction Manual

SDL600 • December 1, 2025
Comprehensive instruction manual for the EXTECH SDL600 Sound Meter SD Logger, covering setup, operation, maintenance, troubleshooting, and specifications for environmental sound level measurement.

Extech MG300-ETK Electrical Troubleshooting Kit User Manual

MG300-ETK • November 4, 2025
Comprehensive user manual for the Extech MG300-ETK Electrical Troubleshooting Kit, including the MG300 Multimeter/Insulation Tester, 42509 Infrared Thermometer, and MA430T AC Clamp Meter. Covers setup, operation, maintenance, and…

Extech support FAQ

Common questions about manuals, registration, and support for this brand.

  • Where can I find user manuals for my Extech device?

    You can find current user manuals, data sheets, and software on the Extech website or the Teledyne FLIR support portal.

  • What is the standard warranty for Extech products?

    Most Extech instruments come with a two-year warranty against defects in parts and workmanship, though some sensors and cables may have a six-month limited warranty.

  • How do I recalibrate my Extech meter?

    Extech recommends annual calibration to ensure accuracy. Calibration services can be arranged through the FLIR support and repair department.

  • How do I contact Extech technical support?

    You can contact Extech technical support via the FLIR support portal, by emailing support@extech.com, or by calling their support line at 781-890-7440.