EXTECH Manuals & User Guides

User manuals, setup guides, troubleshooting help, and repair information for EXTECH products.

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

EXTECH manuals

Latest posts, featured manuals, and retailer-linked manuals for this brand tag.

EXTECH CT20 Continuity Tester Pro User Manual

EXTECH CT20 Continuity Tester Pro User Manual

January 29, 2026
USER MANUAL Continuity Tester Pro Model CT20 Introduction Congratulations on your purchase of the Extech CT20 Continuity Tester Pro. The CT20 allows a single user to quickly identify and label two wires even when the wire ends are in different…
Brand: EXTECH
EXTECH 407730 Digital Sound Level Meter User Manual

EXTECH 407730 Digital Sound Level Meter User Manual

January 21, 2026
EXTECH 407730 Digital Sound Level Meter Introduction Congratulations on your purchase of the Extech 407730 Digital Sound Level Meter. The 407730 measures and displays sound pressure levels in dB from 40 to 130dB. User selectable features include Frequency Weighting (‘A’…
Brand: EXTECH
EXTECH HD350 Heavy Duty Pitot Tube Anemometer User Manual

EXTECH HD350 Heavy Duty Pitot Tube Anemometer User Manual

January 21, 2026
EXTECH HD350 Heavy Duty Pitot Tube Anemometer Introduction Congratulations on your purchase of the Extech HD350. This handheld meter measures and displays air velocity (speed), air flow (volume), ambient air temperature, and gauge/differential pressure. This meter is shipped fully tested…
Brand: EXTECH
EXTECH PRC15 Current Voltage Calibrator User Manual

EXTECH PRC15 Current Voltage Calibrator User Manual

January 20, 2026
EXTECH PRC15 Current Voltage Calibrator Specifications Display Dot matrix LCD Maximum Load 1000 ohms @ 24mA Meter Power 6 AA batteries or AC adaptor Auto Power OFF Meter automatically powers off after 10 minutes of inactivity. Current output capability 24mADC…
Brand: EXTECH
EXTECH PH100 ExStik Waterproof pH Meters User Manual

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. This instrument is designed for high accuracy pH testing. This…
Brand: EXTECH
EXTECH 412355A Current Voltage Calibrator User Manual

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, Input/Output mini-connector, AC adaptor jack, Neck strap holders, Function switch…
Brand: EXTECH
EXTECH 445702 Hygro Thermometer Clock User Manual

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 Open the battery compartment and remove the battery safety strip.…
Brand: EXTECH
EXTECH 461995 Laser Photo Tachometer Instruction Manual

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 beam provides accurate long distance measurements for photo tachometer measurements.…
Brand: EXTECH
EXTECH RHT510 HygroThermometer User Manual

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 Type K temperature (using external probe). This device is shipped…
Brand: EXTECH
EXTECH CG204 Coating Thickness Tester User Manual

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 meter uses two measurement methods: magnetic induction (for ferrous metal…
Brand: EXTECH
Extech PH90 Waterproof pH Meter Instruction Manual

Extech PH90 Waterproof pH Meter Instruction Manual

PH90 • January 18, 2026 • Amazon
This manual provides detailed instructions for the Extech PH90 Waterproof pH Meter, covering product features, setup, operation, maintenance, troubleshooting, and technical specifications to ensure accurate and reliable pH measurements.
Brand: Extech