
• Use this product ONLY as instructed in this manual.
• DO NOT attempt to open, dismantle or modify this
• Before every use, inspect the device for missing,
broken, loose or corroded parts and battery leakage.
−DO NOT use this product if it is damaged in any
way; contact Draper Tools to discuss repair and
− If battery acid comes into contact with your skin,
wash it o immediately with plenty of clean water.
− If battery acid comes into contact with your eyes,
ush them with plenty of clean water and seek
immediate medical attention.
• DO NOT expose this product to liquids or wet
Measurement ranges Range Resolution Accuracy
Relative humidity 0–100%RH 0.1 ±3.0% RH (45–75% RH) / ±4.5% RH (others)
Temperature (°C) -20 to +70°C 0.1 ±1.0°C
Temperature (°F) -4 to +158°F 0.1 ±1.8°F
Dew point temp. As temps. 0.1 ±1.5°C / ±2.7°F*
Wet bulb temp. As temps. 0.1 ±1.5°C / ±2.7°F
Operating time up to 50 hours
Batteries 3 × 1.5V AAA (not supplied)
Permissible ambient conditions Temperature Humidity
Operation -20 to +60°C (-4 to +140°F) 10–90% RH
Storage -20 to +60°C (-4 to +140°F) 10–75% RH
Dimensions W 56 × H 168 × D 30.5mm
Weight (with batteries) 125g
*Accuracy is based on ambient conditions of 25°C, 40–100% RH.
3. Health and Safety Information
Important: Read all the Health and Safety instructions before attempting to use this product.
Read this manual in full before using this product and retain it for future use. Always use the latest version of the manual.
Please visit for the latest version.drapertools.com/manuals
This product is a hand-held device designed to measure light levels in a given environment. An indication of ambient
temperature is also given. Any other application beyond the conditions established for use will be considered misuse.
Draper Tools accepts no responsibility for improper use of this product.
Part of our core range, this product is suitable for regular use by enthusiasts and tradespersons alike.