I love GQ products and bought them out of curiosity rather than necessity. The very low readings prompted me to purchase low-dose radiation sources. Yes it works as test sources have increased counts per minute from a few to over 1000 (unsure). Not as handy as air quality monitors or EMF-RF, this is a way to detect ionizing radiation. Too bad there's nowhere to hide when the world goes nuclear. This is the gauge you want to avoid when this happens!
π― Honey Refractometer with Automatic Temperature Compensation (ATC) - Tiaoyeer Moisture, Brix, and Baume Refractometer for Honey, 58-90% Brix Scale Range - Honey Moisture Tester
31 Review
Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review
TDS water quality tester - TDS water hardness meter (portable digital salt meter for water analysis)
9 Review
Efficiently Test Your Antifreeze And Battery Acid With A 3-In-1 Refractometer
18 Review
π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review
π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review