Cheap crap I've been doing for 39 years, the dial only zeroes when rotated clockwise, if you have to zero counterclockwise the lens weakens. Fowler was a good brand in its day. No, that's junk! Waste of money $$!
Digital multimeter RGK DM-12
6 Review
π Dioxide Controller for Digital Gas Monitoring
5 Review
π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review