UPDATE***** I originally wrote in my review that the numbers on the scale are almost unreadable . And you. for me (59 years old, corrective lenses and eye problems). My students, on the other hand, liked these spectroscopes and had no trouble reading the scale. The lab was a success and they had very accurate readings. Many students have preferred them to the Project STAR spectroscopes that we have. It was about 50/50. I told my students about the review I posted and we all agreed I better update it! practically unreadable. The spectroscopes we have used so far (from the STAR project) have excellent, very clear scaling. I was hoping to save some tuition but I'll be returning them and ordering Project STAR which are also available from Revain.
Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review
π PH 1-14 Extensive Storage Testing Monitoring: Optimize Your Storage with Precise pH Level Monitoring
6 Review
Accurate And Versatile Digital PH Meters For Food, Brewing, Hydroponics, Pools And More!
7 Review
Digital PH Meter Tester - Tiaoyeer Water Quality Tester With ATC, 0.01PH High Accuracy, 0.00-14.00 Measurement Range, 0.01 Resolution For Drinking Water, Aquarium, Swimming Pools, Hydroponic
8 Review
π‘οΈ Continuous Temperature Monitoring with Relative Humidity Integration
4 Review
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
π Dioxide Controller for Digital Gas Monitoring
5 Review
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review