
Mine wasn't as accurate as other reviewers have said, plus one arrived with a cracked display. I used a jar with packets at 62% relative humidity. Leave them in a closed jar for 2 days. I also put a more expensive reader in a jar for them. My more expensive sensor showed 62%, as did one of them. 3 of them read 60. The rest were @59 with one at 58. Close enough I think.

Wintact Handheld Anemometer Small Digital Vane Wind Speed Meter Gauge, Pocket Air Flow Velocity Tester With Measuring Wind Temperature 14℉ To 113℉ For House HVAC Duct Outdoor Kite Boat Sailing Surfing
18 Review

Precise Humidity Control With Xikar PuroTemp Round Digital Hygrometer, 10-Second Refresh Rate
27 Review

Xiaomi Mijia Hygrometer Bluetooth Global Thermometer, white
32 Review

Xiaomi Mijia Temperature And Humidity Electronic Watch, white
50 Review

🥛 Electrolux EACS-12HG2/N3 Split System Air Conditioner with Milk Cooling Feature
12 Review

Split system Roda RS-AL09F / RU-AL09F
37 Review

White Senville Dual Zone Mini Split Air Conditioner Heat Pump, 28000 BTU, Alexa Compatible - SENA-30HF/D
21 Review

Senville AURA: Energy Star Mini Split Heat Pump W/ 9000 BTU & Alexa Compatibility
13 Review