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
Бесконтактный инфракрасный термометр Berrcom JXB-178 для лба: 3 в 1 проверка температуры для детей, младенцев и взрослых
62 Review
Precise Humidity Control With Xikar PuroTemp Round Digital Hygrometer, 10-Second Refresh Rate
27 Review
Room temperature and humidity sensor Aqara Temperature and Humidity Sensor
59 Review
Сплит-система Roda RS-AL09F / RU-AL09F
37 Review
UL Certified 120V Unheated Awoco 48 Super Power 2 Speeds 1650CFM Commercial Indoor Air Curtain With Free Door Switch
23 Review
Белый двухзонный микроразделительный кондиционер с тепловым насосом Senville, 28000 БТЕ, совместимый с Alexa - SENA-30HF/D
21 Review
Сохраняйте прохладу с портативным кондиционером COMFYHOME 3-в-1 — эффективным испарительным охладителем воздуха для дома и офиса
11 Review