The Combined Temperature and Humidity Sensor «Kvant» — marketed as the Kvant Thermohygrometer — is a fully autonomous wireless measurement instrument designed and manufactured by NIPP KP «Kvant» JSC, a Rostov-on-Don enterprise with deep heritage in space instrumentation, whose hardware operates aboard the ISS, Soyuz MS, Progress MS, and GLONASS satellites. The device simultaneously measures ambient temperature across the range of –40 °C to +80 °C (accuracy ±0.4–0.8 °C depending on sub-range) and relative humidity from 5 % to 95 % (accuracy ±3–5 %), storing a continuous electronic archive of all readings.
Measurements are transmitted wirelessly over an NB-IoT cellular channel with factory-prepaid traffic to the cloud-based Kvant-Energo platform, which generates reports and visualisations without any manual recording. The sensor runs for up to 5 years on a single battery charge, and its state-certified verification interval is 2 years — unusually long for this class of instrument.
The product is registered in the Russian State Register of Measurement Instruments (reg. No.
80773-20), listed in the Register of Industrial Products of the Russian Federation (No. 175/4/2023), and included in the Unified Register of Russian Electronic Products (No.
175/4/2023). In a single compact housing it combines the functions of a thermometer, hygrometer, thermo-logger, threshold alarm device, and primary measuring component for thermal mapping and microclimate monitoring.
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