Psychrometric Hygrometer VIT-2 for Humidity and Temperature Measurement — THERMOSPECTR LLC

The VIT-2 psychrometric hygrometer (catalog code ГП-002) is a portable, mechanical instrument manufactured by THERMOSPECTR LLC (НПП Термоспектр) in Ekaterinburg under technical specification ТУ 26.51.51-001-80126927-2023. It operates on the psychrometric principle, using a pair of thermometers — one dry-bulb and one wet-bulb — to determine relative air humidity across a range of 20% to 90%, within a temperature span of 15°C to 40°C.

Both thermometers are filled with toluene, a thermometric liquid selected for its chemical stability, accuracy, and consistent performance throughout the instrument's full working range. Fine 0.2°C scale graduations allow precise readings with minimal interpolation.

The VIT-2 is listed in Russia's State Registry of Measuring Instruments under registration number 93100-24, confirming metrological traceability and suitability for use in formal measurement procedures requiring certified instrumentation. The instrument is also included in the Russian Industrial Products Registry (GISP), making it eligible for state and municipal procurement.

Each unit ships as a complete ready-to-use kit: the hygrometer body, a wick, a feeder, protective packaging, a factory-issued passport with initial verification, and a full operating manual. The mandatory verification interval is 24 months.

Weighing under 350 g and measuring no more than 295 × 120 × 50 mm, the VIT-2 is compact and practical for laboratories, warehouses, agricultural storage, and any indoor environment where humidity monitoring is required.