The program calculates the relative humidity according to the readings of dry and wet thermometers of a psychrometric hygrometers types VIT-1, VIT-2 manufactured by Shatlygin & Co. LLC at different speeds of aspiration.
The calculation is made in accordance with GOST R 8.811-2012 "State system for ensuring the uniformity of measurements. Psychrometric tables."
Additionally, microclimate analysis is carried out according to the Scofield-Sterling diagram and according to GOST 30494-2011 "Residential and public buildings. Microclimate parameters in rooms".
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Psychrometric hygrometers of the VIT type are intended for measurements of relative humidity of air and ambient temperature in rooms.
The principle of operation of hygrometers is based on the determination of the relative humidity of the environment by the difference between the readings of "dry" and "wet" thermometers using a psychrometric table.
Structurally, the hygrometers consist of a plastic housing, in which two thermometers are installed - "dry" and "wet". On the back of the case there is a plastic tank (feeder), necessary for humidification of the "wet" thermometer by means of a wick. Next to the thermometers on the body of the hygrometers is a psychrometric table calculated for an aspiration rate of 0.5 to 1 m/s.
The value of relative humidity is defined in this table as the value that is at the intersection of the row that corresponds to the readings of the "dry" thermometer, and the column that corresponds to the difference between the readings of "dry" and "wet" thermometers (according to GOST 8.811 -2012).
Shatlygin & Co. Ltd. produces hygrometers in two versions - VIT-1 and VIT-2, which differ in the ranges of temperature and relative humidity and as a consequence - the scope.
Dimensions of our VIT:
The advantages of our VIT:
- The plastic feeder eliminates the problem of its breakage during transportation and operation;
- Clean laconic design without unnecessary color accents will suit any type of room;
- Reduced size and weight;
- Own, specially developed online service facilitating work with the device, keeping a log of measurements, and providing many other useful information;
- Possibility of determining the relative air humidity at aspiration speeds less than 0.5 m/s without additional blowing devices;
- Real measurement error at the level of the most accurate existing electronic thermo-hygrometers with a longer calibration interval and a significantly lower price;
- The design of the upper storage tank allows the connection of the thermometric liquid column without any problems;
- At the end of the shelf life, it is more convenient for disposal and attractive for plastics processors due to the absence of unnecessary dissimilar materials in the design;
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Psychrometric hygrometers VIT-1 and VIT-2, manufactured by Shatlygin and Co LLC, are not suitable for operation, according to the waste classification, they belong to the IV hazard class (low hazard, with a low degree of environmental impact with average recovery period 3 years) and disposed of in solid waste landfills in accordance with the established procedure.
The plastic and paper elements of the hygrometer structure are separately classified as hazard class V (harmless, pose the least hazard to the ecological situation and practically do not disturb the ecosystem), and can be recycled.
| Description | Code FWCC 2017-2020 |
Hazard class |
|---|---|---|
| Scrap and waste of polystyrene products, uncontaminated | 4 34 141 03 51 5 | V |
| Scrap and waste of polyethylene products, uncontaminated (except for containers) | 4 34 110 03 51 5 | V |
| Waste packaging corrugated board uncontaminated | 4 05 184 01 60 5 | V |
| Glass thermometers that have lost their consumer properties | 4 82 658 11 53 4 | IV |
| Glass break | 3 41 901 01 20 5 | V |
For the Russian Federation and the CIS countries
VIT at the Federal Information Fund for Ensuring the Uniformity of Measurements
Registration certificate and declaration
Explanation of the verification procedure application
Certificate of approval of type approval SI in the Republic of Kazakhstan
Expert opinion on primary recognition in the Republic of Belarus
For Ukraine
Type Verification Certificate (Module B)
About the calibration interval VIT
VIT in the register of approved types of measuring instruments of Ukraine
Measurement of relative humidity with a VIT hygrometer
How to export CSV and import to Excel
How to bring a hygrometer in working condition
What is Psyhrometer
You can buy psychrometric hygrometers VIT-1 and VIT-2 from our official distributors.