Relative Humidity Indicator

The indicator has bicolour dual display for humidity & temperature and is housed in a specially designed cabinet to minimize entry of dust & moisture. External sensors are provided with 5 mtrs. of cable to enable spot measurements. The instrument is designed for continuous 24 hrs on line operation and ideal for use in floor fermenting rooms (Tea Industry), food processing industry, clean rooms, laboratories, printings & film processing, storage rooms, climate control – HVAC & meteorological applications.
Humidity is mostly measured by dry & wet bulb thermometers, which have inherent errors. Fractional readings are not possible and parallax error causes faulty measurements. Dial type R.H. meters are not accurate and meters of foreign make have virtually no after sales service

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Performance Specification:

R.H. Measuring Range :0 - 100 % Non Condensing
R.H. Accuracy : ± 2 % R.H.
R.H. Repeatability : ± 1 % R.H.
R.H. Response Time : 30 Seconds in slow moving Air
Temp. Indication : 0 - 70 °C
Temp. Resolution : 0.1 °C
Temp. Accuracy : ± 0.5 °C
Power Requirement : 230 Volt AC ± 10%, 50 Hz.

Tested & Certified by ERTL, Govt. of India

Importance Of RH Fermentitation

Out of the many stages of tea processing, fermentation plays a vital role in determining the quality of tea produced. Fermentation is basically a natural oxidation reaction which starts as the green tea leaves are broken up (by Rotorvane, CTC cut). For optimum fermentation to take place, relative humidity (R.H.) and temperature are to be maintained within very narrow limits. R.H. of 85% to 95% and temperature of 27°C to 32°C provide the best conditions for fermentation. Higher or lower levels of temperature slow down the process significantly. At relative humidity below 85% surface drying takes place which means loss of polyphenols and enzymes which will lower the quality of tea produced.