1. The document provides specifications for various humidity, temperature, and environmental measurement instruments from Infra Control Systems including thermo-hygrometers, thermometers, anemometers, timers, and moisture meters.
2. Models range in size from pen-shaped units for field use to larger "super jumbo" devices with extra large digits.
3. Instruments measure parameters like humidity, temperature, air velocity, sound level, thickness, insulation resistance, grain moisture, and light intensity.