Sharma Enterprises

The Testo 440 Is A Handheld, Compact (154 X 65 X 32 Mm, 250 G) Multifunction Instrument For Measuring Air Velocity And Iaq, Featuring A 12-hour Battery Life, 7500-protocol Internal Memory, And Intuitive Menu-guided Operation. It Supports Bluetooth And Wired Probes (Including Pitot Tube/differential Pressure) For Measuring Hvac Parameters, Comfort Levels, Co2, And Humidity. 

The Testo 623 (0560 6230) is a digital, large-display hygrometer and thermometer designed for indoor monitoring of humidity (0 to 100% RH) and temperature (-10 to +60positive 60+60 °C). It features a 90-day data history with a built-in histogram display, allowing users to analyze past and current, or min/max, environmental conditions directly on the device without a PC

The testo 622 digital hygrometer and barometer is ideal for measuring air temperature, relative humidity and air pressure at once. Aids in monitoring the ambient air, especially in laboratories during calibration or when running experimental setups.