testo 608-H1 Thermohygrometer | Temperature 0–50 °C, humidity 10–95 %RH ±3 %RH, dew point display, 9 V battery approx. 1 year

testo 608-H1 Thermohygrometer: Continuous Temperature, Humidity and Dew Point Display

Overview

The 608-H1 is a testo thermohygrometer that continuously measures and displays temperature, relative humidity and dew point, for monitoring indoor environments such as offices, warehouses and laboratories. The humidity sensor is capacitive; the manufacturer states it is stable over the long term and can be used for many years. The 608-H2 in the same series has a wider measurement range and an LED alarm that lights when limit values are exceeded; specifications differ, please inquire separately.

Key Specifications

• Temperature: 0–50 °C, ±0.5 °C (25 °C), resolution 0.1 °C
• Dew point: −20 to 50 °Ctd
• Humidity: 10–95 %RH, ±3 %RH; long-term stability ±1 %RH/year; resolution 0.1 %RH
• Measuring rate: 18 seconds
• Power and dimensions: 9 V battery, approx. 1 year; 111 × 90 × 40 mm, 168 g
• Same series 608-H2: Temperature −10 to 70 °C, humidity 2–98 %RH ±2 %RH, LED alarm

Applications

• Monitoring of temperature, humidity and condensation in offices, warehouses and laboratories.

Specifications per the 608-H1 and 608-H2 product pages on the testo English site (retrieved 2026-10-21).