Extech RH350 Dual Input Hygro-Thermometer Psychrometer
The Extech RH350 is a sophisticated handheld psychrometer designed for environmental and HVAC professionals. It measures relative humidity, air temperature, dew point, wet bulb temperature, and supports dual external Type K probes for advanced differential readings (e.g. T1-T2, Air-T1, T1-Dewpoint). With memory storage, RS-232 connectivity, and a multi-mode display, it’s built for flexibility and precision in diverse measurement tasks.
Description
The RH350 is engineered to deliver comprehensive psychrometric data in the field. Its sensor system measures ambient relative humidity (10–90 % RH) and internal air temperature (–20 to 50 °C). It also accepts two Type K thermocouple probes (T1 and T2) to enable differential temperature measurements (such as T1–T2, Air–T1) and comparison to dew point. The display is a triple backlit LCD that can be configured to show combinations of humidity, temperature, wet bulb, dew point, and external probe readings. The instrument stores up to 99 data records in internal memory and can transmit readings to a PC via an RS-232 interface. Additional features include Min/Max/Average modes, Data Hold, selectable °C/°F units, auto power-off (with disable), and a twist-shut protective sensor cap. The unit ships with two Type K bead wire probes and four AAA batteries.
Features
- Dual Type K external probe inputs for T1 and T2 differential measurements
- Measures %RH, air temperature, wet bulb, dew point, and temperature differentials
- Triple backlit LCD display configurable for multiple parameter views
- Memory for up to 99 stored data records
- RS-232 interface for PC data transfer
- Min/Max/Average recording modes
- Data Hold and auto power-off (with disable)
- Switchable °C/°F with 0.1° resolution
- Protective sensor cap that twists closed for storage
- Supplied with two Type K bead wire probes and AAA battery power
Includes
- 2 Type K temperature probes
- Four AAA batteries
