Description
testo 625 Digital Thermohygrometer
The testo 625 is a compact, high-precision handheld thermohygrometer designed for fast, accurate measurement of ambient air temperature and relative humidity. Engineered for indoor air quality (IAQ) monitoring, HVAC balancing, storage facility climate control, and greenhouse management, the instrument automatically calculates critical humidity parameters such as Dew Point ($td$) and Wet Bulb temperature.
testo 625 Digital Thermohygrometer
Key Features & Design Highlights
-
Automatic Psychrometric Calculations: Instantly computes dew point and wet bulb temperature alongside real-time relative humidity and air temperature.
-
Smart App Connectivity: Integrates seamlessly with the testo Smart App via Bluetooth for second-screen data display, real-time graphical trend tracking, timed/multi-point mean calculation, and immediate PDF/CSV report generation on-site.
-
Flexible Sensor Architecture: Features a plug-in humidity probe head attached directly to the unit, which can also be detached and connected via an optional probe cable or wireless radio handle for hard-to-reach locations.
-
Audible & Visual Alarm System: Allows custom threshold configuration with an audible alarm when upper or lower climate limits are exceeded.
-
Long-Term Sensor Stability: Incorporates Testo’s patented capacitive humidity sensor for reliable, drift-free long-term measurements.
-
Rugged & Efficient: Protected by an ABS/TPE composite housing and compatible with the optional TopSafe indestructible cover. Operates up to 100 hours on standard batteries with auto-off functionality.
Technical Specifications
| Parameter |
Specification |
| Humidity Sensor (Capacitive) |
Range: $0\text{ to }100\%\text{ RH}$
Accuracy: $\pm2.5\%\text{ RH}$ ($5\text{ to }95\%\text{ RH}$)
Resolution: $0.1\%\text{ RH}$
|
| Temperature Sensor (NTC) |
Range: $-20\text{ to }+60^\circ\text{C}$ ($-4\text{ to }+140^\circ\text{F}$)
Accuracy: $\pm0.5^\circ\text{C}$ ($\pm0.9^\circ\text{F}$)
Resolution: $0.1^\circ\text{C}$ ($0.1^\circ\text{F}$)
|
| Calculated Parameters |
Relative Humidity ($\%\text{RH}$), Temperature ($^\circ\text{C}/^\circ\text{F}$), Dew Point ($td$), Wet Bulb ($wb$) |
| Protection Class |
Main Instrument: IP40 (IP65 with protective cover) | Probe: IP20 |
| Power Supply |
$3 \times 1.5\text{V AA}$ batteries (~100 hours battery life) |
| Operating Conditions |
Meter: $-20\text{ to }+50^\circ\text{C}$ ($-4\text{ to }+122^\circ\text{F}$) | Probe: $$-20\text{ to }+70^\circ\text{C$ |
| Dimensions & Weight |
Meter: $208 \times 60 \times 28\text{ mm}$ ($8.2 \times 2.4 \times 1.1″$) | Weight: $$199.6\text{ g$ ($$0.44\text{ lbs$) |
| Scope of Delivery |
testo 625 meter with integral probe head, transport bag, calibration protocol, and 3x AA batteries |
Practical Applications
-
HVAC & Indoor Air Quality (IAQ): Evaluating occupant thermal comfort and air conditioning system effectiveness.
-
Archives, Libraries & Museums: Maintaining strict microclimate bounds to preserve paper, artwork, and historical artifacts.
-
Storage Facilities & Warehouses: Monitoring moisture-sensitive goods, pharmaceuticals, and agricultural yield.
-
Greenhouses & Agriculture: Optimizing ambient moisture and temperature ratios for plant yield control.
Reviews
There are no reviews yet.