MDM25 Hand-Held Hygrometer

The MDM25 is a portable, battery-operated handmeter, and is available with a number of different probe confi gurations. It displays relative humidity, temperature and one calculated value, making this hand-held hygrometer suitable for a wide range of applications. The user can choose to display either °C or °F.

Product Features

• Displays %RH and temperature, plus dew point, absolute humidity and wet bulb temperature
• Simple to operate
• Long term stability: ±1% RH over 12 months

Hand-Held Hygrometer

Performance
Measurement Units%RH, °C/°F Ta, °C/°F Td, g/m³, °C/°F Tw Mechanical specification
Ingress ProtectionIP54 - Hand meter only Hygrometer Housing MaterialMolded polymer housing ABS + rubber surround Weight300g (10.58oz) Display ResolutionGraphic LCD 128 x 64 pixels Electrical output/input
Supply Voltage4.5 V (3 x AA batteries - provide approximately 70 hours of operation) Electrical ConnectionsM9 5-way triad connector

Probes

Performance
Measurement Range (RH)0 - 100% RH Accuracy at 25°C (77°F) Temperature<±0.2°C (±0.36°F) Stability - RH Sensor±1% RH/year Response time - RH Sensor<10 sec typical (for 90% of the step change) Measurement & Operating range (T)
   Fixed and Standard Probe
   Sword Probe
   Remote Probe
-20 to +80°C
-20 to +100°C
-20 to +150°C Accuracy at 25°C Humidity
   Fixed Probe
   Remote Probes
±2% RH (10 - 90% RH)
±2% RH (5 - 95% RH) Mechanical Specification
Weight

Fixed Probe (FPR)	30g
Standard Probe (SPR)	90g
Sword Probe (SWPR)	500g
Round 300mm Probe (HTPR300)	380g
Round 500mm Probe (HTPR500)	620g