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 handmeter 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

MDM25

MDM25 Probes

Hand Meter

Performance

Measurement Units

%RH, °C/°F Ta, °C/°F Td, g/m³, °C/°F Tw

Mechanical specification

Ingress Protection

IP54 - Hand meter only

Hand Meter Housing Material

Molded polymer housing ABS + rubber surround

Weight

300g (10.58oz)

Display Resolution

Graphic LCD 128 x 64 pixels

Electrical output/input

Supply Voltage

4.5 V (3 x AA batteries - provide approximately 70 hours of operation)

Electrical Connections

M9 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

Applications

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