MDM25 User Manual
14
97234 Issue 4.1, February 2022
APPENDIX A
Appendix A
Technical Specifications
HYGROMETER
Performance
Measurement Units
%RH, ºC / ºF Ta, ºC / ºF Td, g/m
3
, ºC / ºF Tw
Mechanical Specification
Ingress Protection
IP54
Hygrometer Housing Material Molded polymer housing ABS + rubber surround
Weight
300 g (10.58 oz)
Display Resolution
Graphic LCD 128 x 64 pixels
Electrical Output/Input
Supply Voltage
4.5 V
(3 x ‘AA’ batteries – provide approximately 150 hours of operation)
Electrical Connections
M9 5-way binder 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...+80 °C (-4...+176 °F)
-20...+100 °C (-4...+212 °F)
-20...+150 °C (-4...+302 °F)
Accuracy at 25 °C (77 °F)
Humidity
- Fixed Probe
- Remote Probe
±2% rh (10...90% rh)
±2% rh (5...95% rh)
Mechanical Specification
Weight
Fixed Probe
Standard Probe
Sword Probe
High Temp 300mm Probe
High Temp 500mm Probe
FPR
SPR
SWPR
HTPR300
HTPR500
30g (1.06 oz)
90g (3.17 oz)
500g (1.1 lb)
380g (13.4 oz)
620g (1.37 lb)
