DM509 & 535

 Hand-held Relative Humidity and Temperature Transmitters
The DM Series is a range of portable, battery-operated thermohygrometers. Available with a number of different probe configurations and with display of relative humidity, dew point, absolute humidity and temperature, the DM Series is suitable for a wide range of applications.






Product Features

  • Displays % RH, dew point, absolute humidity, or temperature
  • Available in different configurations
  • Lightweight and portable
  • Simple to operate
  • Long term stability: ±1% RH over 12 months
 DM509 & 535

Technical Specification
Performance
Measurement Range (RH) 0-100% RH
Measurement and Operating Range (T) Fixed and standard probe: -20 to +60°C / -4 to +140°F
Sword probe: -20 to +100°C / -4 to +212°F
Remote probe: -20 to + 150°C / -4 to +302°F
Accuracy at 25°C / 77°F Humidity Fixed probe: ±2% RH (10–90% RH)
Remote probe: ±2 % RH (5–95% RH)
Accuracy at 25°C/ 77°F Temperature ±0.2°C / ±0.36°F (Pt100 1/3 DIN direct / Models MX & TX have Pt1000)
Stability - RH Sensor <±1% RH/year
Response Time <10 sec typical (for 90% of the step change)
Electrical output/input
Supply Voltage 9 VDC alkaline batteries (200 hours battery life approx)
Operating conditions
Operating Humidity
   Probe, Housing, Storage
5–95% RH (non-condensing)
Operating Temperature
   Hand meter
-20 to +60°C / -4 to +140°F
Mechanical specification
Ingress Protection IP32
Housing Material - Meter Moulded polymer housing
Weight DM509 + probe: 260g / 9.17oz
DM509 + fixed measurement head: 140g / 4.94oz
DM509 + sword: 700g / 24.7oz
DM509 + tube 500mm : 800g / 19.6" : 28.2oz
Electrical Connections RH: 3-wire
T: 3-wire
Display resolution 3½ digit LCD, 10mm / 0.39" characters % RH, °C, °F, g/m3, °Cdp/°Fdp