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
  • Ambient unit, reference probe
  • High temperature probe
  • Sword probe
  • 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
    Sword probe: -20 to +100°C
    Remote probe: -20 to + 150°C
    Accuracy RH @ 25°C Fixed probe: ±2% RH (10–90% RH)
    Remote probe: ±2 % RH (5–95% RH)
    Accuracy T @ 25°C ±0.2°C (Pt100 Ω 1/3 DIN direct)
    Temperature Influence ±0.05% RH/°C
    Stability - RH Sensor <±1% RH/year
    Response Time <10 sec typical (for 90% of the step change)
    ELECTRICAL INPUT/OUTPUT
    Supply Voltage 9 VDC alkaline batteries (200 hours battery life approx)
    OPERATING CONDITIONS
    Operating Temperature Hand meter 0 to +60°C
    Operating Humidity
    Probe: 5–95% RH (non-condensing)
    Housing: 5–95% RH (non-condensing)
    Storage: 5–95% RH (non-condensing)
    MECHANICAL SPECIFICATIONS
    Housing Material - Meter Plastic
    Electrical Connections RH: 3 wires
    T: 3 wires
    Ingress Protection IP32
    Weight DM509 + probe: 260g
    DM509 + fixed measurement head: 140g
    DM + sword: 700g
    DM509 + tube 500mm: 800g