Dew-Point Hygrometer

Easidew Online

Moisture Measurement with Configurable Display


Easy to install and maintain, the Easidew Online Hygrometer measures and displays dew point and moisture content for use in a wide range of moisture applications. The Easidew Online display provides analog, digital, and dual relay alarm outputs. This hygrometer is compatible with the entire Easidew Transmitter range to provide local readings as well as re-transmitted control signal.

  • Measurement range -100 to +20 °C (-148 to +68 °F) dew point
  • Dew point or ppmV moisture content output
  • Accuracy ±2 °C (±3.6 °F) dew point
  • 4 to 20 mA output
  • Modbus RTU over RS485 output
  • Dual configurable alarm outputs
  • Choice of AC or DC Power Supply
  • Sample block and cable included
  • Traceable 13-point calibration certificate
Performance Specifications
Measurement Range-110 to +20°C (-166 to +68°F) dew point; -100 to +20°C (-148 to 68°F) dew point;
non-standard dp ranges and ppmV ranges available on request
Accuracy±2°C (±3.6°F) dew point
Response Time5 mins to T95 (dry to wet)
Repeatability0.5°C (0.9°F) dew point
Sensor CalibrationTraceable 13-point calibration certificate
Electrical Specifications
Online Output Signals4-20 or 0-20 mA, Modbus RTU over RS485; dual programmable relay alarms
Online OutputDew point or moisture content
Maximum Analog Output Scaled RangeDew point: -110 up to +20°C (-166 up to +68°F); Moisture content in gas: 0 up to 3000 ppmV
Online Supply VoltageAC: 85 to 264V; DC: 24V
Online Current Consumption60 mA maximum
Electrical SafetyEN61010-1
Operating Specifications
Operating TemperatureSensor: -40 to +60°C(-40 to +140°F); Monitor: 0 to 50°C (+32 to +122°F)
Compensated Temperature RangeSensor: -20 to +50°C (-4 to +122°F); Monitor: not applicable
Storage TemperatureSensor: -40 to +60°C (-40 to +140°F); Monitor: -10 to 60°C (+14 to +140°F)
Operating Pressure45 MPa (450 barg / 6527 psig) maximum
Sensor Flow Rate1 to 5 Nl/min mounted in standard sampling block; 0 to 10 m/sec direct insertion
Mechanical Specifications
Ingress ProtectionSensor: IP66 in accordance with standard BS EN 60529:1992+A2:2013;
NEMA 4 protection in accordance with standard NEMA 250–2014
Monitor: IP65 (NEMA 4X) front panel only
Sensor Oxygen ServiceOptional: Cleaned for enriched oxygen service
Sensor Housing Material316 stainless steel
DimensionsSensor: L=132mm x ø45mm / L=5.2” x ø1.77” (with connector cable)
Monitor: 1/8 DIN Case, 96 x 48 x 85mm / 3.78 x 1.89 x 3.35” (w x h x d)
Filter (Sensor Protection)Standard: HDPE <10μm
Optional: 316 stainless steel sintered guard <80μm
Sensor Process Connection5/8” - 18 UNF
KF40 Flange AccessoriesFlange for 5/8” 18 UNF process connections
Sensor Weight150 g (5.29 oz)
Sensor Electrical ConnectionsMiniDIN 43650 form C
Online Sensor Cable0.8, 2, 5, 10 meter (2.62, 6.5, 16.4, 32.81 ft) connector/cable available
Sensor Diagnostic Conditions
(factory programmed)
Sensor fault: 23 mA
Under-range dew point: 4 mA
Over-range dew point: 20 mA

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