OptiSonde Chilled Mirror Hygrometer

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Panametrics' OptiSonde hygrometer precisely analyzes humidity and temperature using chilled mirror sensing technology. This humidity analyzer is the perfect sensor of choice for laboratory and process measurements that require high precision without long-term drift.

Manufactured by: Panametrics
Model: OptiSonde Chilled Mirror Hygrometer

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Engine test cells
Environmental test chambers
Air conditioning and heat exchange coil testing
Clean rooms
Metrology labs


  • 100 - 240 VAC, 50 to 60 Hz, 60 watts
  • 18-32 VDC (bench top only)
Enclosure material
  • Wall mount: Cast aluminum
  • Bench top: Aluminum body with plastic front bezel
  • Wall mount: 26.6 x 20.8 x 11.4 cm (h x w x d)
  • Bench top: 9.4 x 20.3 x 22.4 cm (h x w x d)
  • Wall mount: 2.4 kg
  • Bench mount: 1.4 kg
Ingress protection rating
  • Wall mount: IP-65
  • Bench top: IP-20
Front panel keys Rubber function keys—may be locked out via software
Dew point range Dependent on sensor used
Dew point accuracy ± 0.2°C dew/frost point
Dew point repeatability 0.1°C
Temperature accuracy ±0.15°C
Other humidity parameters The range and accuracy of absolute humidity (mH20/v) and relative humidity (e/esat) readings are based on the fundamental dew point and temperature measurements. The range and accuracy of mass (ppmw) and volume (ppmv) ratios are calculated based on the fundamental dew point measurement and pressure and gas molecular weight constants.
Repeatability 0.05°C
Display Two simultaneous parameters with 0.01°C resolution. "Dew Layer Thickness," "Control," "Alarm" and "Service" indicators
Analog output Two linear simultaneous parameters. 0/4 to 20 mA (isolated) with 250? max load
Alarm Form C (SPDT) 7 amp, 30 VDC (resistive load)
Digital interface RS-232
Cooling slew rate 1.5°C/sec
Self cleaning and balancing Via patented PACER cycle. PACER may be programmed to run on an elapsed time or daily timer.
Operating temperature Analyzer: -10°C to 60°C
Data logger Capable of recording eight parameters, time and date for a minimum of 100 days at sample rate of one second.
Operating humidity0 to 95% RH non-condensing
MTBF Five years of continuous operation
Certifications CE Approval
Electrical I/O Power: AC IEC receptacle for bench top and screw terminal blocks for wall mount. Chilled mirror sensor: keyed connector/cable. Temperature sensor, keyed connector/ cable. RS-232: SUB-D-9. Analog outputs: screw terminals
Carrying case Optional hard shell carrying case with die-cut foam for bench top unit and accessories