Single Stage Chilled Mirror_ Two Stage Chilled Mirror

Optica Chilled Mirror Hygrometer

Single Stage
Chilled Mirror Sensor

Dual Stage
Chilled Mirror Sensor

The Optica series chilled mirror hygrometers offer traceable humidity and temperature measurements for the connected generation. Now humidity reference data is accessible from anywhere, anytime within a browser over the internet or your intranet.

The Optica measures dew point temperature by regulating the temperature of a polished metal mirror by the use of optical feedback such that a constant mass of dew or frost is maintained. The temperature of the mirror is measured with a precise PRT and is by definition equal to the dew or frost point.

Dew/Frost Point Range: -35°C to 25°C
Dew/Frost Point Accuracy: Standard: ±0.2°C

A fundamental dewpoint measurement is a primary measurement used as a transfer standard for calibrating other humidity instruments and sensors. Chilled mirror hygrometers such as the GE General Eastern Optica Series are used in standards and metrology labs as well as in industrial applications where precise and repeatable humidity measurement and control is required. The inherent accuracy and long term stability provides many advantages over other types of humidity measurement technologies.

Applications:

Calibration labs
Process control
Clean rooms
Environmental test chambers
Precision HVAC monitoring and control
Fuel cells
Heat exchanger and refrigerant coil calorimeters
Thermal processing/heat treating
Semiconductor manufacturing
Storage areas
Pharmaceutical validation chambers
Engine test cells and emissions testing
Aircraft engines and turbines

OptiSonde
Bench Top or Wall Mount
Chilled Mirrors

OptiSonde

The GE General Eastern OptiSonde Chilled Mirror Hygrometer utilizes either a bench or wall mounted analyzer with a single or two-stage chilled mirror sensor and PRTD to display and transmit a variety of parameters, such as dew point, relative humidity, dry bulb, wet bulb, absolute humidity, volume ratio, and mass ratio, making the GE General Eastern OptiSonde chilled mirror hygrometer a flexible instrument for a wide variety of applications.

Applications

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

General Eastern 1111H Single Stage Chilled Mirror

Sensing Element
Four-wire 1/3 Class A DIN 43760 RPT, 100 S@ 32°F (0°C)

Dew/Frost Point Accuracy
Standard: ±0.36°F (±0.2°C)
Optional:±0.27°F (±0.15°C)

Sensitivity: >0.05°F (>0.03°C)
Repeatability: ±0.09°F (±0.05°C)
Hysteresis: Negligible

Cooling Stages
Single stage thermoelectric cooling (TEC) module

Auxiliary Cooling
Not applicable

Depression
81°F (45°C) at 77°F (25°C) dry bulb and atmospheric pressure

Typical Measurement Range
5°F to 77°F (-15°C to 25°C) dew/frost point (Td) in air @77°F (25°C) and atmospheric
pressure. Equivalent to 5%to 100% RH

General Eastern D2 Two Stage Chilled Mirror

Sensing Element
Four-wire 1/3 Class A DIN 43760 RPT, 100 S@ 32°F (0°C)

Dew/Frost Point Accuracy
Standard: ±0.36°F (±0.2°C)
Optional: ±0.27°F (±0.15°C)

Sensitivity: >0.05°F (>0.03°C)
Repeatability: ±0.09°F (±0.05°C)
Hysteresis: Negligible

Cooling Stages
Two-stage TEC module

Auxiliary Cooling
Not applicable

Depression
117°F (65°C) at 77°F (25°C) and atmospheric pressure

Typical Measurement Range
31°F to 77°F (-35°C to 25°C) dew/frost point (Td) in air @77°F (25°C) and atmospheric pressure. Equivalent to 0.7%to 100% RH.

Humilab Humidity Generator

Humidity Calibration Chamber - Portable

The Humilab™ is a NIST traceable relative humidity generator and calibration chamber that is continuously monitored by a chilled mirror hygrometer and precision RTD. The system is water jacketed for thermal stability and facilitates cost-effective calibrations of humidity sensors, probes, transmitters, recorders and data loggers.

Precise: ±0.2% RH Stability Accurate: ±1% RH from 10 to 70% RH & ±1.5% RH from 70 to 90% RH.

The Humilab relative humidity generator and calibration chamber employs the time-proportioned divided flow method to generate relative humidity values from 10% to 90% RH. Unlike other humidity chambers that use secondary %RH sensors, pressure transducers, or wet/dry bulb temperature sensors, the Humilab has a built-in primary humidity reference standard. %RH is calculated from the fundamental chilled mirror dew point and platinum RTD temperature measurements. The chilled mirror sensor and RTD are in the same environment as the devices under test. The relative humidity is controlled, regulating a fraction of a constant flow of dry air through a saturator. The dry air is produced with an internal pump and desiccant cartridge. The air streams are temperature-conditioned and mixed to maintain the desired RH level in the test chamber.

Applications:

Calibration Labs
HVAC and BAS Transmitters
Pharmaceutical Instruments
% RH Data Loggers
% RH Recorders
Industrial Humidity Probes
Test Humidity Sensors
Metrological & RadioSonde Sensors