General Information

Reliable Measurement
The Model 973 Dew Point Mirror is a portable instrument equipped with an integral measuring head for both spot and continuous measurement of Dew/Frost point and temperature in air and gas mixtures. Based on the chilled mirror principle, the 973 ensures direct and accurate humidity measurement.

Full Color Touch Screen
The system uses a full color active matrix liquid crystal display with an integral touch panel. It has a high contrast ratio and a wide viewing angle for easy readability. Data is displayed in large easy to read fonts. Using the on screen buttons and menus, you can easily configure each line of the display for a variety of humidity, temperature, and pressure parameters that may be viewed in either SI or non-SI units. A simple touch of a button toggles any parameter between numeric or graph format.

Dew/Frost Determination
User configurable via the full color active matrix LCD touch screen, the 973 may be configured for measurement of dew point, frost point, relative humidity, and other parameters. The ForceFrost™ feature ensures reliable differentiation between super-cooled dew and frost.

Verifiable Calibration
Easily check the calibration at any time using the built-in Ice Test function, providing instant proof of sys-tem accuracy and integrity.

Connect and Go
The system is supplied ready for immediate use complete with built-in pump, flow meter, pressure sensor, and external temperature probe. PC connectivity for remote data collection is easy with the simple yet robust protocol of the bi-directional RS-232 port.

Abbreviated Specifications

Measuring range: 
Frost/Dew Point  -60...+20ºC
% RH  5...100%
Temperature -50...+150ºC
Accuracy: 
Frost/Dew point  ± 0.1°C
Temperature ± 0.1ºC 
Reproducibility: 
Frost/Dew Point  ± 0.05ºC 
Temperature ± 0.05ºC 
Thermoelectric Mirror Cooling: 3-stage, 80ºC depression 
Cooling: Air
Display: Active Matrix Color Graphic LCD 
Digital I/O: RS-232
Gas couplings: ¼ Swagelok 
Mirror Temperature sensor:  PRT-100
Sample gas flow rate: 0.2...1.0 l/min 
Sample gas circuit:  PTFE (Teflon) 
Operation temperature:  -10...+40ºC
Storage temperature:  -10...+40ºC
Ambient humidity: Instrument  90% RH max., non condensing 
Voltage 100...240 VAC, 50/60 Hzl 
Power Consumption  200 Watt 
Width: 440 mm 
Height: 155 mm 
Depth: 410 mm 
Weight: 12 kg