Starting at $15,719.00USD
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Edgetech Instruments

137 Vigilant Aircraft Hygrometer

Rugged, shock mounted military qualified instrument used for the primary measurement of dew point in flight or in installations with existing flow.

Starting at
$15,719.00USD
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Used in
137 Vigilant Aircraft Hygrometer 01012
137 1
137 2

• Measure dew points in flight
• Rugged shock-mounted, military qualified
• Configuration for left or right hand mounting is available
• 110VAC power
• Chilled mirror sensor selection required

Dew/Frost Point Range:-40° to +60°C (-40° to +140°F) A1 Sensor -50° to +90°C (-58° to +200°F) A3 Sensor
Dew/Frost Point Accuracy:±0.20°C (±0.36°F) nominal
Dew/Frost Point Sensor:3-wire Platinum Resistance Thermometer
(PRT),
100 ohms at 0°C, nominal
Depression:45°C (81°F), nominal, A1 Sensor
65°C (117°F), nominal, A3 Sensor
Sensor Materials:Chromium, glass, epoxy, anodized aluminum
Slew Rate:1.5°C (2.7°F)/second max, above 0°C
Repeatability:±0.05°C (0.09°F)
Hysteresis:Negligible
Precision Resolution:0.1 degrees C or F
Sample Flow Rate:0.25-2.5 liters/minute (0.5-5.0 SCFH)
Operating Temperature:Control Unit: 0° to +50°C (+32° to +122°F)
A1 Sensor: -40° to +60°C (-40° to 110°F)
A3 Sensor: -50° to +100°C (-58° to 212°F)
Display:LCD graphics backlit display
0.25-in. high digits
Voltage Output:0 to 5 VDC, scalable from -75° to +100ºC (-103° to +212ºF)
1 K ohms minimum load resistance
Current Output:4 to 20 mA, scalable from -75° to +100ºC (-103° to +212ºF)
1000 ohms maximum loop resistance
Serial Digital Communication:RS-232C compatible
9-pin D sub-miniature connector (female)
Baud Rates: 1200/2400/4800/9600/19200 Protocol: N81
Output of time, date and dew/frost point at timed Intervals
Programming of most keypad functions
Auto Balance Control:Manual initiation of ABC at any time
Automatic ABC with start time and interval programmable
from keypad or RS-232 port
Outputs programmable for Track or Hold during ABC
Physical:Shipping weight:
11 pounds (5 kg) with sensor
Dimensions:
Less shock mount base (LxWxH):
13 x 7.6 x 4.9 inches (33 x 19.2 x 12.4 cm)
With shock mount base (LxWxH):
13.1 x 7.6 x 5.8 inches (33 x 19 x 14.6 cm)
Power Requirements:90 to 240 VAC, 50-60 Hz
75 watts maximum
Fuses:90 - 150 VAC Operation: 1A, 3 AG, 250 VAC, Slo-Blo
160 - 240 VAC Operation: 1A, 3 AG, 250 VAC, Slo-Blo
Keypad:Five soft keys for setup and operation: Displayed parameter selection: °C/°F toggle: View/change time, date: digital averaging: baud rate: Manual Auto Balance Cycle initiate: Program Auto Balance Cycle for start time, interval, output
Track/Hold: Maximum Heat toggle: Maximum Cool toggle: View/change high and low limits for analog outputs: View/change Alarm parameters, high/low limits, high or low alarms, latched or unlatched relays, Reset front panel Alarm indicators (latched only).

• Atmospheric Sciences

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