137 Vigilant Aircraft Hygrometer

SKU: 137 Vigilant Aircraft Hygrometer Category:

The 137 Vigilant Aircraft Hygrometer is a rugged, shock mounted military qualified instrument used for the primary measurement of dew/frost point in flight or in installations with existing flow, such as wind tunnels.


  • Designed for atmospheric sciences
  • Measures dew/frost points in flight
  • Rugged shock-mounted, military qualified
  • Choice of left or right-side mounting
  • 90 to 240 Vac operating power
  • Single or three stage sensors available to fit specifications
  • 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

ETA Process Instrumentation

19 Foster Street, Bldg. #6,
Peabody, MA 01960

Tel: (978) 532-1330
Fax: (978) 532-7325

Visit Our Sister Companies

Scroll to Top