Howell Instruments H9000


The H9000 Series Indicators are solid-state analog/digital gauges that measure the output of ANSI type K thermocouples or frequency from a tachometer generator or magnetic pick-up.

Because temperature and speed are two of the most critical engine parameters used in monitoring mechanical integrity, prolonged engine life is dependent upon avoiding operation at these limits. Howell’s H9000 Series Indicators accurately provide these imperative measurements. The H9000 Series Indicators supply is ±1 °C, ±0.1 %RPM: pointer accuracy is ±6 °C, ±0.6 %RPM of digital display.

H9000 Series single purpose indicators have both analog pointers and digital displays for redundancy. Maximum response time is one and one-half seconds to stabilize within ±1 °C, ±0.1 %RPM at full-scale.

Other application examples:

  • Oil Temperature
  • Oil Pressure
  • Torque
  • Fuel Flow
  • Oil Quantity
  • Engine Pressure Ratio (EPR)
  • Fuel Quantity
Power Input28 VDC nominal, 18 to 32 VDC, 115 VAC, ± 10%, 380 to 420 Hz units require 10W maximum.
Signal InputTemperature – ANSI Type K Thermocouple. Range 0 to 1200 °C (0 to 2000 °F). Frequency – 3.5 Hz to 20 KHz, 500 mV to 50 Vrms tachometer generator. Range 5.0 to 120.0 %RPM.
Digital DisplayFour, 7-segment with decimal point, green LED characters, NVG compatible per MIL-L-85762A. Brightness automatically controlled via an integral photoelectric cell.
CasePer MS33639, 2 inch diameter, 6.5 inches long, hermetically sealed. (3 inch diameter available)
Weight1.5 lbs Maximum
Connector InterfaceMIL-C-26482 and MIL-C-5052
Optional Integral Lighting5V AC/DC or 28 VDC system. White, red, blue/white, or NVG.
Optional Warning LampAn integral warning lamp can be supplied in red, yellow, orange, and NVG blue/green. Limits set to customer specifications.
CertificationTSO C43c, C49b

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