0871LH1 Freezing-Rain Sensor
Warns of Ice Danger
Protects roads, power lines, aircraft, wind turbines
meteorología aplicaciones agua aplicaciones energía aplicaciones flujo gas y turbulencia aplicaciones infraestructuras aplicaciones suelo aplicaciones


The 0871LH1, manufactured by Goodrich, is a sensor that detects the presence of icing conditions so that appropriate actions can be taken to prevent damage to power and communication lines, to warn of road hazards, or to keep ice off wind turbine blades or a plane’s wings.

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Ventajas y características

  • Puede usarse para prevenir daños en líneas eléctricas, avisos de hielo en carretera, hielo en las alas de aviones, hielo en las palas de aerogeneradores
  • Auto descongelación si la acumulación de hielo alcanza 0.5mm


Descripción detallada

The 0871LH1 uses resonant frequencies to determine the presence of icing conditions. Its main component is a nickel alloy rod that has a natural resonant frequency of 40 kHz. As ice collects on the rod, the added mass causes the resonant frequency to decrease. When the frequency decreases to 130 Hz (or 0.02-in. layer of ice), an internal heater automatically defrosts the sensor.


Measurement Description Ice detected/no ice detected
Range State dependent (ICE = 1, NO ICE = 0)
Set Point Ice signal activates when probe ice thickness exceeds 0.5 mm ±0.13 mm (0.02 in. ±0.006 in.)
Output Format RS-422 output operates at 9600 bps.
Operating Temperature Range -55° to +71°C
Storage Temperature Range -65° to +90°C
Random Vibration 7.9 grms (DO-160C, Category E)
Shock DO-160C
Operating Voltage 18 to 29.5 Vdc
Base Diameter 7.32 cm (2.88 in.)
Base Height 3.81 cm (1.5 in.)
Strut Diameter 3.10 cm (1.22 in.)
Strut Height 2.54 cm (1.0 in.)
Plate Dimensions 7.37 x 7.37 x 0.22 cm (2.9 x 2.9 x 0.085 in.)
Rod Diameter 0.64 cm (0.25 in.)
Rod Height 2.54 cm (1.0 in.)
Weight 0.3 kg (0.7 lb)

Power Draw @ 24 Vdc

Sensing Mode 5 W (maximum)
Deicing Mode 27 W (maximum)

Operating Modes

Sensing Operating with no ice or with probe ice thickness below the set point
Deicing Operating with probe ice thickness exceeding the set point

Discrete Output Signals

Ice Signal (No Icing) Open
Ice Signal (Icing Detected) Ground
Status Signal (Operating Correctly) Ground
Status Signal (Failure Detected) Open

RS-422 Output Signals

Ice Signal
  • 1 = Ice
  • 0 = No Ice
Fail State
  • 1 = Fail
  • 0 = No Fail (OK)

Built-in Test (BIT)

Commanded Performed at initial power-up. If a failure is detected and verified, the ice detector stops detecting and annunciating icing conditions, the heaters are disabled, and a failure is annunciated.
Continuous Hardware and software BIT verifies that internal electronics are functioning properly.

Electrical Connectors

Mechanical MS27474T10B199PN
Mating MS27474T10B199SN


Nota: lo siguiente muestra información de compatibilidad notable. No es una lista de todos los productos compatibles.


Producto Compatible Nota
CR1000 (retired)
CR200X (retired)
CR216X (retired)
CR5000 (retired)
CR9000X (retired)


Producto Compatible Nota
21X (retired)
CR10 (retired)
CR10X (retired)
CR23X (retired)
CR500 (retired)
CR510 (retired)
CR9000 (retired)

Preguntas frecuentes

Número de FAQs relacionadas con 0871LH1: 3

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  1. The sensor determines if there is an ICE or NO ICE condition. If the sensor is covered in ice, it reports an ICE condition and turns on the heater to defrost itself.