Model: 0871LH1

Ice Detector

Special Features:

Output format: rs-422 output operates at 9600 bps; input voltage: 22 to 29.5 vdc; sensing mode: 5 w max; delcing mode: 27 w max; temperature range: operating: -55 degree to 77 degree celcius; storage: -65 degree to 90 degree celcius; random vibration: 7.9 grm (do-160c category e) ; base diameter: 2.88 in; base height: 3.81 in; plate size: 2.9x2.9x0.085 in; operating modes: sensing: operating with no ice or with probe ice thicknes below the set point.Deicing: operating with probe ice thickness exceeding the set point.

Properties:

Ac Voltage Rating
24.0 volts
Usage Design
Field and aircraft
Design Type
Nontripod mounting
Unpackaged Unit Weight
0.7 pounds
Media Detected
Ice and water
Part Name Assigned By Controlling Agency
Freezing-rain sensor
Functional Description
Determine the presence of icing conditions. Its main component is a nickel allow rod that has a natural resonant frequency of 40khz. As ice collects on the rod, the added mass cause the resonant frequency to decrease. When the frequency decreases to 130h (or 0.02-in layer of ice) an internal heater automatically defrosts the sensor.
NSN
6340-01-643-7756
Part Number
0871LH1
Description
Detector,ice
CAGE
59885

A device designed to detect icing conditions and provide an ice warning signal when the ice accretion reaches a preset level. The device may also transmit an electrical signal which can be used to control operation of the ice protection system.

Part 0871LH1 NSN 6340-01-643-7756

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
36760
FIIG:
T394-A
Concept No.:
App. Key:
AA
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
A
ESD:
A
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8531900002
  • SITC: 77885
  • End Use: Electric apparatus
  • NAICS: 335999
  • USDA: 1

Freight Class: Parts of electric sound or visual signaling apparatus other than printed circuit assemblies, nesoi

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