SSD120 Nano Altitude Encoder | 30,000 ft

$431.15 excl. Vat

1 in stock (can be backordered)

SKU: SSD120-30N Category: Tags: ,


The SSD120-(XX)N Series Nano are all solid-state Altitude Encoders. These devices provide a rugged and reliable means of measuring air pressure and converting this measurement into the ICAO parallel data as set forth in the International Standard for Pressure Altitude Transmission (Gray Code output). In accordance with U.S. National Standards for Common System Component Characteristics for the I.F.F. Mark X (SIF)/Air Traffic Control Radar Beacon System SIF/ATCRBS.

Additional information

Weight 0.3938 lbs
Dimensions 3.42 × 2.46 × 1.34 in


The SSD120-30N model:

  • -1,000 ft — 30,000 ft altitude range
  • Includes mounting bracket, mating connectors with cable clamps, and installation kit


  • Dual 1/8-27 NPT static port inlets
  • One ICAO pressure altitude Gray code output
  • Optional two or five RS-232 compliant data outputs
  • Serial ports may be installer configured to transmit separate data protocols (message and baud data)
  • Power, ground, and data I/O lines provided on industry standard D-miniature connectors
  • Constructed with corrosion-resistant aluminum housing


5.9 oz (low altitude)
6.3 oz (high altitude)

Altitude ceiling:
30,000 to 42,000 ft (low altitude)
50,000 to 100,000 ft (high altitude)

ICAO Gray Code output:

RS-485 output:
No (except for SSD120(XX)N-RS model)

Operating voltage:
12VDC @ 220mA / 28VDC @ 270mA (low altitude)
12VDC @ 55mA / 28VDC @ 60mA (high altitude)

Low operating temperature:
-20°C / -55°C (E models)

High operating temperature:

Wet environment:

Electrical Connector:
D-Sub miniature 15-pin, SSD120-(XX)N
D-Sub miniature 15-pin & 9-pin, -RS232 (low/high models)
D-Sub miniature 15-pin plug & 15-pin recept, -RS models

Static line connection:
Dual 1/8-27NPT (low altitude)
Dual 1/8-27NPT or 1/8 Tube Swivel Fitting (high altitude)


Click to Download Data Sheet

Click to Download Owner/Installation Manual

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