SO-121VM ver. A

SO-121VM Icing Detector Overview

The SO-121VM is an aircraft icing detection system designed to identify ice formation on airplanes and helicopters during flight and ground operation. The system detects icing conditions at an early stage and provides warning signals to the flight crew. It operates as part of onboard safety systems and ensures reliable performance under aviation environmental conditions.

SO-121VM Detection Function

The system detects ice accretion on an external sensor and converts physical changes into electrical signals. Based on these signals, it generates warnings and control commands for onboard systems. The detector ensures timely activation of anti-icing measures and supports safe aircraft operation in icing environments.

SO-121VM Aircraft Application

The SO-121VM is used on various aircraft and helicopters including Mi-8, Ka-32, An-38, An-74, Il-96-300 and Mi-26. It is integrated into anti-icing systems, warning systems, and flight data recording systems, providing automatic and continuous monitoring of icing conditions.

SO-121VM System Configuration

The system consists of an ice detection sensor DSL-40T, an electronic converter PE-11M, and a mounting frame RM-5. One or two sets can be installed depending on aircraft configuration. The product is also known under alternative designations SO-121VM, СО-121ВМ.

Product Type: Aircraft icing detection system
Function: Detection of icing conditions and generation of warning and control signals
Application / Where Used: Aircraft anti-icing systems, warning systems, flight data recording systems
System Composition: DSL-40T sensor, PE-11M electronic converter, RM-5 mounting frame
Detection Principle: Resonant frequency change of membrane sensor
Sensitivity: Ice thickness up to 0.5 mm
Number of Sets per Aircraft: 1 or 2
Sensor Installation: External fuselage mounting (left/right cockpit area)
Electronic Unit Installation: Internal mounting on RM-5 frame
Output Signals: Warning signals and control commands
Operating Voltage: 27 ±3 V DC
System Current Consumption: Not more than 15 A
Command Output Voltage: 27 ±3 V DC
Command Delay after Ice Disappearance: 140 ±40 s
Generated Commands: POS, BAR, Icing, Heating
Weight: Single set ≤ 3.4 kg; dual set ≤ 6.6 kg
MTBF: Not less than 7000 h
Technical Documentation: SO-121VM Technical Documentation

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.