Displacement sensors
CMG-D21 Displacement sensor
Measures linear displacement and crack opening. An RS-485 digital output connects instruments into a shared measurement line.
Application
Application and connection
CMG sensors monitor crack and expansion-joint opening, as well as relative vertical and horizontal displacement between structural elements.
The CMG-D21 RS-485 digital output allows up to 20 sensors on one measurement line.
Technical documentation
Operating manual (RU)On the manufacturer’s website (RU)Parameters
Technical specifications
- Displacement range
- 10/25/50/100/150/250/300 mm
- Primary transducer type
- Potentiometric
- Permissible displacement error relative to span
- ±0.1%
- Ingress protection
- IP65
- Temperature compensation
- Available
- Digital output
- RS-485
- Data communication protocol
- Modbus
- Sensors per RS-485 line
- ≤ 40
- RS-485 line length, m
- ≤ 800
- Operating temperature range
- −52…+60 °C
- Supply voltage (digital sensors)
- 9-28 V
Key manufacturer data is shown. Range, interfaces, and supplied components depend on the selected version.
Full manufacturer data (RU)Descriptions, specifications, and images: NTP Gorizont materials.Manufacturer resources (RU) ↗
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