This product is no longer available and has been replaced by: CS475A-L. Some accessories, replacement parts, or services may still be available.
CS475-L Radar Water-Level Sensor, 65 ft Maximum Distance
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The CS475 is a radar-ranging sensor that monitors water level of rivers, lakes, tidal seas, and reservoirs. It can measure distances up to 20 meters. The CS475 outputs a digital SDI-12 signal to indicate distance and stage. Many of our dataloggers can read the SDI-12 signal.

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Benefits and Features

  • FCC approved for outdoor use (FCC ID number MOIPULS616263)
  • Ideal for areas where submersed sensors can be damaged due to corrosion, contamination, flood-related debris, lightning, or vandalism
  • Compatible with most Campbell Scientific data loggers
  • Low maintenance—no moving parts significantly reduces maintenance cost and time
  • Low power consumption
  • Rugged enough for harsh environments—NEMA rated 4X
  • Wide operating temperature range (-40° to +80°C)


Detailed Description

The CS475 emits short microwave pulses and then measures the elapsed time between the emission and return of the pulses. The elapsed time measurement is used to calculate the distance between the sensor and the target (e.g., water, grain, slurry). The distance value can then be used to determine depth.


Compliance FCC approved for outdoor use (FCC IC number M01PULS616263)
Measurement Range 50 mm to 20 m (2 in. to 65 ft)
Accuracy ±5 mm (±0.2 in.) over entire measurement range
Resolution 1 mm (0.04 in.)
Radar Frequency ~26 GHz
Electromagnetic Compatibility Emission to EN 61326; Electrical Equipment Class B
Pulse Energy 1 mW maximum
Beam Angle 10°
Input Voltage 9.6 to 16 Vdc
Surge Protection 1.5 KVA
Operating Temperature Range -40° to +80°C
Temperature Sensitivity
  • Average TK is 2 mm/10 K
  • Maximum 5 mm (over the entire temperature range of -40° to +80°C)
Vibration Resistance Mechanical vibrations with 4 g and 5 to 100 Hz
Housing Rating NEMA 4x
Housing Material Aluminum, coated IP66/68
Horn Material PVDF encapsulated plastic
Typical Sleep Current Drain 4.7 mA (with 12 V power supply)
Typical Measurement Current Drain 14 mA (with 12 V power supply)
Side Cap Diameter 8.6 cm (3.4 in.)
End Cap Diameter 8.6 cm (3.4 in.)
Horn Diameter 7.5 cm (3 in.)
Head Width 11 cm (4.3 in.)
Horn Length 13.7 cm (5.4 in.)
Total Length 26.6 cm (10.5 in.)
  • 1.7 kg (3.8 lb) without bracket
  • 2.3 kg (5 lb) with bracket


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000 (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR9000 (retired)
CR9000X (retired)

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