This product is no longer available and has been replaced by: CS475A-L. Some accessories, replacement parts, or services may still be available.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, 20 m maximum Distance
Services Available


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)

The "-L" on a product model indicates that the cable length is specified at the time of order.


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.)
Output Options SDI-12
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)
CR10X (retired)
CR200X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800 (retired)
CR850 (retired)
CR9000 (retired)
CR9000X (retired)

Frequently Asked Questions

Number of FAQs related to CS475-L: 4

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  1. Yes. In the Water | Level & Flow folder, there is the option to select CS475/CS476/CS477 Radar Water Level Sensor. Click to move the selection to the Selected device window, and enter the SDI-12 address.

  2. Not every sensor has different cable termination options. The options available for a particular sensor can be checked by looking in two places in the Ordering information area of the sensor product page:

    • Model number
    • Cable Termination Options list

    If a sensor is offered in an –ET, –ETM, –LC, –LQ, or –QD version, that option’s availability is reflected in the sensor model number. For example, the 034B is offered as the 034B-ET, 034B-ETM, 034B-LC, 034B-LQ, and 034B-QD.

    All of the other cable termination options, if available, are listed on the Ordering information area of the sensor product page under “Cable Termination Options.” For example, the 034B-L Wind Set is offered with the –CWS, –PT, and –PW options, as shown in the Ordering information area of the 034B-L product page.

    Note: As newer products are added to our inventory, typically, we will list multiple cable termination options under a single sensor model rather than creating multiple model numbers. For example, the HC2S3-L has a –C cable termination option for connecting it to a CS110 instead of offering an HC2S3-LC model. 

  3. Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:

    • An –LC model has a user-specified cable length for connection to an ET107, CS110, or retired Metdata1.
    • An –LQ model has a user-specified cable length for connection to a RAWS-P weather station.

    If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.

    If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.

    • –ET models terminate with the connector for an ET107 weather station.
    • –ETM models terminate with the connector for an ET107 weather station, but they also include a special system mounting, which is often convenient when purchasing a replacement part.
    • –QD models terminate with the connector for a RAWS-F Quick Deployment Station.
    • –PW models terminate with the connector for a PWENC or pre-wired system.
  4. Many Campbell Scientific sensors are available with different cable termination options. These options include the following:

    • The –PT (–PT w/Tinned Wires) option is the default option and does not display on the product line as the other options do. The cable terminates in pigtails that connect directly to a datalogger.
    • In the –C (–C w/ET/CS110 Connector) option, the cable terminates in a connector that attaches to a CS110 Electric Field Meter or an ET-series weather station.
    • In the –CWS (–CWS w/CWS900 Connector) option, the cable terminates in a connector that attaches to a CWS900-series interface. Connection to a CWS900-series interface allows the sensor to be used in a wireless sensor network.
    • In the –PW (–PW w/Pre-Wire Connector) option, the cable terminates in a connector that attaches to a prewired enclosure.
    • In the –RQ (–RQ w/RAWS Connector) option, the cable terminates in a connector that attaches to a RAWS-P Permanent Remote Automated Weather Station.

    Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact Campbell Scientific for assistance.

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