The CS475, CS476, and CS477 series of radar-based water-level sensors brings a highly accurate innovation to Campbell Scientific's array of sensors. The CS476 is built for higher accuracy and a longer range. Mounted above the water surface to be measured, the sensors use radar—short microwave pulses—to detect the distance from the sensor to the top of the water. Changes in the level of the surface are measured and used to calculate depth, flow rate, or volume of the water. The sensors do not come into contact with the liquid, avoiding corrosion, contamination, and debris damage. That, and the fact that there are no moving parts, make the sensors very low maintenance.

Features
Highest accuracy of our radar-based level sensors 
High-frequency, economical, low-maintenance radar gauge 
Compatible with all SDI-12 dataloggers 
Low power use 
Wide operating-temperature range 
Accuracy valid over entire measurement and operating-temperature range 
NEMA rated 4x 
Use for rivers, lakes, retention ponds, or reservoirs 
Specifications
Measurement Range: 2 inch to 98 ft (50 mm to 30 m) 
Accuracy: ±0.1 in. (±3 mm) over entire measurement range 
Resolution: 0.04 in. (1 mm) 
Output Protocol: SDI-12 
Radar Frequency: ~26 GHz 
Electromagnetic Compatibility: Emission to EN 61326; Electrical Equipment Class B 
Pulse Energy: 1 mW maximum 
Beam Angle: 8° (4-in dia horn) 
Input Voltage: 9.6 to 16 Vdc 
Surge Protection: 1.5 KVA 
Typical Current Drain with 12 V Power Supply 
Sleep: 4.7 mA 
Measurement: 14 mA 
Temperature Sensitivity: average TK: 2 mm/10 K, max 5 mm over the entire temperature range of -40° to +80°C 
Vibration Resistance: Mechanical vibrations with 4 g and 5 to 100 Hz 
Rating: NEMA 4x 
Housing: Aluminum, coated IP66/68 
Horn Material: 316L stainless steel
Producing Area:USA