CS700H-L Heated Rain Gage
Rugged, Accurate
Ideal for high-intensity precipitation, even in freezing conditions
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications


The CS700H, manufactured by HS Hyquest Solutions, is a high-end heated tipping bucket rain gage with an 8 in. orifice and a heavy duty cast aluminum base. It measures precipitation in 0.01 in. increments at temperatures down to -20°C. This heated rain gage is ideal for locations where intense rainfall events may occur, and it is used in environmental monitoring applications.

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Benefits and Features

  • Extra-heavy metal construction for durability and long life
  • Low power consumption
  • More accurate measurement of high-intensity precipitation
  • High precision—tips at 0.01-in. increments
  • Accuracy is ±3 percent at high precipitation rates of 500 mm/hr
  • Heater elements can run on either batteries or ac power


CS700H-L heated rain gage and cable
CS700H-L heated rain gage and cable
CS700H-L heated rain gage and cable
Cable for the CS700H-L heated rain gage

Detailed Description

The CS700H funnels precipitation into a bucket mechanism that tips when filled to its calibrated level. Each tip is marked by a dual reed switch closure that is recorded by a datalogger pulse count channel. After measurement, the water drains through two orifices (accepts 12 mm tubing) in the base, allowing the measured water to be collected in a separate container.

The CS700H contains an internal siphon mechanism that causes precipitation to flow at a steady rate to the tipping bucket mechanism (regardless of intensity). The siphon allows the sensor to make accurate measurements over a range of 0 to 50 cm per hour.

The CS700H includes an internal snow sensor that is activated when the air temperature drops below 4°C. If the snow sensor detects snow in the catch area (funnel), the heating elements automatically turn on and keep the funnel temperature at +10°C. To conserve power, the heater goes into a wait mode when snow has not been detected for 18 minutes. The heating element is also automatically deactivated when the air temperature drops below -20°C.


Sensor Type Tipping bucket with siphon
  • ±2% @ < 250 mm/h (9.8 in./h)
  • ±3% @ 250 to 500 mm/h (9.8 to 19.7 in./h)
Resolution 0.01 in. (0.254 mm)
Measurement Range 0 to 700 mm/h (0 to 27.6 in./h)
Humidity Range 0 to 100%
Cable Type Two-conductor shielded
Operating Temperature Range
  • -40° to +70°C
  • -20° to +5°C (for snow sensor and heater)
Output SDI-12
Main Power Voltage Requirements 10 to 30 Vdc or 12 to 28 Vac
SDI-12 Power Voltage Requirements 9.6 to 16 Vdc
Total Current Consumption
  • 6 mA @ 12 V, 0.072 W (snow sensor off, heater off)
  • 12 mA @ 12 V, 0.144 W (snow sensor on, heater off)
  • 5.8 A @ 12 V, 70 W (snow sensor on, heater on)
Drain Tube Size Both filters accept 12 mm (0.47 in.) ID tubing.
Orifice Diameter 20 cm (7.9 in.)
Height 34.2 cm (13.5 in.)
Weight 3.3 kg (7.4 lb) with 7.62-m (25-ft) cable

CS700H-AC Option Only

-NOTE- Additional specifications are provided in Phoenix Contact’s manual for the Quint-PS/1AC/24DC/10.
Model Name Quint-PS/1AC/24DC/10
AC Input Voltage Range 85 to 264 Vac
Power Consumption
  • ~2.77 A (120 Vac)
  • ~1.24 A (230 Vac)
Protective Circuitry Transient Surge Protection Varistor
Integrated Input Fuse 6.3 A (slow blow, internal)
Normal Output Voltage 24 Vdc ±1%


Power Considerations

The CS700H has two power configuration options (either AC or DC). With the AC option, a Phoenix Contact Power Supply is shipped with the CS700H. With the DC option, the CS700H is connected to a user-supplied battery. This option is ideal for remote sites using wind or solar power to recharge the battery. Battery capacity requirements vary according to the application and site location.


The base of the gage is supported by three legs. A CM240 Leveling Base and Mount or a user-supplied baseplate with leveling capability is recommended. The CM240 may be attached to a CM300-series mounting pole, or to a user-supplied 1.5 IPS (1.9-inch outer diameter, unthreaded) pipe (see Ordering Information). A concrete pad is recommended.

Wind Screen

Campbell Scientific offers the 260-953 Wind Screen to help minimize the affect of wind on the rain measurements. This wind screen consists of 32 leaves that hang freely and swing as the wind moves past them.

Datalogger Considerations

Compatible Contemporary Dataloggers

CR1000 CR3000 CR9000X CR300

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X

Frequently Asked Questions

Number of FAQs related to CS700H-L: 12

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  1. The CS700H-L has three heating elements to prevent the formation of icicles. Two of the heaters are on the base of the funnel, and one is on the base of the bucket. Because of the heating elements, this sensor requires a power supply of approximately 5 A. The SDI-12 interface of the sensor controls the heaters to come on only when needed.

  2. These rain gages don’t necessarily generate a voltage range, but rather a pulse. Depending on how the rain gage is connected to the datalogger, the gage can generate a sourcing current or a sinking current pulse.
  3. These rain gages can be connected to either.

    • When a control port is used, one lead goes to the 5 V port to provide current, and the other lead goes to a control port to detect the current.
    • When a pulse channel is used, one lead goes to the pulse port, and the other lead terminates on a ground terminal.

  4. The following are some suggestions to try:

    1. Check that there is a solid connection to the reed switch. The screws should be tight, and the wires should have a solid connection to the screws.
    2. Try switching the connection from the current reed switch being used to the secondary reed switch connection.
    3. Check that the cable is connected to the correct input on the datalogger. Take the two wires on the other end of the cable (the sensor side) and touch them together. The datalogger should register a tip. If the tip registers, the issue is with the reed switch. Replace the reed switch.
    4. If the datalogger still doesn't register a tip, try using a different cable.

  5. Not registering any tips, missing tips, or double tips.

  6. If data is not being logged correctly, there are two likely causes:

    • The reed switch has failed.
    • There is a faulty connection from the rain gage to the datalogger, typically caused by a broken conductor or corroded wiring. 
    1. Remove the housing assembly from the base by removing the three screws and lifting upward on the housing.
    2. Check the bubble level to verify the rain gage is level.
    3. Pour water through the inner funnel to wet the two bucket surfaces. Using a graduated cylinder, slowly pour 314 cc (19.16 in3) of water, over a 15 minute period, into the collection funnel. This volume of water is equal to 0.39 inches of rainfall (10 mm).
    4. After the water has passed through the rain gage, the tipping bucket should have tipped 39 times for the TB4-L or CS700-L, or 50 times for the TB4MM-L.
    5. If the rain gage fails to record the correct number of tips, return the unit to Campbell Scientific for recalibration.
  7. The 260-953 Alter-type rain gage wind screen consists of 32 heavy metal leaves that hang freely and swing as the wind moves past them. The swinging leaves act as a wind damper and help minimize the effect of wind on the rain measurements without adding additional turbulence.

  8. When a rain gage is out of calibration, it is usually because of the buildup of dirt and grime on the internal surfaces of the tipping bucket mechanism. Cleaning the internal surfaces usually brings the rain gage back into calibration. It is also possible that a rain gage is out of calibration because it is no longer level.

    To minimize the possible occurrence of calibration errors, perform routine cleaning and maintenance of the rain gage at least once every three months. The environmental conditions at a particular site may require a facility to perform cleaning, leveling, and maintenance on a much more frequent schedule.