RK5, RK7 - Radiation covers

• UV resistant plastic lamellas with low thermal conductivity and high reflectivity

• The basic version of the RK contains 5 or 7 slats

• Minimum airflow resistance

• Easy and fast clamping of the sensor in a plastic collet

• Included stainless steel holder for attaching the agency to the mast

• Extensive range of suitable sensors and transducers

Use and basic description

Radiation covers RK5 and RK7 are designed to protect temperature and relative humidity sensors from the effects of radiant heat radiation and rain. The use of a radiation shield minimizes the temperature measurement error that would otherwise occur on a sunlit temperature sensor.

The delivery of the radiation cover also includes a stainless steel universal holder, which can be attached both to a vertical surface and to a pole with a diameter of 1.5 "to 2.5". A stainless steel clamp of suitable size can be ordered together with the delivery of the radiation cover.

The compact design and large space inside the housing allow these covers to be used for many other applications.

Mechanical design of RK

Radiation shields are made of special plastic with high reflectivity for incident radiation, have low thermal conductivity and are long-term resistant to both rain and wind and UV radiation.

The shape of the radiation shield and their arrangement prevents the impact of direct thermal radiation on the sensor and minimizes the effect of reflected radiation. The passage of air to the sensor, on the other hand, is almost unlimited.

Unlike the RK5 cover, the RK7 radiation cover contains a double solid lamella on the top of the cover for better protection of the sensor against radiant radiation. This cover also has a higher internal space for the sensor given by another lamella located in the body of the cover.

Sensor mounting bracket

The temperature, relative humidity or other combined sensor is attached to the radiation cover RK5 (RK7) by means of a screw lamella clamp, which is attached in the middle of the stainless steel sensor holder and is freely accessible to the user from the bottom of the holder. This way of mounting the sensor allows its easy and quick replacement in case of damage.

The maximum diameter of the inserted sensor is 20 mm in the standard version of the holder. Brackets with a larger hole for more robust sensors can be supplied on request. It is also possible to increase the number of lamellae, if required by the length of the considered sensor.

Types of sensors adapted for installation in radiation shields RK5, RK7:

Pt100-XM: air temperature (±0.3 °C)
encapsulated Pt100-A sensor without electronics, four-wire connection to the measuring unit with PUR cable

TEP01: air temperature (±0.3 °C)
Precision sensor with Pt100-A sensor, RS485 output (FINET and Modbus RTU), connection via M12/4 connector or PUR cable

RVT80: relative humidity (±1.8%) and air temperature (±1 °C)
Sensor with SHT85 sensor, RS485 output (FINET and Modbus RTU), connection via M12 4 connector

RVT81: relative humidity (±1.8%) and air temperature (±0.3 °C)
Relative humidity sensor with SHT85 sensor, temperature measurement with Pt100-A sensor, RS485 output (FINET and Modbus RTU), connection via M12 / 4 connector

RVT12: relative humidity (±0.8%) and air temperature (±0.1 °C)
High-precision relative humidity and air temperature sensor with combined ROTRONIC sensor, output 2x 0 to 1 V DC, connection via M12 / 4 connector

RVT13: relative humidity (±0.8%) and air temperature (±0.1 °C)
High-precision relative humidity and air temperature sensor with combined ROTRONIC sensor, RS485 output (FINET and Modus RTU), connection via M12 / 4 connector

ATM01: atmospheric air pressure (±1 mbar) Atmospheric air pressure sensor, RS485 output (FINET and Modus RTU), connection via M12 / 4 connector

ATM11: atmospheric pressure (±1 mbar) and air temperature (±0.3 °C)
Atmospheric pressure and air temperature sensor, RS485 output (FINET and Modus RTU), connection via M12 / 4 connector

Recommendations for the location of the agency

Radiation covers RK5 and RK7 are designed for their permanent placement in the outdoor environment. In order for the cover to perform its function well, follow the following recommendations when installing it:

• Install the cover in places with good airflow. This will increase the accuracy of the measured air temperature

• Avoid placing the cover over large dark areas and massive structures (solar panels, asphalt surfaces, sheet metal roofs, etc.)

• Keep a sufficient distance from water jets, fountains and other sources of splashing water

• Do not place radiation shields near air conditioners and vents

• Reliable and accurate measurements will be difficult to perform near sources of electromagnetic interference (electrical power lines, power motors, ...)

Service and maintenance

Radiation covers RK5 and RK7 do not require any other regular maintenance except for possible dust removal from individual lamellas. The best way to remove long-term dirt is with a cloth soaked in soapy water.

Documentation: 

Datasheet

RK5, RK7

Download: 

Price list

Price List 2024