What products are involved?
All Rheonics sensors, transmitters and cables that have an IP rating.
What is the purpose of this article?
To explain the meaning of IP ratings, its digits and the protection levels Rheonics products have.

1. IP Ratings overview

IP (Ingress Protection or International Protection Mark) from IEC60529, rates the protection against instrusion of solids, accidental contact, dust, water and steam into mechanical housings and electrical enclosures.

Categories are based on the use of two digits, which have specific meanings each, as follows.

Figure 1: IP rating digits meaning.

2. What does Rheonics offer?

Rheonics sensors are divided in three main parts, the sensor electronics, cable and probe. Each have an specific IP rating as shown in next image.

Figure 2: Rheonics sensor electronics, cable and probe IP protection rating.

Rheonics SR-sensor probes have an IP69K rating.  Table 1 descibes in more detail the protection ratings and Rheonics products.

Figure 3: SRV IP69K inline viscometer - other process connection variants available.

Figure 4: SRD IP69K inline density and viscosity probe - other process connection variants available.

Review all Rheonics sensor process connection variants here.

Table 1: Rheonics devices and IP ratings

Rheonics DevicesIP RatingProtection level descriptionNotes/Considerations
SME-DRM sensor electronics for mounting on DIN rail, used in cabinets

Protection against solids greater than 1 mm. No protection against water and any fluid.

For indoors installations or to be installed in cabinets.

SME-TR, sensor electronics in transmitter housing 

SME-TRD, sensor electronics in transmitter enclosure with display

IP66Total protection against intrusion of dust and solids. Protection against temporary flooding.
For indoors and outdoors installations.
SRV, inline viscometer (all variants)

Sensor probe body is hermetically sealed and offers complete protection against intrusion of dust, solids and high pressure water or steam into the internal components. 

Sensor cable and M12 connector with IP69K rating are needed for complete protection.
SRD, inline density and viscosity probe
DVP, HPHT density and viscosity meter
DVM, HPHT density and viscosity module

Sensor cables with anM12 connector are connected to the probe back end. The IP protection of the cable vary between variants (standard, Ex, High-Temperature, etc.) and will influence the protection rating of the sensor once it is installed. Standard cables have an IP rating of IP68, but IP69K cables are also offered.

To have an IP69K sensor, both the probe and cable should be rated with such protection.

Review all cable variants in this articleRheonics sensor cable and connection variants.


[1]: IEC 60529

[2]: https://rheonics.com/products/inline-viscometer-srv/

[3]: https://rheonics.com/products/inline-density-meter-srd/

[4]: https://rheonics.com/products/inline-gas-lng-density-meter-dvp/

[5]: https://rheonics.com/products/hpht-pvt-density-meter-viscometer-dvm/

[6]: https://rheonics.com/electronics-and-communication/