Ultrasonic level switch RIZUR-900

Ultrasonic level switches RIZUR-900 are designed to control the level of liquids in open or closed tanks, including the ones under pressure, in processing units at industrial facilities of chemical, petrochemical, pharmaceutical, food and other industries. 

It can also be used as an indicator of liquid presence/absence at a predetermined height of the tank.

When the controlled media passes the set level, the level switch will emit different types of signals - "Dry contact", "Current loop", "NAMUR".

Сухой контакт
Dry contact
Токовая петля
Current loop

The level switches are not affected by the turbulent currents, foaming, and external vibrations.

Внешние вибрации
External vibrations
Турбулентные потоки
Turbulent currents

Ultrasonic level switch RIZUR-900 has increased strength.

Level switches RIZUR-900 are unique in price and quality as an alternative to the outdated level control relays, e.g. ROS 101(I), ROS 102(I), UZS, ROS-400, ROS-501(I), etc., and expensive foreign level switches, e.g., VEGASWING, Liquiphant, SITRANS, Optiswitch and other float, electrocontact, vibrating and optical switches.

One ultrasonic level switch can control up to 8 points of liquid level. Maximum rod sensor length - 6000 mm, flexible sensor length - up to 20 m. Vibration, foam and suspended solids do not influence level switch operation.

Rod probe can be manufactured from stainless steel of various brands, PTFE (for corrosive media) or any other materials (on request); wire rod probe is manufactured from composite materials.

L= up to 6 000 mm for rod probe 

L= up to 20 000 mm for wire rod probe

Сигнализатор уровня и наличия среды ультразвуковой серии РИЗУР-900
РИЗУР-900 с жестким чувствительным элементом
РИЗУР-900 с гибким чувствительным элементом

There're several mounting variants for the ultrasonic level switch RIZUR-900: side mounting, top mounting, inside the still wells or bleed-off lines, etc.


Design and operating principle

Level switch measuring principle is based on determination of acoustic impulses dampening in the sensor, which is significantly increased when the sensor is immersed into the controlled medium.

The housing and the lid are made of cast aluminium alloy (the housing can be made of stainless steel if requested). Under the lid, there are clamps for the cable inserted into the housing through the cable gland. There's a LED indicator on the switch housing to show the state of the controlled medium and the equipment's state of health.

The level switch RIZUR-900 has a sensor made of a tube with a diameter of 16...20mm. The piezoelectric transducer is located close to the housing and generates and receives ultrasonic impulses.
Сигнализатор уровня и наличия среды ультразвуковой серии РИЗУР-900
Сигнализатор уровня и наличия среды ультразвуковой серии РИЗУР-900
1. Cable gland
2. LED indicator

The level switch RIZUR-900 of 2019 model year has a self-diagnosis function for the electronics and sensor, as well as the function of sensor pollution control, which makes it possible to get information about possible further switch malfunctioning and take measures to clean the sensor in the case of operation in dirty (adhering) liquids.

This option is available only in model RIZUR-901 (one control point). The switch is equipped with two relay output signals in the «dry contact» version. In SPDT mode, one relay is activated by the liquid level, and the second - by the presence of adhesion, the presence of self-diagnosis errors or power failure. In DPDT mode both relays are activated by liquid level. In both modes, the presence of adhesion is indicated by a LED indicator light signals.

There is a control point on the housing of the level switch. If one places a magnet close to the control point than the self-diagnosis is activated and it is possible to start the level switch adjustment.
Сигнализатор уровня и наличия среды ультразвуковой серии РИЗУР-900

In accordance with the instruction manual it is possible to carry out the following settings with the help of a magnet:
• changing the switch delay time
• output signal inversion
• switch sensitivity mode selection
• activation/deactivation of the adhesion control mode and selection of response level
• calibration of the sensor's «dry» and «wet» state

Подробнее Скрыть

Media temperature,°С -196...+500
Process pressure, MPa 6,0; 10,0; 16,0; 25,0; 35,0; 45,0
Media viscosity, Pa·c up to 10
Minimum medium density, kg/m³
Accuracy, no more than ... mm 2
Number of controlled level points up to 8
Time delay, ... sec. 0,3; 1,0; 3,0; 10,0; 30,0
Supply voltage, DC 24 V or acc. to «NAMUR»
Current consumption,  no more than ;... mA
Ambient temperature, °С -55…+60 (the range can be extended up to -63 … +80 on request)
Ingress protection IP67 (IP68 on request)
Explosion protection marking 0ExiallC Т6Х, lExdllC Т6Х, without ex-protection
Installation position any kind
Materials in contact with the media 12Х18Н10Т (or different, on request))
Number of cable glands 1 or 2 (chosen at order time)
Average operation time, years 20

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