User Guide

Quick guide – switches with circular electronic unit 08 December 2021

Standard switches available from HB-products

Liquid switches

Oil Switches

Quick guide

All liquid level switches with circular electronic unit HBSC2, HBSR, HBOR & HBSO

Functionality and labelling:

The switches are used for detecting liquid in gas or air (HBOR detect oil in liquid

ammonia). The mechanical elements have different design because they are

optimized to different liquids. The switches use the capacitive measuring principle

and react to the difference in dielectric constant between liquid and gas.

The switches have different calibration and parameter settings in the electronic

unit, but unit is the same. The settings cannot be changed by the user, and it must

match the mechanical part. Switches delivered after September 2020 has a build

in heater which will be in operation below 5°C to keep the sensor dry

The switches are delivered as NO/NC and NPN/PNP connection. The switches

setting is printed on the small silver label on the switch together with the type

code. On the same label you find a combined version number and manufacturing

date and in second row a unique production number.

Version: VU10 date: 080319 DDMMYY

Production no. 400000

Type: HBSO1 configuration: PNP/NO

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Quick guide Standard switches available from HB-products All liquid level switches with circular electronic unit HBSC2, HBSR, HBOR & HBSO Liquid switches Functionality and labelling: The switches are used for detecting liquid in gas or air (HBOR detect oil in liquid ammonia). The mechanical elements have different design because they are optimized to different liquids. The switches use the capacitive measuring principle and react to the difference in dielectric constant between liquid and gas.
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LED indication Electrical connection 4 x red LED´s indicate liquid/oil detection. 4 x green LED´s flashing indicate no detection, but sensor is active. 4 x red flashing LED´s indicate no connection to mechanical unit. The switch is predefined as NO (normally open) or NC (normally closed) and this refers to the contact in the switch, in dry condition. The switch is either PNP or NPN type and the connection must be done according to the drawing.