The LRNH41021 float switch is a horizontally mounted liquid level switch designed for industrial applications requiring a simple and reliable solution. When the liquid level changes, a magnet located in the float actuates a reed relay, ensuring precise and repeatable switching. The switch is supplied as a normally open contact as standard, while conversion to a normally closed contact is possible simply by rotating the entire switch by 180°.

The switch body is made of an aluminium alloy, while the float is manufactured from durable nylon 6.6 (blue), ensuring mechanical strength as well as compatibility with a wide range of liquids. Installation is carried out exclusively from the outside of the vessel using a ½" NPT thread, with 0.5 m connection leads. Typical applications include monitoring the level of oils, diesel fuel, coolants or water solutions in industrial tanks and machinery.

Key features

Actuates the reed relay contactlessly by means of a magnet in the float for maintenance-free operation
Allows selection of normally open or normally closed contact by rotating the switch by 180°
Withstands operating temperatures from -30 to +130 °C for use in demanding industrial conditions
Mounted from the outside of the vessel using a ½" NPT thread, with no need to enter the tank
Resistant to shocks of 50 g for 11 ms and vibrations in the 35–500 Hz range
Switches circuits up to 250 V AC / 1 A for direct control of signalling devices or pumps

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IP Rating	IP 65
Power Supply	250 VAC, 100 VDC
Temperature	-30...130 °C
Weight	0.50 kg

Honeywell LRNH41021 horizontal float switch (LRNH41021)

Honeywell LRNH41021 horizontal float switch (LRNH41021)

Parameters and catalogs

Key features