Level switch

Small tuning fork level switch

High/low fail-safe limit switches
Overflow or empty operation protection
Simple installation maintenance-free
Product description: RST71- series tuning fork (liquid) position switch has been widely used in the industrial field, it is not afraid of hanging material, not afraid of impact, high sensitivity. It uses the principle of
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Products Description
The tuning fork of level switch operated by using two piezoelectric elements built-in on vibration tube. The first piezoelectric element triggered by pulse signal that created from circuit to transport vibration energy out, and the other piezoelectric element receives the vibration and transmits it to output electric signal. While the probe contacts material, it will cause the frequency change of output signal and the vibration will hold and send out the relay on at the same time. Tuning fork of level switch provides reliable & maintenance-free for bulk solids. Just a simple mounting and calibration procedure that keep your facility in save and monitoring. This device can withstand fiercely lateral loads and static electricity.
For friendly use, Fail-safe is equipped as standard to prevent malfunction caused by power shortage.

Specification

the supply voltage	DC24V; AC220V 50HZ
the output signal: Relay output	5A 220V AC 3A 24V DC
power consumption	≤ 2W
Tuning fork vibration frequency	300±50Hz
Environmental vibration level	V.L.4
Switch signal action time	1-60S
Medium temperature range:	-20°C～220°C

Medium temperature range:	-20°C～220°C
Ambient temperature:	-20°C～80°C
Environmental humidity:	≤95%RH
Measured medium:	liquid, powder or granular solid
Measured medium density:	solid ≥0.1g/cm3 liquid ≥0.7g/cm3
The measured solid particle size:	≤10mm
Maximum liquid viscosity:	<1000mm2/s
Measured medium repose angle:	≥200
Pressure range:	≤1MPa
Shell Material:	Die Cast Aluminum Alloy
Fork body material:	1Cr18Ni9Ti
Explosion-proof grade:	DIIBT4
Shell protection class:	IP65
Connection:	1" NPT thread; Flange (user selected)