Product Details
KVS100 Series Vibrating Fork Liquid / Solid Level Switch
Introduction
KVS100 series tuning fork level switch is a new type of level switch. It is
designed and manufactured using the principle of tuning fork
vibration. It is the base of the induction rod of the tuning fork
level switch. The tuning fork is driven by the piezoelectric wafer,
and the vibration signal is received by another piezoelectric
wafer, so that the vibration signal can be circulated and the
induction rod resonates. When the material contacts the sensor bar,
the vibration signal gradually becomes smaller, and the control
circuit outputs an electrical acceptance signal until the resonance
stops.Due to the natural principle that the sensitivity of the sensing
rod gradually decreases from the front end to the rear seat, no
error signal will be generated when the material in the tank and
the barrel are stacked upwards, touching the base of the sensing
rod (rear) or discharging.
The tuning fork generates mechanical vibrations under the
excitation of a piezoelectric crystal, and the vibration has a
certain frequency and amplitude. When the tuning fork is submerged
by liquid or solid, the vibration frequency and amplitude of the
tuning fork will change. This frequency change is detected by the
electronic circuit and outputs a switching signal.
Principle
The KVS100 series vibration fork type/level switch uses a
piezoelectric component to generate a vibration wave. When the
measured medium contacts the fork body,the frequency of the
amplitude of the tuning fork is changed, and the change isdetected
by the intelligent control circuit and converted into a
corresponding output signal. Such as: (Realy.NPN.PNP)
Features
- Customized length can reach 3m
- DPDP SPDT Relay / NPN / PNP output
- 20~250VAC / VDC, 50/60Hz
- Whole metal construction, sturdy and durable.
- Self-study function. It can study different medium density by using
buttons.
- The vibration amplitude of the fork is large, and the amplitude can
reach more than 10mm, which can shake off the low-viscosity local
hanging material on the induction rod to prevent malfunction.
- Bright red LED warning light.
- For liquid, powder, granule, thick medium measurement.
Parameters
Item | Specification |
Controller Casing Material | Aluminum alloy (IP65) |
Power Supply | 22-60VDC, 22-220VAC, 50/60Hz |
Power Consumption | DC-3W (MAX), AC-15W (MAX) |
Output | DPDT 5A/250VAC or NPN/PNP |
Operating Pressure | -1-40bar |
Installation | vertical or horizontal |
Model | KVS140 big fork body type |
Connection | G1-1/2” (customizable) |
Rod Material | SUS304 / 316 |
Operating Temperature | -40℃~130℃ |
Insertion Length | 170mm(customizable) |
Ordering Information
KVS | |
| Model | |
140 | big fork body type |
| Power and Output |
Code | Power Supply |
A | 224VDC-220VAC relay output |
B | (NPN PNP transistor output) |
| Code | Connection | Code | Size |
A | 3/4” (20A) | M | 5Kg/cm2 |
B | 1” (25A) | N | 10Kg/cm2 |
C | 1-1/2” (40A) | O | 150Lbs |
D | 2” (50A) | P | 300Lbs |
E | 2-1/2” (65A) | Q | PT |
F | 3” (80A) | R | PF (G) |
G | 4” (100A) | T | NPT |
H | 5” (125A) | U | sanitary joint |
I | 6” (150A) | W | PN1.0 |
S | customize | X | PN1.0 |
| | Y | PN1.0 |
| | Z | PN1.0 |
| | S | customize |
| Rod Length (mm) |
Note: 1. The total length of the product is affected by the function
adjustment, and the tolerance is ±5mm. 2. Features, specifications and dimensions could be modified when
necessary without prior notice. |
Company Profile
Xi'an Kacise Optronics Co.,Ltd. is a professional manufacturer of
measuring instruments , located in China xi’an City. Since 2008,
Xi'an Kacise focused on the development and production of pressure,
level and flow measuring instruments .

We have been specializing in manufacturing pressure, level and flow measuring instruments and related products for 10 years. Based on experienced technical
and management personnel, through efforts of our entire staff, we
have become a professional measuring instrument manufacturer and
solution provider. And we are continuously trying to improve
product quality.

Xi'an Kacise is qualified with ISO 9001-2008, GJB 9001B-2009, CE,
intrinsic safety explosion-proof and isolated safety
explosion-proof certificates, etc. which ensure that our products
comply with international standards.

Kacise sensors have already been exported to America, Spain,
Australia, Chile and 20 other countries and regions, and received
many favorable feedbacks. Our overseas distributers are also
increasing. We regard “reasonable prices, efficient production time
and good after-sales service” as our tenet, and hope to cooperate
with more customers for mutual development.

Our goal is simple: to sell the best products at the best prices,
and provides industry-leading customer service. We personally get
to know each of our customers, and we know how to discover the most
valuable part of our business , to help others achieve their goals.