Level Transmitter/Level Switch(Powder)
Tilt Switch

Robust level switch unaffected by adhesion

Tilt switch is robust level switch unaffected by adhesion. They can be used for upper limit detection in storage silos, walkers, chutes, etc. for powder and solid materials.



1.  Not affected by adhesion or electrical characteristics of measured object. Effective when capacitance method cannot detect due to its low relative permittivity.


2. Suitable for detecting solid materials. Capacitance or paddle type may break equipment when detecting solid materials, but Tilt Switch housed in a sturdy cast metal case are safe because of their shock-resistant construction. Specific gravity is 1.0 or higher, and solid materials with a grain size of 30 mm or more can be detected.



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Features of Tilt Switch

Not affected by electrical characteristics

 Installation inside the tank

Not affected by electrical properties such as relative permittivity and conductivity

Adhesion- and

Notes on tank installation

Sensor part is housed in a sturdy cast metal case, making it resistant to shocks should they occur

Also supports detection
of powders and granules

with cross feathers

Standard product is intended for measuring materials with specific gravity of 1.0 or more and particle size of 30 mm or more. For specific gravity of 1.0 or less, use optional cross paddle type. The cross paddle type is for materials with a specific gravity of 0.6 or more and a particle size of 30 mm or more.

The above values are subject to change depending on conditions of object to be measured and environment in which it is installed.

Operating principles

Sensor (detection unit) of Tilt Switch has a built-in tilt switch. When sensor is not in contact with object to be measured, contact between A and B is closed (NC state) via an iron ball.
When sensor is inclined due to accumulation of measured object, iron ball in the inclination switch rolls and contact point between A and B is opened (NO state).
In principle, the sensor is not affected by floating dust or adhered objects.


 Principle diagram
Tilt switch detection principle

How to use?

1. Decide
mounting position

 Installation reference diagram

Avoid direct contact of sensor with an object to be fed, as impact may cause false detection or damage.
Since sensor is designed to detect inclination, install it in a location where there is enough space so that it will not hit a wall or the like even if it is inclined.

2. Mounting

 Installation reference diagram

Simply screw it to ceiling. Link chain from ceiling to detection position must be prepared by the customer.

3. Wiring

Connection diagram
A relay box is attached to cable extending from detector, so please wire from there to transducer.

4. Adjustment

 Installation reference diagram
Detection position can be easily changed on site by changing length of optional link chain.
Adjustment is completed by setting a chattering-prevention timer on the transducer.

Please refer to the instruction manual for details.

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Model lineup

PFFM-40 spec.

AMDC spec.&DWG.
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