• Name: compact tuning fork switch
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Product Introduce

AFTL tuning fork vibration level switch is caused to vibrate by the resonance

of the piezoelectric crystal. When effected by the material damping, the amplitude

suddenly  reduces,  then  the  frequency  and  phase  change  significantly.  These

changes will be detected by the internal electronic circuit, and be transformed into

a switching signal output. The product can monitor, control and alarm the high and

low bit of tanks. Also it is suitable for a variety of liquid, powder, granular solid. It is

practical,  simple,  reliable,  adaptable and maintenance-free. The tuning fork

and output have working condition and diode indicator, which can be adjusted as

habit. Also it has two power supply input modes(220V AC and 24V DC) and many

power supply output modes(DC output type, DC voltage output type, relay contact

output type). All types have high and low alarm sets, which can be done sensitivity

setting according to the situation.

Technical Parameters:

 medium temperature range: -30 ° C to 150 ° C

 ambient temperature: -20 ° C to 80 ° C

 ambient humidity: ≤ 95% RH

 measured medium: liquid, powder or granular solid

 measured medium density: solid ≥ 0.1g/cm3, liquid ≥ 0.7g/cm3

 measured solid particle size: ≤ 10mm

 maximum liquid viscosity: <1000mm2 / s

 measured medium repose angle: ≥ 200

 pressure range: ≤ 1MPa

 shell material: die-casting aluminum alloy

 fork material: 1Cr18Ni9Ti

 shell protection: IP65

 connection: 1 "NPT thread / flange (two ways)

 electrical parameters:

1: supply voltage: 24 V DC; 220V AC 50Hz

2: output signal: relay output double-pole double-throw (DPDT)

contact capacity: 8A 220V AC 4A 24V DC

3: power consumption: ≤ 2W

 tuning fork vibration frequency: 300 ± 50Hz

 ambient vibration level: V.L.4 acceleration is not more than 1g

 switch signal operating time: 1-60s

 

Electrical Connection

red light: power indicator.   green light: fork status indicator.

1, 2 terminals: 220V AC

3: ground

4: DC 24V +

5: DC 24V -

6, 7, 8, 9, 10, 11 terminals are relay output contacts.

Tuning Fork Switch Ordering Information Sheet

 

Model

Name

AFTL

Tuning Fork Switch

Code

Power Supply

1

220V AC

2

24V DC

Code

Temperature Type

H

High Temperature Type

S

Common Type

Code

Fork Sort

A

Standard Type

C

Shock Rod Type

S

Compact Type

Code

Fork Type and Insertion Depth Range

G1

Small Fork 45mm~3000mm

G2

Standard Fork 100mm~3000mm

Code

Process Connection/Material

N1

1″ NPT thread/316ss

G1

G1″ thread/316ss

D25

DN25 PN4.0MPa/316ss

D40

DN40 PN4.0MPa/316ss

D50

DN50 PN4.0MPa/316ss

TC1

1″ Clamp/316ss

TC2

2″ Clamp/316ss

Code

Shell/Cable Interface Size

A1

Die-cast Aluminum Shell Explosion-proof IP65/NPT 3/4″

A2

316ss Shell Explosion-proof IP67/M20X1.5

Customers Supply

Insertion Length