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Vibrating point level switch

Vibrating point level switch
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Vibrating point level switch

Product catalog summary
Working Principle
The FineTek tuning fork level switch functions by detecting changes in vibration frequency when the fork comes into contact with a material. It utilizes piezoelectric crystals to generate vibrations, with one element transmitting and the other receiving signals, which are then converted into electrical output. This switch is particularly suitable for materials with low dielectric constants, low viscosity liquids, and mixed materials in containers.

Features
- Reliable and maintenance-free for bulk solids.
- Easy to mount and calibrate.
- Capable of withstanding lateral loads and static electricity.
- Equipped with a fail-safe feature to prevent malfunctions due to power shortages.
- Dual insulation protects the PCB from temperature and humidity.
- Operates over a wide voltage supply range (20~250 Vac/Vdc).
- Offers SPDT Relay and SSR MOSFET outputs.
- No calibration required, with a durable design.
- Sensitivity can be adjusted for different media densities.

Applications
This switch is ideal for detecting levels in bins, silos, and hoppers containing powdered materials such as powdered milk, coffee beans, and flour. It is also applicable for sludge level detection in wastewater and various liquids, including petroleum and corrosive liquids.

Specifications
- Supply voltage: 20~250 Vac/Vdc.
- Fork length: 100mm.
- Operating temperature range: -40 to +150°C.
- Maximum pressure: 40 Bar.
- Housing material options: SUS304, SUS316, SUS316L.
- IP protection rating: IP67.
- Sensitivity: Adjustable for different material densities.

Installation and Wiring
The tuning fork should be installed vertically with wiring ports facing downward. It supports both AC/DC power supply and PNP/NPN output configurations. Detailed wiring diagrams are provided for connecting the device in various modes.

Fail-Safe and Sensitivity Adjustment
The device includes fail-safe high and low protection modes. Sensitivity can be adjusted using a screwdriver, which affects the switching point position. The default setting is at maximum sensitivity.

Testing and Indication
Magnetic testing can be used to verify the switch's function, with red LED indicators showing the vibration status. The device's output status changes based on the presence of material, as indicated by the LED.
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Catalog excerpts

Vibrating point level switch-1

Tuning Fork Level Switch

 Open the catalog to page 1
Vibrating point level switch-2

PRODUCT INTRODUCTION WORKING PRINCIPLE The FineTek tuning fork level switch is suitable level control switch for liquids, sludges, petroleums as well solid level detection of almost any granular, sandy, chip like, powdery, low bulk density materials. 1 Most materials in powder can be measurable, includes the grounded coffee, milk power, chocolate, coal ash, bulk, sugar, salt, wheat, grains, glass debris, plastic pellet, cement 1 Sludge level detection in waste water The working principle is based on the changes of vibration frequency of the tuning fork when it comes into contact with a liquid...

 Open the catalog to page 2
Vibrating point level switch-3

Dimensions (Unit:mm) Extension Type Supply voltage & output Standard Type Standard Type Extension Type Extension Type SC2400/2410 【Cable Wire Type】 SC240 99:20~250Vac / Vdc 2 wire Contactless electronic switch. SC24199:12~55 Vdc 3 wire PNP/ NPN Output. Fork length Operating temp. in ambient air Storage temp. Operating temp. in bin Operation humidity Operation pressure Min. material density sensed Magnetic testing Output function test performed by putting magnets near the indicated spot Vibrating frequency 350~370Hz Green light:indicate power supply Red light:indicate operating mode Status indication...

 Open the catalog to page 3
Vibrating point level switch-4

MINI TUNING FORK LEVEL SWITH Dimensions (Unit:mm) Extension Type Standard Type Extension Type Standard Type Extension Type SC2800/2810 【Cable Wire Type】 SC2809:20~250,50/60Hz Vac/Vdc 2 wire Contactless electronic switch. SC2819:12~55 Vdc 3 wire PNP/ NPN Output Fork length Operating temp. in ambient air Storage temp. Operating temp. in bin Operation humidity Operation pressure Min. material density sensed Magnetic testing Output function test performed by putting magnets near the indicated spot Vibrating frequency 1 KHzK10% Green light:indicate power supply Red light:indicate operating mode Status...

 Open the catalog to page 4
Vibrating point level switch-5

Model No. Level sensor housing Probe construction SC1410【Tuning Fork Ultra Extension Type】 Aluminum / IP65 SUS 304 / 316 / 316L Conduit Max. vertical load on rod. Operating pressure. Power supply SC1420【Tuning Fork Extension Type】 Power consumption Operating temp. in ambient air Signal output Min. material density sensed Time delay Relay, SPDT, 5A/250Vac/ 28Vdc, 1 set or 2 set SSR(MOSFET) 400mA/60 Vac/ Vdc, 1 set or 2 set Solid:³0.07g/cm3, Liquid: ³0.7g/cm3 0.6 Second / Operate; 1~3 Seconds / Reset Vibrating frequency. Selectable Fail-safe Selectable sensitivity

 Open the catalog to page 5
Vibrating point level switch-6

Model No. Level sensor housing Probe construction Mounting Conduit Max. vertical load on rod. Operating pressure. SC1540 【Corrosion Proof Type】 316L Coating TEFLON Flange 1"(min.) Power supply Power Consumption Operating temp. in ambient air Signal output Min. material density sensed Time delay Vibrating frequency. Selectable Fail-safe Selectable sensitivity Relay, SPDT, 5A/250Vac/ 28Vdc, 1 set or 2 set SSR(MOSFET) 400mA/60 Vac/ Vdc, 1 set or 2 set Solid: ³0.07g/cm3, Liquid: ³0.7g/cm3 0.6 Second / Operate; 1~3 Seconds / Reset 350~370Hz Hi./ Lo. Hi./ Lo.

 Open the catalog to page 6
Vibrating point level switch-7

NEPSI PROOF No.GYJ111212 Ex d IIC T3~T6 PTB PROOF No. 09 ATEX 1058 II 2G Ex d IIB T4 Gb II 2D Ex tb IIIC T80BC ~ T130BC Db IP65 Dimensions (Unit:mm) Model No. Level sensor housing Probe construction Mounting Conduit Max. vertical load on rod. Operating pressure. SC1741【Tuning Fork Ultra Extension Type】 Power supply Power consumption Operating temp. in ambient air Operating temp. in bin Signal output Min. material density sensed Time delay Vibrating frequency. Selectable Fail-safe Selectable sensitivity -40LC~60LC -40LC~130LC Relay, SPDT, 3A/250Vac/ 28Vdc, 1 set or 2 set SSR(MOSFET) 400mA/60 Vac/...

 Open the catalog to page 7
Vibrating point level switch-8

TERMINAL / SENSITIVITY ADJUSTMENT (SPDT TYPE) SC1400X, SC1410X, SC1420X, SC1540X,SC1600X, SC1740X, SC1741X Relay Output SSR(MOSFET) Output PWR: Power Supply (Green Light) SIGNAL: Output Indication (Red Light) FSH: Power On. The signal lamp is on and the relay is conductive. While the tuning fork switch senses the material, the signal lamp is off and relay is not conductive. FSL: Power On. The signal lamp is off and the relay is not conductive. While the tuning fork switch senses the material, the signal lamp is on and relay is conductive. SENSITIVITY L: Low Sensitivity SENSITIVITY H: High Sensitivity...

 Open the catalog to page 8
Vibrating point level switch-9

WIRING DIAGRAM DETAILS Brown Black Wiring Power can be AC/DC switching. Two wires are connected with terminals (L+/N-) as in Figure 1. Yellow Green Low (Min.) Mode: Pin 1 (Brown) is connected to N-. Pin 2 (Black) is connected to L+ with relay. Pin 4 (Yellow Green) connects to tank ground. Yellow Green High (Max.) mode: Pin 1 (Brown) is connected to N-. Pin 3 is connected to pin 2 (Black) to L+ with Relay . Pin 4 (Yellow Green) connects to tank ground. Figure 1 Two wires wiring Min. Yellow Green Brown Black Blue Brown Yellow Green Black Blue Brown Yellow Green Yellow Yellow Green Green Brown 1...

 Open the catalog to page 9
Vibrating point level switch-10

TUNING AND INDICATION DETAILS FORK TRIGGER POINT MAGNETIC TEST SC2409 fork trigger point is shown as Figure 3 3 below. The testing medium is water(S.G.=1 g/cm ), and its trigger point is about 23mm from the fork tip. If testing medium with S.G (specific gravity) lower than 3 1g/cm (water), the trigger point would increase. Similarly, the trigger point will downward while the S.G is large than water. After the switch has installed and power tested, magnetic switch can be performed accordingly. Output status will switch from status of NO. to NC. or NC to NO. and red LED would indicate the vibration...

 Open the catalog to page 10
Vibrating point level switch-11

INSTALLATION FOR TUNING FORK Horizontal Installation: 1. Can be applied for high viscosity fluid and power Do not install near around material inlet. 2. Wiring port faces downward recommended. 3.Consistence of the wiring port direction and always in downward direction for multi-tuning fork installation. 3.Consistence of the wiring port direction for multituning fork installation 3. Do not install near material inlet. Vertical Installation: 1. Depends on the sensitivity tuning, user should note the switching point is triggered around 15mm from the tip of fork.

 Open the catalog to page 11
Vibrating point level switch-12

ORDER INFORMATION 1400: Tuning Fork Standard Type 1410: Tuning Fork Ultra Extension Type 1420: Tuning Fork Extension Type 1540: Tuning Fork Corrosion Proof Type 1600: Tuning Fork Sanitary Type 1740: Explosion Proof Tuning Fork Standard Type 1741: Explosion Proof Tuning Fork Ultra Extension Type POWER & OUTPUT MODULE-' MATERIAL (Wetted Part)- & The Probe Length of SC3800 is Fixed. 1. Please affirm the voltage. 2. Please affirm the mounting positions. 3. Please affirm the material specific gravity (S.G.) value. 4. Please affirm whether any bridge block or vibrating motor are attached onto the silo...

 Open the catalog to page 12

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