SC38 Multi-Functional Tuning Fork Level Switch

SC Series Vibrating Level Sensors

The SC series comprises vibrating level sensors with tuning fork probes that utilize piezoelectric crystals and semiconductor electronics to generate vibrations in the tuning fork element at a specific frequency and to receive electronic feedback. When the probe element comes into contact with the target material, the vibrations are dampened, altering the electronic feedback. This change is detected by the electronics, which switch the sensor's output state to indicate the presence of the material. When the probe no longer contacts the target material, the vibrations resume, and the output state reverts to indicating the absence of material.

Key Features:

• Double insulation reduces PCB damage caused by significant temperature fluctuations.
• Suitable for liquid, bulk, and solid material applications.
• Sensitivity adjustment available for different material densities, including fine powder detection.
• Minimal calibration required, user-friendly, with a robust and durable design.
• SPDT relay output and SSR MOSFET output options.
• Wide operating voltage range: 20–250 V AC/DC, 50/60 Hz.

Applications:

The device is designed to detect maximum and minimum levels in tanks or pipes containing various solid or liquid materials. Examples of detectable substances include:

• Bulk Materials:
  • Milk powder
  • Sugar
  • Tea
  • Salt
  • Gravel
• Liquids:
  • Water
  • General-purpose solvent
  • Heavy oil
  • Crude oil
  • Ink

Industries:

• Chemical fiber industry
• Cement industry
• Steel industry
• Food industry
• Pharmaceutical industry

Technical Specifications:

Dimensions [mm]	SC380 Standard	SC381 Extended	SC382 Highly Extended
Output Type	8/16mA	3-wire (NPN/PNP)	Two-relay
Operating Voltage	11-36V DC	10-55V DC	19-253V AC/DC, 50/60Hz
Power Consumption	<600mW	<830mW	Max 1.3W
Input Protection	Reverse polarity protection		None
Surge Protection	Overvoltage Category III		1A/230V AC
Measurement Error	Max ±1mm
Repeatability	0.5mm
Hysteresis Range	Approx. 2mm
Ambient Temperature	-40…+85°C (Ex-proof Type: -40…+70°C)	-40…+85°C (Refer to user manual)
Process Temperature	-40°C…+150°C
Suitable Liquid Density	≥0.5g/cm³ or ≥0.7g/cm³
Liquid Viscosity	Max: 10000mm²/s (10000cSt)
Max Particle Size in Liquid	Max: Ø5mm
External Cable Diameter	Ø6-10mm
Process Pressure	Max: 40 bar
Output Signal	Ex-proof Signal 8/16mA	Transistor Output (NPN/PNP)	2 SPDT Relay Outputs
Contact Capacity	-	350mA, 55V DC	6A / 250V AC, 6A / 28V DC
Ingress Protection	IP66/67
Probe Material	SUS 304 / 316 / 316L
Ex-proof Parameters	Ui(V)=36V, Ii=100mA, Pi=1W, Ci(nF)=0, Li(μH)=0※	-	-

High-Temperature Models:

Dimensions [mm]	SC380 High-Temperature	SC381 High-Temperature Extended	SC382 High-Temperature Highly Extended
Output Type	8/16mA	3-wire (NPN/PNP)	Two-relay
Operating Voltage	11-36V DC	10-55V DC	19-253V AC/DC, 50/60Hz
Power Consumption	<600mW	<830mW	Max 1.3W
Input Protection	Reverse polarity protection		None
Surge Protection	Overvoltage Category III
Measurement Error	Max ±1mm
Repeatability	0.5mm
Hysteresis Range	Approx. 2mm
Ambient Temperature	-40…+85°C (Refer to user manual)
Process Temperature	-40°C…+150°C
Suitable Liquid Density	≥0.5g/cm³ or ≥0.7g/cm³
Liquid Viscosity	Max: 10000mm²/s (10000cSt)
Max Particle Size in Liquid	Max: Ø5mm
External Cable Diameter	Ø6-10mm
Process Pressure	Max: 40 bar
Output Signal	Ex-proof Signal 8/16mA	Transistor Output (NPN/PNP)	2 SPDT Relay Outputs
Contact Capacity	-	350mA, 55V DC	6A / 250V AC, 6A / 28V DC
Ingress Protection	IP66/67
Probe Material	SUS 304 / 316 / 316L
Ex-proof Parameters	Ui(V)=36V, Ii=100mA, Pi=1W, Ci(nF)=0, Li(μH)=0※	-	-