MODEL VHL

Vibrating Fork Point Level Sensor for Liquids

The Model VHL is a vibrating fork level detection sensor with a relay output, ideal for high, low and intermediate level detection and control of a wide range of liquid and slurry material.  This device uses piezoelectric and solidstate electronics technologies, offering a universal AC/DC power supply, a SPDT relay output and a variety of probe lengths.  The Model VHL is a liquid level sensor that is economical and very reliable.

  • Polished vibrating fork is standard

  • PFA coated or hygienic extreme-polished fork available

  • Unaffected by dielectric constant, conductivity, viscosity, pressure and temperature

  • Relay output in compact enclosure

  • High process temperature of 266°F (130°C)

  • Short, standard, long and extended probe lengths

  • IP67 (NEMA 6) rated enclosure

MODEL VHL

Vibrating Fork Point Level Sensor for Liquids

The Model VHL is a vibrating fork level detection sensor with a relay output, ideal for high, low and intermediate level detection and control of a wide range of liquid and slurry material.  This device uses piezoelectric and solidstate electronics technologies, offering a universal AC/DC power supply, a SPDT relay output and a variety of probe lengths.  The Model VHL is a liquid level sensor that is economical and very reliable.

  • Polished vibrating fork is standard

  • PFA coated or hygienic extreme-polished fork available

  • Unaffected by dielectric constant, conductivity, viscosity, pressure and temperature

  • Relay output in compact enclosure

  • High process temperature of 266°F (130°C)

  • Short, standard, long and extended probe lengths

  • IP67 (NEMA 6) rated enclosure

Principal of Operation

Model VHL vibrating fork level switches are suitable for level detection of a wide range of liquids. The operation principle is based on an electronic circuit exciting piezoelectric crystals, thereby making the fork probe vibrate. As the fluid or medium reaches and covers the fork its vibration changes, or stops completely. The fork will start vibrating again as the fluid sets it free. The electronics sense the change of vibration and causes the relay contacts to change state.

Application and Use

Mounted on pipes or tanks the filling and emptying of vessels can be controlled using the Model VHL as they can generate fail-safe alarms (on power failure) providing overfill or dry run protection where switching of high current loads is required (refer to technical specifications for relay).

Technical Data

Power Supply 20-255VAC, 50/60Hz;
20-60VDC
Consumption AC: 1.2-17VA
DC: <3W
Enclosure Protection IP67 (NEMA Type 6)
Process Density ≥ 0.7 S.G. (0.7 g/cm³)
Maximum Pressure 588 psi (40 bar)
Maximum Viscosity 10,000 cSt (mm2/s)
Medium Temperature -40°F to +266°F
(-40°C to +130°C)
Ambient Temperature -22°F to +158°F
(-30°C to +70°C)
Local Indication Bi-Color LED
Alarm – Red. Normal – Green
Output SPDT Relay, 8A @ 250VAC
Probe Material 316Ti Stainless Steel
(DIN 1.4571)
Housing Material PBT Fiber-Reinforced, Flame Retardant, Painted
Certifications CE mark

More Information

Click here to download product line PDF’s

Model VHL Sales Flyer

Standard Sensor Model Includes

  • Short Probe (2.7″/69mm long)
  • Standard Probe (4.9″/125mm long)
  • Long Probe (7.9″/200mm long)
  • Extended Probe (12″-118″/300mm-3,000mm)
  • Ordinary Locations

Principal of Operation

Model VHL vibrating fork level switches are suitable for level detection of a wide range of liquids. The operation principle is based on an electronic circuit exciting piezoelectric crystals, thereby making the fork probe vibrate. As the fluid or medium reaches and covers the fork its vibration changes, or stops completely. The fork will start vibrating again as the fluid sets it free. The electronics sense the change of vibration and causes the relay contacts to change state.

Application and Use

Mounted on pipes or tanks the filling and emptying of vessels can be controlled using the Model VHL as they can generate fail-safe alarms (on power failure) providing overfill or dry run protection where switching of high current loads is required (refer to technical specifications for relay).

Technical Data

Power Supply 20-255VAC, 50/60Hz;
20-60VDC
Consumption AC: 1.2-17VA
DC: <3W
Enclosure Protection IP67 (NEMA Type 6)
Process Density ≥ 0.7 S.G. (0.7 g/cm³)
Maximum Pressure 588 psi (40 bar)
Maximum Viscosity 10,000 cSt (mm2/s)
Medium Temperature -40°F to +266°F
(-40°C to +130°C)
Ambient Temperature -22°F to +158°F
(-30°C to +70°C)
Local Indication Bi-Color LED
Alarm – Red. Normal – Green
Output SPDT Relay, 8A @ 250VAC
Probe Material 316Ti Stainless Steel
(DIN 1.4571)
Housing Material PBT Fiber-Reinforced, Flame Retardant, Painted
Certifications CE mark

More Information

Click here to download product line PDF’s

Model VHL Sales Flyer

Standard Sensor Model Includes

  • Short Probe (2.7″/69mm long)
  • Standard Probe (4.9″/125mm long)
  • Long Probe (7.9″/200mm long)
  • Extended Probe (12″-118″/300mm-3,000mm)
  • Ordinary Locations

Ordering Information

Sensor Final Assembly Part Number Structure

Ordering Information

Sensor Final Assembly Part Number Structure

Probe Length

1 – 2.7″ (69mm)
2 – 4.9″ (125mm)
3 – 7.9″ (200mm)
4 – Extended (12″ – 118″)

Process Connection

1 – 1″ NPT

Probe Length

1 – 2.7″ (69mm)
2 – 4.9″ (125mm)
3 – 7.9″ (200mm)
4 – Extended (12″ – 118″)

Process Connection

1 – 1″ NPT

Get a Quote or Call Now to Order! 330-523-5215

Get a Quote or Call Now to Order!
330-523-5215