MODEL VHS
Vibrating Element “Rod” Point Level Sensor
Changing Contents, Low Density Materials – No Problem!
Ideal level sensor technology for powders and granular material. No calibration required, universal AC/DC power supply and proven solidstate technology.
Vibrating element “Rod” point level sensor using piezoelectric crystal technology is a solidstate device for high, low and intermediate level detection of a wide range of bulk solids. These units are a great replacement for RF Admittance / Capacitance type sensors in applications where material dielectric changes or vessel content changes exist because there is no calibration required. They are a great fit for sensing lightweight materials, as low as 3.12 pounds per cubic foot.
Rugged “Rod” design, sheds material
LED indicates Normal / Alarm status
Universal AC/DC power supply
No calibration required
Solidstate design, no moving parts
Twist off cover
Selectable High/Low fail-safe output
Removable wiring terminals
Dual conduit entrances
Rotatable housing simplifies conduit alignment
MODEL VHS
Vibrating Element “Rod” Point Level Sensor
Changing Contents, Low Density Materials – No Problem!
Ideal level sensor technology for powders and granular material. No calibration required, universal AC/DC power supply and proven solidstate technology.
Vibrating element “Rod” point level sensor using piezoelectric crystal technology is a solidstate device for high, low and intermediate level detection of a wide range of bulk solids. These units are a great replacement for RF Admittance / Capacitance type sensors in applications where material dielectric changes or vessel content changes exist because there is no calibration required. They are a great fit for sensing lightweight materials, as low as 3.12 pounds per cubic foot.
Rugged “Rod” design, sheds material
LED indicates Normal / Alarm status
Universal AC/DC power supply
No calibration required
Solidstate design, no moving parts
Twist off cover
Selectable High/Low fail-safe output
Removable wiring terminals
Dual conduit entrances
Rotatable housing simplifies conduit alignment
Principal of Operation
Model VHS sensors use a mechanical resonance system. The mechanical element is excited and kept in resonance by the sensor’s electronic circuitry. An electrical signal is applied to a piezoelectric crystal. This electrical excitation causes physical deformation of the crystal, which in-turn creates the probe element vibration at its natural resonant frequency. When no material is present around the probe, the vibration exists. With material present and surrounding the probe element, the vibration is dampened and detected by the electronic circuitry. This results in a change in the relay output and local LED indication.
Application and Use
Model VHS vibrating element point level sensors are used to detect the presence and absence of powders and granular bulk solid materials in bins, hoppers and silos. Best performance and use can be found with dry and free-flowing materials. The Model VHS is great for use in detecting lightweight materials with density as low as 3.12 lbs/ft³ (0.05 kg/dm³). Model VHS vibrating element sensors are also ideal for vessels with changing contents as the sensors do not require calibration, unlike RF capacitance or admittance sensors. Industries where successful applications can be found include Plastic Processing, Chemical, Agriculture, Food, Pulp & Paper, Recycling, Power, Mining/Quarry and Construction.
Technical Data
| Power Supply | Universal 20-255VAC/DC |
| Sensitivity | Selectable, minimum density is 3.12lbs/ft³ (0.05kg/dm³ or 50kg/m³) |
| Time Delay | Selectable – When Covered: <1.8 sec or 5 ± 1.5 s – When Uncovered: < 2 sec or 5 ± 1.5 s |
| Fail-Safe | Selectable – High or Low |
| Housing | Die-cast aluminum, FDA compliant powder coat, NEMA Type 4X, IP65 |
| Process Connection | 1-1/2″ NPT stainless steel |
| Probe Materials | 316Ti stainless steel |
| Process Temp | Standard Probe -22° F to +230° F (-30° C to +110° C) High Temp Rod -22° F to +320° F (-30° C to +160° C) |
| Certifications | CE mark |
More Information
Click here to download product line PDF’s
Standard Models Available
- Standard probe 8.15″ (207mm) insertion length
- Pipe Extended probe from 20″ (508mm) to 118″ (3m)
- Split-Architecture (remote electronics)
- Cable Extended probe from 39″ (1m) up to 65’ (20m)
- Ordinary locations
Principal of Operation
Model VHS sensors use a mechanical resonance system. The mechanical element is excited and kept in resonance by the sensor’s electronic circuitry. An electrical signal is applied to a piezoelectric crystal. This electrical excitation causes physical deformation of the crystal, which in-turn creates the probe element vibration at its natural resonant frequency. When no material is present around the probe, the vibration exists. With material present and surrounding the probe element, the vibration is dampened and detected by the electronic circuitry. This results in a change in the relay output and local LED indication.
Application and Use
Model VHS vibrating element point level sensors are used to detect the presence and absence of powders and granular bulk solid materials in bins, hoppers and silos. Best performance and use can be found with dry and free-flowing materials. The Model VHS is great for use in detecting lightweight materials with density as low as 3.12 lbs/ft³ (0.05 kg/dm³). Model VHS vibrating element sensors are also ideal for vessels with changing contents as the sensors do not require calibration, unlike RF capacitance or admittance sensors. Industries where successful applications can be found include Plastic Processing, Chemical, Agriculture, Food, Pulp & Paper, Recycling, Power, Mining/Quarry and Construction.
Technical Data
| Power Supply | Universal 20-255VAC/DC |
| Sensitivity | Selectable, minimum density is 3.12lbs/ft³ (0.05kg/dm³ or 50kg/m³) |
| Time Delay | Selectable – When Covered: <1.8 sec or 5 ± 1.5 s – When Uncovered: < 2 sec or 5 ± 1.5 s |
| Fail-Safe | Selectable – High or Low |
| Housing | Die-cast aluminum, FDA compliant powder coat, NEMA Type 4X, IP65 |
| Process Connection | 1-1/2″ NPT stainless steel |
| Probe Materials | 316Ti stainless steel |
| Process Temp | Standard Probe -22° F to +230° F (-30° C to +110° C) High Temp Rod -22° F to +320° F (-30° C to +160° C) |
| Certifications | CE mark |
More Information
Click here to download product line PDF’s
Standard Models Available
- Standard probe 8.15″ (207mm) insertion length
- Pipe Extended probe from 20″ (508mm) to 118″ (3m)
- Split-Architecture (remote electronics)
- Cable Extended probe from 39″ (1m) up to 65’ (20m)
- Ordinary locations
Ordering Information
Sensor Final Assembly Part Number Structure
Ordering Information
Sensor Final Assembly Part Number Structure
1 – Standard Rod
2 – High Temp Rod
1 – Standard Length
2 – Pipe Extended
3 – Cable Extended
4 – Split-Architecture
1 – SPDT Relay
1 – Ordinary Location (CE Mark)
1 – 1-1/2″ NPT
1 – Standard Rod
2 – High Temp Rod
1 – Standard Length
2 – Pipe Extended
3 – Cable Extended
4 – Split-Architecture
1 – SPDT Relay
1 – Ordinary Location (CE Mark)
1 – 1-1/2″ NPT