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Vibrating Rod Level Switch
The Sapcon Vibrating Rod level switch "Vibrosonde" (SLP Series) is a tuning based switch for single point control. The instrument has an adjustable switching delay for covered and uncovered conditions. The electronics is integral with the fork and can be mounted in different ways such as wall/back panel mounting or remote mounting. If the use is in hazardous area, you could choose the flame proof version. You also have the flexibility of choosing the insertion length.
The Vibrosonde (SLP... Series) is single cylindrical vibrating rod with no adjustment, no moving parts, no affected by moisture contents and electrical properties of process material.
Applications
High and Low level limit control of free flowing powders and granules such as cement, flour, detergent, plastic granules.
Where is it used
Vibrosonde (SLP… series) level switches are successfully used in processing plants for High and Low level limit control of free flowing powders and granules such as cement, flour, detergent, plastic granules.
Principle
A specially shaped tuning rod is kept vibrating by piezo-electric elements. The frequency of the fork changes when the tines are immersed in the liquid. The change in the frequency is detected and used for switching a relay. The output contacts of the relay can in turn be used for annunciation or control.
Evaluation Unit
| Housing | Cast aluminum, weather-proof stoving enamel painted, suitable for back panel/wall |
| Cable Entry | 3 No. / 2 No. |
| Mains | 110 or 230 V AC (-15% to +10% ) 50 Hz ; 240 V AC/DC; 90 to 260 V AC universal power supply. |
| Relay Output | One/two set (s) of potential free change over contacts rated at 6A 230V AC, 50Hz for non-inductive load. |
| Time Delay | Adjustable from 1 to 20 second for probe covered & uncovered condition. |
| Indication | Red LED for alarm and Green LED for normal condition. |
| Power Consumption | 5 VA approx. |
| Response Time | 1 second. approx. |
| Operating Temp. | -20ºC to +60ºC |
| Fail-Safe Mode | High or Low field selectable. |
Probe
| Tuning Fork | Stainless steel 316 |
| Mounting | 1" or 1½" BSP screwed (flanged mounting on request). 1½" BSP for high temperature version. |
| Extension | Stainless steel pipe. |
| Probe Length | Min. 128 mm, max. 3500 mm. |
| Operating | -20º C to + 80º C. |
| Temperature | Standard models (high temp. models up to 200º C are also available.) |
| Viscosity | Up to 10000 cP. |
| Density | Greater than 0.7gm/cc. |
