Mumbai, Maharashtra, India
Our Products
Level transmitter works on the principle of reed resistance/permanent magnet basis. Reedswitches function like the center arm (as shown in fig. 1) of a potentiometer. As per liquid level float moves up or down, magnet inside the float operates the reedswitches thereby causing a change in resistance value. Change in the resistance is measured by the electronics unit and conditioned as a current output of 4 to 20 mA. Signal conditioner is head mounted and of 2-wire loop powered suitable for 12 to 24 VDC giving output of 4 to 20 mA.
Model (VMT-04-F65-AW) , (VMT-04-F92-AW)top mounted magnetic reed/resistance cascade type loop powered 2 wire level transmitter. Process Connection flange 78 or 120 mm diameter with 4 bolt holes of 6mm or 14 mm dia on 65 or 92 mm PCD respectively. Wetted parts flange & float stopper in SS 304. Float material SS 316L and diameter 41, 53 or 68 mm. Operating pressure 10kg/sq.cm and Temperature 125 deg.C. maximum.
A capacitance is formed between the probe and the vessel wall .As the level of the measuring medium rises or falls capacitance between the probe and vessel wall changes proportionately. A high frequency sine wave is applied between the probe and tank wall. A change of medium level will induce a change in the current of the applied sine wave. From when the capacitance in the vessel increase, impedance will decrease and current will increase and vice-versa. (Z=Resistance, C=Capacitance, F= Frequency)
Head mounted electronics converts the capacitance variation to 4-20mA signal for long distance transmission. It is provided with trimpots for SPAN and ZERO adjustments. With no moving parts it is free from wear and tear, rugged and robust in construction. No dead zone like float based instruments.
It must be ensured that the probe is parallel to the tank wall throughout it's length.
Capacitance type 3 wire Level transmitter Model (CLT-1) with non insulated probes for non-conductive liquids or PTFE Teflon insulated probes for conductive liquids.
| FREQUECY OF OPERATION | 5 to15kHz. |
|---|---|
| PROBE MATERIAL | Stainless Steel / Teflon insulated 10/12/16 mm rod upto Max 3 Metre length |
| PROCESS CONNECTION | 3/4",1",1.1/2" BSP(M) or 1 "ASA 150 lbs flanged but thickness 12mm (or as per customer specification) |
| POWER SUPPLY | 24VDC |
| OUTPUT | 4 to 20 mA.(non-isolated) |
| SPAN & ZERO ADJUSTMENT | Trim pots |
| MAX.WORKING PRESSURE | 10kg/sq.cm |
| MAX.WORKING TEMP. | 150deg.C |
| ACCURACY | ±0.5%, ±1% or ±2% |
| ENCLOSURE | Cast aluminium weather proof with PG9 cable gland or Flame proof (IS2148-2004,Gr II A and B gases) |
| CABLE SIZE | 3 core, 0.75 sq.mm screened PVC cable. |
