WEKA Tank Level Instruments (TLI)
- Customer pickup,
- Courier
- In detail
The differences between voltage (XM) and current (XT) output is as follows:
XM works on the principle of voltage divider. The voltage output is proportional to the liquid level.
XT operates same as XM but additionally use an integrated 4 - 20mA signal converter.
Operating Principle
The level sensing unit is vertically mounted in the tank and cable-connected to a remote receiver. A voltage divider extends over the full distance within the sealed transmitter stem, with magnetic reed switches tapped in at regular intervals. As the float moves with liquid level, it magnetically closes a series of reed switches in sequence, thus varying the tapped-off portion of the divider voltage.
Voltage Divider Ensures Consistent Accuracy
The WEKA voltage divider uses a cascade series of reed switches and resistors tapped in a 2-3-2 sequence producing a voltage signal. This signal is directly proportional to the liquid level and assures highest accuracy. For each float travel the distance between reeds will be shown as voltage difference by the output device. Inaccuracies are limited to this distance and tolerances of the output device.
Float Technology
Advantage 1
TLI takes advantage of the proven highly reliable float technology that provides extremely accurate liquid level sensing under almost all operating conditions. Floats follow the true liquid surface, rather than extrapolate results from indirect indications such as pressure saving or echo location. They operate flawlessly in tanks with curved walls or other shapes without clear vertical access, where other liquid level technologies may be unable to function.
Advantage 2
Floats feature the unique capability to monitor liquid interface levels in virtually any tank size or shape. Any two liquids with differing densities
(> 0.1g/cm3) are contained together (ex. oil and water), GEMS float type sensors keep operators aware of their interface level position.