The manufacturer adds that installation is very simple: loosen the two screws of the sensor, put on the protective cover and fasten the screws, and the sensor is then protected from external damage. After all, impact destruction is always possible, even with careful handling or during unattended pump operation.
Tsurumi says the sensor on its pumps, such as the KTVE and KTZE series, already comes with some protections in place. The company says its flexible rubber bend absorbs shocks quite effectively - but only to a certain extent.
In order to guarantee protection even in the event of violent impact, Tsurumi has developed a conical ram protection cover made of solid sheet steel. This practically rules out mechanical damage to the sensor, according to the manufacturer.
Sensor pumps are popular, according to Tsurumi, because they allow the device to control itself: if the water rises to a certain level, the unit starts up - and switches off again when the level drops. It adds that this also saves operating costs, and the ram protection safeguards this function.
Tsurumi says that, unlike other suppliers, it relies on electrodes to measure the water level. This approach is potentially much more fail-safe because it does not require mechanics. Electrodes also react faster and are usually more accurate.
“Of course, every measuring instrument is vulnerable,” states Tsurumi. “In this respect, the recommendation to pump operators is to install the low-cost ram protection.”
The manufacturer has not yet stated whether this cover will become standard for new pumps.