In the event of a power failure, the functionality of sensitive infrastructure such as data centers, server rooms, hospitals, telecommunications and other production facilities is ensured by an emergency power system.
Typically, diesel emergency power generators with a UPS battery system are used in this context. But who ensures that the backup power supply runs smoothly? Here is where SGB’s leak detection technology comes in: It makes an essential contribution to the safe functionality of double-walled tanks and double-walled pipes as well as collecting chambers, shafts, sumps, or drip pans.
Leak detectors by SGB work with a pneumatic mode of operation: either with overpressure or under pressure i.e. vacuum. A prerequisite for using this method is that the monitored tank or pipe is double-walled. This is how it works for vacuum leak detectors: The pump in the leak detector creates an operational under pressure in the interstitial space. Any minor unavoidable leakage is compensated by the system automatically.
In case of an air leak in the outer or inner wall above the liquid level, the vacuum pump switches on in order to re-establish the operating pressure. If the airflow leaking into the interstitial space exceeds the limited feed flow of the pump, the pump remains on continuously. Increasing leak rates lead to a further increase in pressure until the switching value for “alarm on” has been reached. The optical and audible alarm will then be activated.
In case of a liquid leak, liquid enters the interstitial space and collects at its lowest point. This incoming liquid leads to the vacuum dropping, the pump is switched on and evacuates the interstitial space until the operating pressure has been reached again. This process is repeated until the liquid stop valve in the suction line closes.
Due to the vacuum still present in the measuring line, further leak liquid is sucked into the interstitial space, the measuring pipe and a pressure-compensating vessel if appropriate. This leads to a reduction of the vacuum until the pressure has reached the “alarm on” level. The optical and audible alarm signal is triggered.
Pneumatic mode
With this pneumatic mode of operation, there will be no product loss,
no risk to people and the environment and good time for measures in the case of a leak.
For the leak monitoring of collecting chambers, sumps, shafts and other drip pans, SGB provides the LS 50 leakage sensor. It emits an alarm as soon as the sensor comes into contact with liquid. It can be used in applications with heating oil, water or other non-explosive liquids. The LS 50 device consists of an indicating unit on the one hand and sensors on the other. The indicating unit is available in two versions:
a) Type “wall-mounting” with an optical and acoustical alarm signal as well as a potential-free relay contact for alarm forwarding. Two sensors can be connected.
b) Type “top-hat rail mounting” with an optical alarm display and a potential-free relay output for alarm forwarding. One sensor can be connected.
The SGB product range includes sensors with different technical specifications, designed for use in a variety of applications:
Capacitive fleece sensor (KVS) => activation height < 1="" />
Conductivity sensor (LS) => activation height < 3="" />
Capacitive sensor (KS) => activation height < 5="" />
Float switch (FS) => activation height approx. 3 cm
For information on all leak prevention solutions, go to SGB’s online shop at shop.sgb.de/en.
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