The SHT 5001 is a water detector designed for permanent installation in a small distribution board or fuse box. It features two alarm lines, each connected to its own alarm relay, with two inputs for passive water sensors or mini float switches. When an alarm is triggered, the red sensor LED lights up (input 1) or flashes (input 2), an internal piezo buzzer sounds (which can be permanently deactivated), the assigned relay activates, and an alarm output (12 V/max. 30 mA) for connecting an external piezo driver or LED is enabled. An alarm memory can be set individually for each alarm line using a jumper. The alarm can be acknowledged internally by pressing the RESET button or externally by closing a potential-free contact. The TEST button allows for checking the alarm settings by simulating "water" on both alarm lines. The connected sensors and mini float switches are not tested during this process. The SHT 5001 operates on mains voltage from the public power grid and/or 12/24 V DC from external batteries or accumulators.

Water sensor or mini float switch? This question is quite simple to answer: If it is at all possible to use a mini float switch for the intended purpose, you should do so. This is because you are dealing with a water level, a gauge, or a lift. While sensors will function for a time, their bare contacts are completely unsuitable for constantly damp environments. Keep in mind that water sensors are wear parts. The more often and longer they are exposed to water, the faster they age and, at best, tend to cause increased false alarms.