Your watchful eye on pumps, meters & switches!

Hey! Lena is your contact and counting sensor for everything that switches, counts or needs to raise an alarm. Whether it's a pump, water meter, float or pressure switch, Lena tells you right away what's going on and counts reliably.

Two functions, one sensor

Lena does both: contact alarm – you get an instant message on every contact (open/closed) – and counting function – it counts contact closures over a time interval and reports the count. Up to three inputs at the same time.

Always in the know

Lena sends its data straight to the Feldfühler app over the wireless LoRaWAN protocol. So you always know whether your pump is running, the tank is full or someone has been at the control cabinet.

Built for the outdoors

A solar panel plus rechargeable battery keep it running for years with minimal maintenance. The rugged IP67 enclosure easily shrugs off rain, dust and heat.

Typical uses

Pump on/off, dry-run protection & tank level, water-meter pulses, valve/gate position, pressure monitoring or theft/access protection for the pump house and control cabinet.

Make Lena your attentive helper – it counts, reports and keeps watch! 🌱

• Functions: contact alarm & counting
• Inputs: up to 3 potential-free contacts
• Radio: LoRaWAN Class A, EU868
• Power: solar panel & 3,000 mAh Li-Ion battery
• Protection: IP67