Plug-in Water Detector SHT 241 with Mini Float Switch

SHT 241 Water Detector – Level Guard with Mini Float Switch for Sump, Cistern & Tank

Water, heating oil, or diesel rises, the SHT 241 immediately sounds an alarm. Just plug it in,

hang the mini float switch into the pit or cistern, and starting from a 4 cm level, a loud alarm tone (approx. 85 dB) sounds and the red LED flashes. If the level drops again, everything falls silent automatically.

Mains powered (230 V), no battery, 2.5 m robust LIYY cable (extendable up to 50 m). Especially suitable for wastewater and non-conductive liquids such as heating oil, diesel, vegetable or lubricating oil. The reliable early warning protection for anyone who doesn’t want wet surprises.

The technology is clever and robust: The mini float switch reacts precisely from a 4 cm fill level, perfect for pump sumps, drainage pits, cisterns, or oil tanks. Alarm comes directly from the socket device – loud and clear.

Automatic reset, no manual operation. LIYY cable is flame-retardant, self-extinguishing, temporarily water-resistant, and resistant to oils and fats. Optional mounting bracket (Art. No. 300787/300320) for fixed attachment.

The SHT 241 is more than a detector; it is your affordable watchdog for everything that can rise. Whether a defective pump, clogged drain, or overflowing cistern: It warns before the damage gets big. Homeowners, heating engineers, and facility managers love the instant installation and loud, clear alert, especially where normal fork sensors fail (wastewater, oil). Plug it in once, and it just works—potentially saving thousands of euros in an emergency.

SHT 241 At a Glance:

• Mini float switch: Responds from 4 cm level – ideal for pits & tanks.
• For dirt & oil: Heating oil, diesel, vegetable oil, lubricating oil – no problem.
• Loud alarm: Approx. 85 dB + red flashing LED – unmistakable.
• Automatic reset: Level drops = silence, no button needed.
• 2.5 m cable: Extendable up to 50 m (max. 2×0.14 mm² LIYY).
• No battery: 230 V continuous operation – always ready.
• Robust cable: Flame-retardant, oil- and grease-resistant.
• Made in Germany: Highest quality from Schabus.

Typical Applications – Where SHT 241 Prevents Damage Day by Day

• Pump sumps & drainage pits: Early warning before overflow.
• Cisterns & rainwater tanks: Monitor full or empty status.
• Oil tank rooms: Heating oil, diesel – instant alarm on leak.
• Basements & underground garages: Wastewater and oil-water mixes.
• Technical rooms: Under air conditioning and server systems.
• Business & industry: Machines with cooling or lubricating agents.

With the SHT 241, level protection starts at the socket – and the worry about overflow or leaks stops. Just plug it in. Loud alert. Automatic reset.

Scope of Delivery

• SHT 241 water detector with plastic mini float switch
• User manual

Safety Instructions

• Before installing or putting the device into operation, read the user manual carefully.
• Packaging material is not a toy. Keep it away from children.
• Do not open the device; it contains no parts that you need to maintain.

Intended Use

• The SHT 241 water detector is a device for detecting water level changes (minimum 4 cm).
• When the float switch is activated by water, an acoustic and visual alarm signal warns you of unexpected water ingress.
• The device can also be used for other liquids (e.g., heating oil, diesel, vegetable oil, lubricating oil, etc.) with a density of at least 0.7 g/cm³ or higher.
• The device is not approved for any other use than described above.