A versatile and reliable solution for liquid control in industrial, residential, and tertiary applications
Finder, a manufacturer specializing in automation and control solutions, expands its renowned 72 Series with the launch of the new Type 72.51 level control relay, a device designed to monitor and regulate conductive liquids with filling and emptying functions (including window mode), ideal for a wide variety of sectors and applications.
The new Type 72.51 stands out for its adjustable sensitivity (from 5 to 150 kΩ), dual LED indicators (power supply and output contact status), and a robust design that allows for double safety insulation (6 kV – 1.2/50 μs) between power supply, contacts, and probes.
Main technical features of the Type 72.51
- Filling and emptying functions + window mode
- Selectable intervention delay: 0.5 or 7 seconds
- 1 changeover contact (CO), 6 A
- Modular DIN rail mounting (35 mm)
- Compact and multifunctional design
This model completes a range that allows maintaining the desired liquid level in tanks, cisterns, and containers, optimizing the operation of pumping and distribution systems.
Finder 72 Series: a complete range
The Finder 72 Series is comprised of liquid control devices, both level control relays and level floats, all with filling and emptying functions, designed to manage conductive liquids, including those used in food.
Featured Models: - 72.01 and 72.11: Probe-based level controllers (single level or minimum/maximum levels)
- 72.42: Dedicated relay for load alternation
- Multifunction versions with LED indicator
- Double insulation (6 kV – 1.2/50 μs)
- Load control in redundant systems
- DIN rail mounting (EN 60715)
Accessories and Probes:
Finder offers a wide range of probes to adapt the 72.01/11 models to different environments. The following can be used: - 2 probes for single level control
- 3 probes for minimum and maximum level control
- In conductive tanks, the tank itself can act as a common probe (B3)
- Combination of two relays to simultaneously manage emptying and filling functions in the same tank
The range also includes float-based devices: - Types 72.A1, 72.B1, and 72.C1, with approvals depending on the model
- 1 changeover contact, 10 A (resistive load) / 8 A (inductive)
- Available cable lengths: 2 m, 5 m, 10 m, 15 m, and 20 m
- Type 72.C1 with manual/automatic operation selector
Highlighted applications of the 72 Series
Residential and tertiary sectors - Level control in swimming pools, fountains, aquariums
- Flood control in bathrooms
- Pump control Submersible
Food sector - Condensation water control in cold storage counters
- Food liquid level control
- Level management in drinking water tanks and cisterns
Agriculture - Level control in irrigation canals
- Level control in water tanks, hydraulic dams, or underground wells
- Level control in vegetable water tanks or mixing facilities
Water treatment and distribution - Tank filling and emptying control
- Management of treated water in urban networks
- Control of slurry and industrial wastewater
- Regulation of solar-heated water supply
With this comprehensive range, Finder reaffirms its commitment to innovation and quality in the development of technological solutions for the automation of facilities in multiple sectors.
For more information, consult the documentation or contact one of our sales representatives here.
