finder 5…150 72 Series Level Control Relays User Guide

5…150 72 Series Level Control Relays
User Guide

5…150 72 Series Level Control Relays

Level control relays and float switches with emptying or filling functions for conductive liquids and the beverage sector

ABOUT US

Finder was founded in Italy in 1954. Since then it has been designing and manufacturing a wide range of electromechanical and electronic components for both the residential and industrial sectors.
Today, thanks to its global vision, Finder now distributes its products around the world through a network of 29 company-owned subsidiaries and more than 80 trade partnerships.
Finder is an international family made up of more than 1300 individuals, all united by the same values and passion for our products.14,500 different products to satisfy a myriad of applications. From products at the heart of automation to the control of machines, power, time, temperature, liquid level and light OUR PRODUCTS CARRY MORE CERTIFICATIONS THAN ANY OTHER RELAY MANUFACTURER
FINDER IS AN ITALIAN BRAND WITH A WORLDWIDE PRESENCE
4 PRODUCTION PLANTS IN EUROPE
29 SUBSIDIARIES
+ 80 OFFICIAL DISTRIBUTORS
ENVIRONMENTAL, SOCIAL AND GOVERNANCE (ESG)
Finder considers social and environmental sustainability as fundamental principles of doing business, just as it believes that business growth must develop in synergy with a conscious vision of the future.
That is why Finder is committed to reducing and eliminating CO2 emissions, focusing on circularity, caring for its employees to foster a safe, fair and inclusive work environment, spreading a culture of integrity and transparency, and collaborating with stakeholders who share its values.
AUTONOMY AND INDEPENDENCE
Finder’s managerial, financial and technological autonomy allows optimal control over all its business processes, the results of which include simplified customs procedures and a high reliability of commercial relations.
This focus is demonstrated by the company’s commitment to the following internationally recognized projects and certifications:

ISO 9001:2015
Quality  management system| ISO 14001:2015
Environmental management system

ISO 45001:2018
Health and safety management system| ISO 14064-1 2018
Carbon Footprint verification

FSC
Forest Stewardship Council| AEOF
Simplified customs and enhanced supply chain security| Cribis Prime Company
Recognition of highest reliability of commercial relations

Applications everywhere

Residential and commercial sectors

• Level control for pools, fountains and aquariums
• Flood control for laundries and utility rooms
• Submerged pump control

Food

• Condensation control for refrigerated cabinets
•  Level control for the beverage sector
•  Level control of drinking water tanks

Agriculture

• Level control for irrigation channels and systems
• Level control for water tanks, reservoirs or underground wells
• Level control for sewage tanks or mixing plants

Water treatment and distribution

• Control of filling and emptying of tanks
• Control of emptying and filling functions for treated drinking water
• Level control for sewage treatment plants
• Controlling the supply of hot water heated by solar energy

Type 72.01/11 Level control relays for conductive liquids
Are suitable for the level control of conductive liquids.
2 electrodes for control about a single level, or 3 electrodes for control between minimum and maximum limits.

• Emptying or filling functions
• Control about a single level or between Min./Max. limits
• LED indicator, of contact status
• 1 CO (SPDT) 16 A – 250 V AC
• Positive logic output
• Nominal voltage AC or DC
• Special version for low loads down to 5 V, 1 mA
• Reinforced insulation between supply/contacts/electrodes (6 kV – 1.2/50 μs)
• 35 mm rail (EN 60715) mount

230…240 V
Nominal voltage DC| 24V| 24 V
Insulation: supply/contacts/electrodes| 6 kV| 6 kV
Electrical life at rated load| 100.000 cycles| 100.000 cycles
Ambient temperature| – 20…+60°C| – 20…+60°C
Functions| FL = Level control by Filling,
Long (7 s) run-on delay
EL = Level control by Emptying,
Long (7 s) run-on delay FS = Level control by Filling,
Short (0.5 s) run-on delay ES = Level control by Emptying,
Short (0.5 s) run-on delay| F=Level control by Filling,
Run-on time fixed at 1 s
E=Level control by Emptying,
Run-on time fixed at 1 s

Applications

230…240 V AC
72.01.8.400.0000| Sensitivity range adjustable (5…150)kΩ| 400 V AC
72.01.9.024.0000| Sensitivity range adjustable (5…150)kΩ| 24 V DC
72.11.8.024.0000| Sensitivity fixed 150 kΩ| 24 V AC
72.11.8.125.0000| Sensitivity fixed 150 kΩ| 110…125 V AC
72.11.8.240.0000| Sensitivity fixed 150 kΩ| 230…240 V AC
72.11.9.024.0000| Sensitivity fixed 150 kΩ| 24 V DC

Type 72.01 and 72.11
Probes and accessories for liquid level control
A wide and diverse range of electrodes allow the Types 72.01 and 72.11 level control relays to work in many diverse applications. Normally 2 electrodes are used for the control about a single level, although 3 probes can be used for level control between “Minimum” and “Maximum” levels. It is possible to use the tank itself as the common electrode (terminal B3), if it is made of a conductive material. If two different levels are required to be set-up within the same tank, it is possible to do this by simply utilising two level control relays.

| Type 072.01.06 – Cable length: 6 m (1.5 mm2 ) Type 072.01.15 – Cable length: 15 m (1.5 mm2) Suspended electrode for conductive liquids. Suitable for level monitoring in wells and reservoirs not under pressure. All materials used are compatible with food processing applications.
---|---
| Type 072.02.06 – Cable length (blue colour): 6 m (1.5 mm2)
Suspended electrode for swimming pools with high levels of chlorine, or in salt-water pools with high levels of salinity.
High quality electrode material: stainless steel (AISI 316L) with high corrosion resistance. Max. liquid temperature +100°C.
| Type 072.41
Suspended electrode for wells and tanks.
High quality electrode material: stainless steel (AISI 316L) with high corrosion resistance.
Plastic parts made of polypropylene for good resistance to aqueous solutions of inorganic salts, acids, alkaline solutions, alcohol, some oils and washing solutions.
Physiologically harmless and therefore particularly suitable for use in the food and pharmaceutical sectors. Max. liquid temperature +80°C.
| Type 072.51
Electrode holder suitable for metal tank with G3/8” fitting. The tank can be used as the common electrode and electrically wired to the common terminal B3 of the 72.01 / 11 relay by utilising the threaded part and fixing nut as a terminating point. The total length of the probe is obtained by connecting an appropriate number of 072.500
electrodes. High quality electrode material: stainless steel (AISI 316L) with high corrosion resistance. Max. liquid temperature +100°C.
| Type 072.53
Electrode holder with three poles, for overhead mounting in wells and tanks.
The total length of the probes is obtained by connecting an appropriate number of 072.500 electrodes. High quality electrode material: stainless steel (AISI 303) with high corrosion resistance. Max. liquid temperature +70°C.
| Type 072.503
Electrode separator (for three pole electrode holder 072.53). Use to avoid electrodes touching where otherwise they might sway due to their length.
| Type 072.500 – Electrode – 475 mm long, M4 thread, stainless steel (AISI 316L) Type 072.501 – electrode connector, M4 thread, stainless steel (AISI 316L).
Multiple electrodes may be interconnected to provide required length. Illustration of interconnection of electrodes.

| Type 072.11
Floor water sensor, flood warning. Designed for the detection and signaling of the presence of floor surface water and for the detection of condensation (for example in refrigerated cabinets).

Type 72.42
Priority change relay
This relay is recommended to equalize the wear in equipment, such as pumps, compressors, air conditioning, etc., when the plant comprises two units, one of which is spare.

• 2 independent NO output, 12 A – 250 V AC
• 4 functions
•  2 independent control signals, insulated from supply
• Nominal voltage AC and DC
•  35 mm rail (EN 60715) mount

(110…240 V AC/DC)
Insulation: supply/contacts/electrodes| 6 kV
Electrical life at rated load| 100.000 cycles
Ambient temperature| – 20…+50°C
Functions| MI = Outputs alternate on successive applications of supply voltage ME = Outputs alternate on successive applications of control signal Si
M1/M2 = In case of a load malfunction, it is possible to force the operation
of a specific output

Examples for the management of two pumps
Function (MI)
This shows the 72.42 Priority change relay working in conjunction with a single 72.01 level controller. Under normal conditions the liquid level is expected to remain within the range shown as Min to Max. In this case the function of the 72.42 will be to alternate the duty between both pumps, to even wear across both pumps. There is no provision to run both pumps simultaneously.  Function (ME)
This shows the 72.42 Priority change relay working in conjunction with two 72.01 level controllers. Under normal conditions the liquid level is expected to remain within the range shown as Min to Max. In this case the function of the 72.42 will be to alternate the duty between both pumps, to even wear across both pumps.
Should the liquid level rise above the Alarm level then the function of the 72.42 will call for the simultaneous operation of both pumps, by virtue of the signal to terminal B3 from the Alarm/Low level controller.
Note: due to the low level of 72.42 control signals, it is suggested to use level controller 72.01.8.240.5002 because of its superior low load switching capability.

Type 72.A1
Float switch for grey water
Float switch for grey water, suitable for automatic pumping, professional plumbing systems and waste water.
Counterweight (110 g) with cable grip, included.

• 10 A (resistive load), 8 A (inductive load)
• Emptying or filling functions
• Cable length 5 m, 10 m, 15 m or 20 m
•  Cable material: POLYPROPYLENE H05 RN F (approved TÜV)

Counterweight (110 g) for Type 72.A1. Included in the package.
Fixes to the cable to allow adjustment of the overall level and the switching hysteresis.

Applications When black and brown wires are used, the circuit opens when the float is down and closes when the float in up. In this case the blue wire must be insulated. When brown and blue wires are used, the circuit opens when the float is up and closes when the float in down.
In this case the black wire must be insulated.

Type 72.A1 – ACS
Float switch for liquid foodstuff and potable water
Float switch with 2 watertight chambers, for liquid foodstuff and potable water. Supplied with counterweight.
Made from non-toxic materials suitable for permanent immersion in drinking water. Ideal for: – aqueducts

• drinking water fountains
• drinks and food products
•  aquariums – fish hatcheries – swimming pools.

This version permits use in water with:
Sodium Chloride – Salt Water: max 50%
Sodium Hydrate – Caustic Soda: max 40%
Sodium Hypochlorite – Bleach: max 15%

• Emptying or filling functions
• Cable length 5 m, 10 m, 15 m or 20 m
• 10 A (resistive load), 8 A (inductive load)

Applications When black and brown wires are used, the circuit opens when the float is down and closes when the float in up. In this case the blue wire must be insulated. When brown and blue wires are used, the circuit opens when the float is up and closes when the float in down. In this case the black wire must be insulated.

Type 72.B1
Float switch for black water
Float switch for black water systems, drainage plants and pumping stations.
Supplied with fixing kit.

• 10 A (resistive load), 8 A (inductive load)
• Emptying or filling functions
• Cable length 5 m, 10 m, 15 m or 20 m
•  Cable material: POLYPROPYLENE H05 RN F (approved TÜV)

Applications When black and brown wires are used, the circuit opens when the float is down and closes when the float in up. In this case the blue wire must be insulated.When brown and blue wires are used, the circuit opens when the float is up and closes when the float in down.
In this case the black wire must be insulated.

Type 72.C1
Float switch space saving
Suitable for all those situations where the lack of space precludes the use of a normal float switch
Applications:

• Immersion pump
• Pumping tanks
• Lifting systems
• Clean or waste water wells
• Clean, cloudy, industrial and chemical waters
• Magnetic opening and closing contact
• Particularly suitable for clean water emptying and filling applications

Functions
Emptying: when black and brown wires are used, the circuit opens when float is down and closes when the float is up.
Note: the blue/grey wire must be insulated.
Filling: when black and blue/grey wires are used, the circuit closes when float is down and opens when the float is up.
Note: the brown wire must be insulated.
N.B: The grounding wire is always yellow and green.

The tank fills| The water reaches the max level
and it raises the whole floating body| High level starts the
pump and the tank drains

The water reaches the
minimum level and the weight of the
floating body disengages the magnet| Low level stops the pump

Prices, features, specifications, capabilities, appearance and availability of our products and services are subject to change without notice.
FINDER assumes no responsibility for the presence of possible errors or insufficient information in this document. In case of discrepancies between the printed and online versions, the latter prevails.

FINDER S.p.A. sole proprietorship
Via Drubiaglio, 14 – 10040 ALMESE (TO) ITALY
tel +39 011 9346211 – export@findernet.com
findernet.comZGUENXX72XX – VII/2023 – Level control relays for conductive liquids

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