17.5 mm wide conductive level controller

Ideal for water level control. Sensitivity adjustment and timer for easy usage.

  • Sensitivity adjustment from 10k to 100 kΩ
  • Enables easy onsite adjustment
  • ON-delay timer from 0.1 to 10 s
  • Ideal as countermeasure for waves on liquid surfaces
  • Width of 17.5 mm to reduce space required in panels
  • Push-in plus Technology that reduce wiring work
  • UL listed for easy shipping to North America
  • Double-insertion holes for crossover wiring (all terminals)
  • Models with transistor outputs added for low contact wear
  • RoHS compliant
Specifications & ordering info

Ordering information

Power supply voltage

Relay output

Order code


Relay: SPDT contact output


Transistor: Open collector


100 to 240 VAC

Relay: SPDT contact output


Transistor: Open collector


Accessories (Order separately)



Order code

Front cover



Electrode holders/underwater electrodes

For general-purpose use, such as water supply lines


For areas with limited space

PS-31 SUS304, 300 mm

For liquids with low resistance


When mounting strength is required


For resistance to high-temperature or high-pressure liquids


For resistance against corrosion


For installation at long distances from the liquid level


Electrode rods (Set with the connection nuts, lock nuts, and tightening screws)

Purified water service, industrial water, and sewage

F03-60 SUS304

Purified water service, industrial water, sewage, and weak alkaline solutions

F03-60 SUS316

Protective cover

Electrode holders for the PS or BF series


Mounting piece

Electrode Holder for the PS Series



To prevent contact between electrodes, one pole

F03-14 1P

To prevent contact between electrodes, three poles

F03-14 3P

To prevent contact between electrodes, five poles

F03-14 5P





Power supply voltage

24 VAC 50/60 Hz, 24 VDC

100 to 240 VAC 50/60 Hz

Voltage across electrodes

5 V p-p (Approx. 20 Hz)

Power consumption

1.8 VA/1 W max.

2.5 VA max.

Operating resistance

10k to 100 kΩ (variable)

Reset resistance

250 kΩ max.

Response time

Approx. 0.1 to 10 s (variable)

Length of cable

100 m max. (fully insulated 3-core 0.75-mm2 cabtyre cable, 600 V)


Power PWR: Green, Output (OUT): Yellow

Output form

Relay: SPDT contact output

Transistor: Open collector

Output contact ratings

Resistive load

5 A at 250 VAC
5 A at 30 VDC

Inductive load

1 A at 250 VAC
0.2 A at 48 VDC

Minimum load

5 VDC, 10 mA (reference values)

Mechanical life

10 million operations min.

Electrical life

5 A at 250 VAC or 30 VDC: 50,000 operations
3 A at 250 VAC or 30 VDC: 100,000 operations

Transistor output

Contact form

SPST-NO (Open collector)

Rated voltage

24 VDC (maximum voltage: 26.4 VDC)

Maximum current

50 mA DC

Ambient operating temperature

−20 to 60°C (with no condensation or icing)

Storage temperature

−25 to 65°C (with no condensation or icing)

Case material

PC, UL 94 V-0


Approx. 100 g

Size in mm (H × W × D)


Operating voltage range

85% to 110% of rated voltage


Approved standards

EN 61010-1

Installation environment: pollution level 2, Overvoltage category II


EN 61326-11

Safety standards

UL 61010-1 (Listing), Korean Radio Waves Act (Act 10564), CCC: GB14048.5

Degree of protection

Terminals: IP20

1. Industrial Electromagnetic Environment (EN/IEC 61326-1, Table 2)

1. Industrial Electromagnetic Environment (EN/IEC 61326-1, Table 2)

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