Product Category

Sensors

Contact Sensors / Liquid Leakage Sensors

Liquid Leakage Sensors

K7L-U[] / UD[][]

K7L-AT50[] / AT50D[][]

F03-16PE / 16PT / 15 / 16PS

F03-16SF / 16SFC

Liquid Leakage Sensor Amplifiers for Long-distance Wiring

K7L-U[] / UD[][]

Ultra-miniature Liquid Leakage Sensor Amplifier Enables Longest Liquid Leakage Monitoring Distance in Industry. K7L-UB and K7L-UDB are our Value Design products which increase the value of your control panels.

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Specification

Characteristics

Ambient temperature

Operating: -10 to 55°C

Ambient humidity

Operating: 45% to 85%

Insulation resistance

10 MΩ at 100 VDC between case and current-carrying parts

Dielectric strength

1,000 VAC at 50/60 Hz for 1 min between case and current-carrying parts

Power consumption

1 W max.

Response time

Operate: 800 ms max.
 Release: 800 ms max.
 Startup time after power ON: 2 s max.

Weight

Approx. 14 g

Ratings

Rated power supply
 voltage

12 to 24 VDC (Allowable voltage fluctuation range: 10 to 30 VDC)

Operate resistance

0 to 1 MΩ variable
 Note:
 The adjuster (ADJUST) on the top of the Sensor Amplifier sets the resistance for detection
 within the setting range. It is factory-set to the upper limit. (Normally, the K7L can be used with
 the adjuster at this setting.)

Disconnection
 detection function
 *

Detection signal: 10 VDC max., 200 ms
 Detection time: 10 s max.
 Recovery: Operation is recovered by resetting the power supply.

Release resistance

105% min. of operate resistance

Output
 configuration

Open-collector transistor output with 100 mA at 30 VDC max. for both liquid leakage detection
 and disconnection detection.
 Note:
 If the rightmost pin of the DIP switch on the side of the Sensor Amplifier is set to the down
 position, the output turns ON when liquid is detected; if it is set to the up position, the output
 turns OFF when liquid is detected.

Vibration resistance

10 to 150 Hz, 0.1-mm single amplitude with 15-m/s2 acceleration for 8 minutes 10 times each
 in X, Y, and Z directions

Shock resistance

150 m/s2 3 times each in six directions on 3 axes

Wiring distance

Wiring cable, Sensing Band: Total: 400 m max.
 Note:
 These values are possible on the condition that a completely insulated 3-conductor VCT cable
with a thickness of 0.75 mm2 and a dielectric strength of 600 V is used together with the Liquid
Sensing Band specified by OMRON. (A 0.2-mm2 cable can also be used.)

Accessories

Product Name

Terminal Block

Screwdriver for ADJUST

Terminator

Model

F03-20

---

F03-20T

K7L-U/UB

1

1

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K7L-UD/UDB/UDP/UDPB

1

1

1

* For the K7L-UD[][].