Omron K7L-AT50 — Liquid Leak Sensor Amplifier, 50 Mohm
SKU: K7L-AT50USD 99.00
Omron K7L-AT50 liquid leakage sensor amplifier, 12-24 VDC, NPN output, 4 sensitivity ranges to 50 Mohm. In stock, China shipping.
1-Year Warranty
Full manufacturer warranty
Global Shipping
Worldwide delivery available
Genuine Omron
100% authentic product
Ready to Ship
Usually ships within 24h
In Stock
This item is available for immediate shipment from our warehouse.
Contact for pricing, bulk discounts, and shipping
Product Overview
The Omron K7L-AT50 is a K7L-series conductive liquid leakage sensor amplifier, manufactured by Omron Corporation. Hengyixin Automation ships this sensor from our Xiamen warehouse with a 30-day DOA return window and a datasheet PDF included in the box.
It detects any conductive liquid that bridges two electrodes on a paired F03-16 sensing band, then switches an NPN open-collector output. The DIP switch on the side picks one of four operate-resistance ranges: 0 to 250 kohm, 0 to 600 kohm, 0 to 5 Mohm, or 0 to 50 Mohm. The ADJUST knob on top fine-tunes the trip threshold inside the selected range.
Supply is 12 to 24 VDC at 1 W max. The amplifier plugs into a P2RF-08-E round-pin DIN-rail socket (or a P2RFZ-08-E screw-terminal socket). A 50-meter 3-conductor VCT cable and a 10-meter sensing band are the rated maximums. The K7L-AT50D sibling adds sensor-disconnection detection; the K7L-AT50B is the same body in black.
Key Features
- K7L-series conductive liquid leakage sensor amplifier with 4 selectable operate-resistance ranges (250 kohm / 600 kohm / 5 Mohm / 50 Mohm)
- NPN open-collector output, 100 mA max at 30 VDC, DIP-switch selectable ON-when-leak or OFF-when-leak polarity
- Plugs into an 8-pin P2RF-08-E round-pin or P2RFZ-08-E screw-terminal DIN-rail socket, light-grey ABS body, 14 g
- Powers from 12 to 24 VDC at 1 W max, AC-coupled to the sensing band to prevent band erosion (4 surge current limited)
- SKU: K7L-AT50
- Series: Omron K7L-series conductive liquid leakage sensor amplifier
- Voltage: 12 TO 24 VDC
Best-Fit Applications
- Leak detection under a clean-room sink where the F03-16PE sensing band wraps the drain and trips a PLC over the 50 m VCT cable
- Floor-pan leak alarm in a semiconductor wet bench where the K7L AT50 amplifier drives a 24 VDC beacon via its NPN output
- Spare replacement on a chiller plant where the previous leakage relay failed and the F03-16PT sensing band stays in place
Buying Checklist
- Pick the K7L-AT50 for an NPN conductive leakage sensor amplifier with four DIP-switch ranges and a P2RF-08-E round-pin socket.
- Pick the K7L-AT50D instead when the panel also needs sensor-disconnection detection to flag a cut or removed band.
- Pick the K7L-AT50B instead when the cabinet needs the same K7L amplifier in a black housing for colour-coded fault wiring.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | Omron K7L-series conductive liquid leakage sensor amplifier |
| Model / SKU | K7L-AT50 |
| Supply Voltage | 12 to 24 VDC (allowable voltage fluctuation 10 to 30 VDC), 1 W max power consumption |
| Operate Resistance | 0 ohm to 50 Mohm adjustable, four DIP-switch ranges: 0-250 kohm, 0-600 kohm, 0-5 Mohm, 0-50 Mohm |
| Release Resistance | 105 percent min of set operate resistance (auto reset on power recycle) |
| Output | NPN open-collector transistor, 30 VDC max, 100 mA max, residual voltage 2 VDC max, DIP-switch ON-when-leak or OFF-when-leak polarity |
| Response Time | Operate 800 ms max, release 800 ms max, 2 s max start-up delay |
| Wiring Distance | Connecting cable 50 m max, sensing band 10 m max (with 0.75 mm2 600 V VCT 3-conductor cable) |
| Socket | Plugs into P2RF-08-E round-pin socket or P2RFZ-08-E screw-terminal socket (8-pin DIN-rail) |
| Insulation / Dielectric | 10 Mohm min at 100 VDC between case and current-carrying parts; 1,000 VAC at 50/60 Hz for 1 minute |
| Environment / Weight | -10 to +55 C operating, 45 to 85 percent humidity, IP20 case, approx. 14 g |
Manufacturer documentation
Omron's own product page, where the manufacturer's current specification and lifecycle information are published. We are an independent distributor and cannot mirror those documents; the link goes to Omron's site.
FAQ for K7L-AT50
What is the Omron K7L-AT50 used for?
It is the K7L-series conductive liquid leakage sensor amplifier. It connects to a paired F03-16PE or F03-16SF sensing band, watches the resistance between the two electrodes, and switches its NPN output when a conductive liquid (water, IPA, plating solution, coolant) bridges the band. It is the standard leak alarm for clean rooms, server rooms, and semiconductor wet benches.
K7L-AT50 vs K7L-AT50D - what is the difference?
Both share the same K7L body, 12-24 VDC supply, and four DIP-switch sensitivity ranges. The K7L-AT50 only flags a liquid leak. The K7L-AT50D adds sensor-disconnection detection that flags a cut, removed, or open-circuit sensing band on the same NPN output. Pick the AT50 when the band is in a protected tray; pick the AT50D when the band runs across the floor and may be damaged.
What sensing band works with the K7L-AT50?
Any Omron F03-16 sensing band. F03-16PE is the standard polyethylene-sheath band with a SUS316 core (1 m, 2 m, 5 m, 10 m, 15 m, 20 m, 25 m, 50 m lengths). F03-16SF is the flexible band with a colour-change inner sheath that flags the leak visually. F03-16PT is the polyolefin-sheath band for alkaline liquids. F03-16PS is a polyethylene point sensor for spot level / leak checks. F03-15 is the legacy band. The K7L-AT50 also accepts a 0.2 mm2 3-conductor cable.
Does the K7L-AT50 work on 24 VDC only?
Yes - the rated supply is 12 to 24 VDC with an allowable fluctuation of 10 to 30 VDC. Most installs feed the K7L-AT50 from the same 24 VDC rail that powers the PLC inputs. Power consumption is 1 W max. The K7L-AT50 does not accept 100-240 VAC; an AC-powered leakage relay is the K7L-UP-FLK instead.
How do I configure the K7L-AT50 ranges?
Set the DIP switch on the side of the amplifier to one of the four ranges (0-250 kohm, 0-600 kohm, 0-5 Mohm, 0-50 Mohm). For most purified water and IPA applications, range 1 (0-600 kohm) is the default. Then turn the ADJUST knob on top of the amplifier to fine-tune the trip threshold inside the selected range; the factory default is the upper limit. The rightmost DIP switch selects the output polarity: down = ON when leak detected; up = OFF when leak detected.
Similar Products
Explore related Omron models often viewed alongside this product.
