Water leakage detection sensor
Sensors that greatly affect the performance of leak detection With their excellent flexibility and adaptability to the surrounding environment, these sensors are widely used in buildings, data centers, and hospitals. With the age of big data under way, a water-cooling system is increasingly adopted to dissipate heat from equipment. The use of this product as built-in equipment is expanding. We have a diverse product lineup to meet the needs of our customers.
Features
- A detector suitable for a comprehensive disaster prevention monitoring system Control output contacts are provided to enable central control of multiple detectors.
- Monitoring a wide area with a single sensor The sensor in the form of a line reliably detects water in any part of its line, without malfunctioning due to humidity, and enables detection of pure water, acid and alkaline solutions.
- Wire break detection function Wire break is detected and alrted with a buzzer, lamp, and nonvoltage output contact.
- Simple to install, safe and easy to maintain The sensor’s weak energy circuit of 12.5VAC or lower assures safety. The sensor is highly flexible, easy to handle, and directly installable on metal.
Installation examples
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Installation at piping -
Installationaround equipment -
Installation underfree-access raised flooring
Product details
Detectors
Standard type
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Wall-mounted type - AD-AS-1AM for single-circuit systems
- This detector for single detection circuit issues an alert with a lamp (LED) and a buzzer when leakage or wire break is detected. Control output contact is also available.
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Wall-mounted type - AD-AS-5DRM and AD-AS-10DRM for multiple-circuit systems
- The standard types are for 5 or 10 circuits. The detectors issue an alert with a lamp (LED) and a buzzer when leakage or wire break is detected. Control output contact is available for each circuit or collectively.
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Built-in type - AD-AS-1WM for single-circuit systems
- This detector with a wire break detection function is attached to the DIN rail inside the panel.
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Built-in type - AD-AS-1C-SR for high sensitivity single-circuit systems
- This highly sensitive detector is attached to the DIN rail inside the panel or built into equipment to enable the detection of highly resistive liquids (pure water, chemicals, etc.).
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Built-in type - AD-AS-1DM for single-circuit systems
- This detector with AC/DC power supply is attached to the DIN rail inside the panel.
Location-detection type
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Wall-mounted type - Leak-location detection type,
AD-AS-1LCM-A (AC power supply with analog output) for single-circuit systems - Combined with its dedicated sensor, the detector digitally displays the leak locations.
- Leak-location detection type,
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Built-in type - Leak-location detection type,
AD-AS-1LDM-A (AC/DC power supply) for single-circuit systems - Combined with its dedicated sensor, the detector digitally displays the leak locations.
- Leak-location detection type,
Detector specifications
For single-circuit systems
| Specification/model number | For single-circuit systems | |||
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| AD-AS-1AM | AD-AS-1WM | AD-AS-1DM | AD-AS-1C-SR | |
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| Number of sensor circuits | 1 | |||
| Power supply voltage | AC100V～240V | AC24V、DC24V | AC100V、AC200V | |
| Frequency | 50/60Hz | |||
| Sensor-applied voltage | 2.8VAC maximum | 5.3VAC maximum | 5.3VAC maximum | 2.8VAC maximum |
| Leakage warning | Blinking red LED lamp/Buzzer | Blinking orange LED lamp | ||
| Wire break warning | Blinking red LED lamp/Buzzer | Blinking orange LED lamp | ||
| Control output contact rated load (resistance load) | AC250V 6.0A、DC24V 6.0A | AC125V 0.4A、DC30V 2.0A | ||
| Current consumption | 4.5VA maximum | 2VA maximum | 3VA maximum | 2VA maximum |
| Sensitivity adjustment | Yes | |||
| Check function | Yes | — | ||
| Outer dimensions (mm) | W120×H124×D55 | W45×H72×D75 | W22×H76×D87 | W45×H72×D67 |
| Weight (kg) | Approx. 0.3 | Approx. 0.12 | Approx. 0.08 | Approx. 0.18 |
| Box color | Ivory white | Gray | ||
Leak-location detectors for multiple-circuit systems
| Specification/model number | For multiple-circuit systems | Leak-location detection type | ||
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| AD-AS-5DRM | AD-AS-10DRM | AD-AS-1LCM-A | AD-AS-1LDMA | |
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| Number of sensor circuits | 5 | 10 | 1 | |
| Power supply voltage | AC100V～240V | AC100V～AC240V | AC24V、DC24V | |
| Frequency | 50/60Hz | |||
| Sensor-applied voltage | 5.5VAC maximum | 5.5VAC maximum | 12.5VAC maximum | |
| Leakage warning | Blinking red LED lamp/Buzzer | Lighting red LED lamp/Buzzer/ Digital display of leak locations/Analog output of 4-20mA |
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| Wire break warning | Blinking red LED lamp/Buzzer | Lighting red LED lamp/Buzzer/Display “_____” | ||
| Control output contact rated load (resistance load) | AC125V 0.4A、DC30V 2.0A | AC125V 0.4A、DC30V 2.0A | ||
| Current consumption | 12VA maximum | 20VA maximum | 5W maximum | 5W maximum |
| Sensitivity adjustment | Yes | |||
| Check function | Yes | — | ||
| Outer dimensions (mm) | W300×H330×D100 | W180×H125×D35 | W106×H96×D57 | |
| Weight (kg) | Approx. 5.5 | Approx. 0.3 | Approx. 0.25 | |
| Box color | Light beige (5Y7/1) | Gray | ||
Sensors
Standard type
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Non-color changing typeAD-S sensorThis line-type sensor detects even the slightest leakage of conductive liquid.
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Color-recovery typeAD-RS sensorThe part of the sensor that has absorbed water turns red. When it dries, it returns to its original color (white).
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Color changing typeAD-HS sensorThe part of the sensor that has absorbed water turns red and remains red even after drying.
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Flat typeAD-FH sensorThis flat sensor has excellent moisture resistance and recovery, unaffected by dew condensation.
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Chemical-resistant typeAD-FH-S sensorThis highly durable sensor uses SUS for the electrodes.
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Flame-retardant typeAD-BRS sensorThis flame-retardant sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.
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Flame-retardant flat typeAD-BFS sensorThis flame-retardant flat sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.
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Flame-retardant thin typeAD-BRS-S sensorThis flame-retardant thin sensor complies with flame-retardant standard NFPA262 (formerly UL910).
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Point typeAD-S sensorThis floor-standing sensor is designed to be installed in a place where water may gather.
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Point typeAD-PA-RThis floor-standing sensor is designed to be installed in a place where water may gather.
* Built-in wire break detection terminal function -
Wire break detection terminalZT-2This terminal is used for on-site installation of sensors.
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Wire break detection terminal for high-sensitivity detectorsZT-SRThis terminal is dedicated to high-sensitivity type.
Location-detection type
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Location-detection typeAD-LS sensorThis sensor is dedicated to leak-location detection.
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Flame-retardant, location-detection typeAD-BRL sensorThis flame-retardant, location-detection dedicated sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.
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Flame-retardant, location-detection flat typeAD-BFL sensorThis flame-retardant, location-detection dedicated flat sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.
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Wire break detection terminal for location detectionZT-L2This terminal is dedicated to on-site installation of a leak-location detection system.
Sensor fixtures
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Sticker (adhesive tape type)CA-14This sticker with adhesive tape is used to fix the sensor wiring.
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Sticker (bridge type)SP-1SFThis bridge-shaped sticker comes with adhesive tape.
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Pin saddle (with concrete nails)PS-1This pin saddle comes with concrete nails.
* Made by Sekisui
Sensor specifications
| Specification/model number | AD-S sensor | AD-RS sensor | AD-HS sensor |
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| Electrode inner layer | Electrode 1: Plastic single yarn braided to tin-plated soft copper wire, 0.3 mm2 | ||
| Electrode 2: Plastic single yarn braided to tin-plated soft copper wire, 0.3 mm2 | |||
| ̶̶ | Via red color emitting yarn | ||
| Outer layer | Plastic yarn braided | ||
| Outer dia. | Approx. dia. 4 mm | ||
| Lead wire | ̶̶ | ||
| Detection sensitivity | 3 ml maximum: One drop (0.05 ml) per second*1 | ||
*1 Ex-factory setting
| Specification/model number | AD-FH sensor | AD-FH-S sensor | AD-PA sensor | AD-LS sensor | |
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| Electrode inner layer | Electrode 1 | Plastic single yarn braided to tin-plated soft copper wire, 0.3 mm2 | Plastic single yarn braided to SUS316, 0.33 mm2 | Stainless plate (1mm) | Plastic single yarn braided to tin-plated soft copper wire, 0.3 mm2 |
| Electrode 2 | Plastic single yarn braided to tin-plated soft copper wire, 0.3 mm2 | Plastic single yarn braided to SUS316, 0.33 mm2 | Stainless plate (1mm) | Plastic single yarn braided to tin-plated soft copper wire, 0.3 mm2 | |
| Electrode 3 | ̶̶ | Plastic single yarn braided to resistance wire, dia. 0.4 mm | |||
| Outer layer | Plastic yarn braided | Soft PVC resin mold | Plastic yarn braided | ||
| Outer dia. | Approx. 6.5mm x 2.0mm | Approx. 40 mm x 50 mm x 14mm | Approx. dia. 3.5 mm | ||
| Lead wire | ̶̶ | MF-VCTF0.5mm23.5m | ̶̶ | ||
| Detection sensitivity | Sensing leak length: 60-90mm (reference water volume: 14-18ml) | Water level 10mm minimum | 3ml maximum: One drop (0.05ml) per second | ||
| Specification/model number | AD-BRS sensor | AD-BFS sensor | AD-BRS-S sensor | AD-BRL sensor | AD-BFL sensor | |
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| Electrode inner layer | Electrode 1 | Conductive ETFE-coated PPS monofilament (0.25mm) braided on tin-plated soft copper wire, 0.33mm2 | Conductive ETFE-coated (black) basalt braided on tin-plated soft copper wire, 0.33mm2 | Tin-plated soft copper stranded wire, 0.33mm2 | Conductive ETFE-coated (black) PPS monofilament (dia. 0.2mm) braided on tin-plated soft copper wire, 0.33mm2 | Basalt braided on the stranded wires of (1) and (2) (1) Conductive ETFE-coated (black), on tin-plated soft copper wire, 0.33mm2 (2) Insulated ETFE-coated wire (yellow), on tin-plated soft copper wire, dia. 0.51mm |
| Electrode 2 | Conductive ETFE-coated PPS monofilament (0.25mm) braided on tin-plated soft copper wire, 0.33mm2 | Conductive ETFE-coated (black) basalt braided on tin-plated soft copper wire, 0.33mm2 | Tin-plated soft copper stranded wire, 0.33mm2 | FEP wires | Basalt braided on the stranded wires of (3) and (4) (3) Conductive ETFE-coated (black), on resistance wire, dia. 0.40mm (4) Insulated FEP-coated wire (blue), on tin-plated soft copper wire, 0.5mm2 | |
| Electrode 3 | ̶̶ | Conductive ETFE-coated (black) PPS monofilament (dia. 0.25mm) braided on resistance wire, dia. 0.40mm | ̶̶ | |||
| Outer layer | Basalt braid | ETFE monofilament | Basalt braid | Basalt braid | ETFE monofilament | |
| Outer dia. | Approx. dia. 4mm | Approx. 6.5mm x 2.2mm | Approx. dia. 2.7mm | Approx. dia. 4mm | Approx. 6.5mm x 2.2mm | |
| Lead wire | ̶̶ | |||||
| Detection sensitivity | 3.0ml maximum | Leak length: 100ml maximum | 3.0ml maximum | Leak length: 100ml maximum | ||
System configuration example
Detection principle
An electrical path is formed between electrodes 1 and 2 via water (conductive liquid). Liquid leakage is detected when the resistance there decreases.
Features
Safe and secure sensors built with the know-how of cable manufacturers
The sensor in the form of a line reliably detects water in any part of its line, without malfunctioning due to humidity, and enables detection of pure water, acid and alkaline solutions.
- Excellent environmental characteristics The sensor's two-layer structure operates normally even in a hot and humid environment (60°C and 95% RH).
- Detection of small amount (3 ml or less at our standard sensitivity) The absorption property of the external braid ensures reliable capture of water.
Excellent workability
The sensor made of flexible materials is easy to install anywhere. The sensor’s weak energy circuit of 12.5VAC or lower assures safety.
- Installation examples The sensor is easy to install anywhere, such as piping, floors, walls, and ceilings. The sensor does not create undetectable blind spots and can build an effective detection network.
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Installation at piping -
Installation around equipment -
Installation under free-access raised flooring
Easy identification of leak locations
- Location-detection type The leak locations detected by the sensor are digitally displayed in increments of meters. The locational data can also be output.
- The sensor turns red (TATSUTA's proprietary function) The part of the sensor that has absorbed water turns red, enabling quicker identification and recovery than by visual inspection.
- For inquiries about products