Products & Services System products (liquid leakage detection)

Water leakage detection sensor

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

  • Installation at piping
    Installation at piping
  • Installationaround equipment
    Installationaround equipment
  • Installation underfree-access raised flooring
    Installation underfree-access raised flooring

Product details

Detectors

Standard type
  • AD-AS-1AM for single-circuit systems
    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.
  • AD-AS-5DRM and AD-AS-10DRM for multiple-circuit systems
    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.
  • AD-AS-1WM for single-circuit systems
    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.
  • AD-AS-1C-SR for high sensitivity single-circuit systems
    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.).
  • AD-AS-1DM for single-circuit systems
    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
  • AD-AS-1LCM-A (AC power supply with analog output) for single-circuit systems
    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.
  • AD-AS-1LDM-A (AC/DC power supply) for single-circuit systems
    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.

Detector specifications

For single-circuit systems
Specification/model number For single-circuit systems
AD-AS-1AM AD-AS-1WM AD-AS-1DM AD-AS-1C-SR
Product photo
AD-AS-1AM
AD-AS-1WM
AD-AS-1DM
AD-AS-1C-SR
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
AD-AS-5DRM AD-AS-10DRM AD-AS-1LCM-A AD-AS-1LDMA
Product photo
AD-AS-5DRM
AD-AS-10DRM
AD-AS-1LCM-A
AD-AS-1LDMA
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
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
  • Non-color changing type AD-S sensor
    Non-color changing typeAD-S sensor

    This line-type sensor detects even the slightest leakage of conductive liquid.

  • Color-recovery type AD-RS sensor
    Color-recovery typeAD-RS sensor

    The part of the sensor that has absorbed water turns red. When it dries, it returns to its original color (white).

  • Color changing type AD-HS sensor
    Color changing typeAD-HS sensor

    The part of the sensor that has absorbed water turns red and remains red even after drying.

  • Flat type AD-FH sensor
    Flat typeAD-FH sensor

    This flat sensor has excellent moisture resistance and recovery, unaffected by dew condensation.

  • Chemical-resistant type AD-FH-S sensor
    Chemical-resistant typeAD-FH-S sensor

    This highly durable sensor uses SUS for the electrodes.

  • Flame-retardant type AD-BRS sensor
    Flame-retardant typeAD-BRS sensor

    This flame-retardant sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.

  • Flame-retardant flat type AD-BFS sensor
    Flame-retardant flat typeAD-BFS sensor

    This flame-retardant flat sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.

  • Flame-retardant thin type AD-BRS-S sensor
    Flame-retardant thin typeAD-BRS-S sensor

    This flame-retardant thin sensor complies with flame-retardant standard NFPA262 (formerly UL910).

  • Point type AD-S sensor
    Point typeAD-S sensor

    This floor-standing sensor is designed to be installed in a place where water may gather.

  • Point type AD-PA-R
    Point typeAD-PA-R

    This 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 terminal ZT-2
    Wire break detection terminalZT-2

    This terminal is used for on-site installation of sensors.

  • Wire break detection terminal for high-sensitivity detectors ZT-SR
    Wire break detection terminal for high-sensitivity detectorsZT-SR

    This terminal is dedicated to high-sensitivity type.

Location-detection type
  • Location-detection type AD-LS sensor
    Location-detection typeAD-LS sensor

    This sensor is dedicated to leak-location detection.

  • Flame-retardant, location-detection type AD-BRL sensor
    Flame-retardant, location-detection typeAD-BRL sensor

    This flame-retardant, location-detection dedicated sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.

  • Flame-retardant, location-detection flat type AD-BFL sensor
    Flame-retardant, location-detection flat typeAD-BFL sensor

    This flame-retardant, location-detection dedicated flat sensor complies with flame-retardant standard NFPA262 (formerly UL910) and has excellent chemical resistance.

  • Wire break detection terminal for location detection ZT-L2
    Wire break detection terminal for location detectionZT-L2

    This terminal is dedicated to on-site installation of a leak-location detection system.

Sensor fixtures
  • Sticker (adhesive tape type) CA-14
    Sticker (adhesive tape type)CA-14

    This sticker with adhesive tape is used to fix the sensor wiring.

  • Sticker (bridge type) SP-1SF
    Sticker (bridge type)SP-1SF

    This bridge-shaped sticker comes with adhesive tape.

  • Pin saddle (with concrete nails) PS-1
    Pin saddle (with concrete nails)PS-1

    This pin saddle comes with concrete nails.
    * Made by Sekisui

Sensor specifications

Specification/model number AD-S sensor AD-RS sensor AD-HS sensor
Product photo
AD-S sensor
AD-RS sensor
AD-HS sensor
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
Product photo
AD-FH sensor
AD-FH-S sensor
AD-PA sensor
AD-LS sensor
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
Product photo
AD-BRS sensor
AD-BFS sensor
AD-BRS-S sensor
AD-BRL sensor
AD-BFL sensor
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

System configuration example

Detection principle

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
Leakage sensor cross section (AD-S/AD-RS sensors)
Leakage sensor cross section (AD-S/AD-RS sensors)

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.
  • Installation at piping
    Installation at piping
  • Installation around equipment
    Installation around equipment
  • Installation under free-access raised flooring
    Installation under free-access raised flooring
Easy identification of leak locations
Easy identification of leak locations
* Sample photo
  • 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.
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