Detects conductive liquid leaks
Detects conductive liquid leaks.
WS303 Milesight Mini Leak Detection Sensor
Mini Leak Detection Sensor
Order codeWS303 In stockOfficial distributor
The WS303 is a Mini Leak Detection Sensor. A built-in buzzer raises a real-time alarm on site, while Milesight D2D lets the WS303 link directly with other Milesight devices, without a gateway.
- LoRaWANCN470/IN865/RU864/EU868/US915/
- Power~5.7 years (one hour leakage
- ProtectionIP67
- Operating–10 … +60 °C
- In stockVilnius warehouse · EU
- In stockLondon warehouse · UK
Dispatch and lead time are confirmed in the quote.
- Official distributor
- 17+ years in IoT
- Installation support
Manufacturer warranty24 months
Overview
WS303 overview
Overview
The WS303 is a tiny yet capable leak detection sensor. It detects the presence of water and sends an alarm over LoRaWAN, helping prevent damage and costly losses from undetected leaks.
Leak Detection
A small water probe detects conductive liquids and triggers as soon as the liquid level reaches just 0.5 mm. This gives early warning before a small leak becomes a major problem.
Rugged & Wire-Free
An IP67 waterproof enclosure suits harsh and wet environments, while a replaceable 590 mAh battery delivers up to 5 years of wire-free operation for clean, flexible placement.
Local & Direct Alarms
A built-in buzzer raises a real-time alarm on site, while Milesight D2D lets the WS303 link directly with other Milesight devices, without a gateway, to trigger valves or other responses instantly.
Setup
One-touch NFC configuration through the Milesight ToolBox app makes setup quick. Mount it on a desktop or with 3M tape wherever leaks may occur.
Key features
Trigger at just 0.5 mm
Trigger at just 0.5 mm liquid level.
IP67 waterproof enclosure
IP67 waterproof enclosure.
Built-in buzzer for local alarms
Built-in buzzer for local alarms.
Milesight D2D
Milesight D2D, gateway-free control.
One-touch NFC configuration
One-touch NFC configuration.
Battery life up to 5
Battery life up to 5 years.
Conductive-liquid water probe
Conductive-liquid water probe.
Technical data
WS303 specifications
| Specifications | |
|---|---|
| Technology | LoRaWAN®, Milesight D2D |
| Antenna | Internal antenna |
| Frequency | CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4 |
| Tx Power | 16 dBm (868 MHz) / 20 dBm (915 MHz) / 19 dBm (470 MHz) |
| Sensitivity | −137 dBm @300bps |
| Mode | OTAA/ABP Class A |
| Specifications | |
| Liquid Type | Conductive liquid |
| Trigger Condition | Once liquid level reaches 0.5 mm |
| Specifications | |
| Buzzer | Supported |
| Configuration | Mobile app via NFC or downlink |
| Advanced Feature | Milesight D2D controller, water leakage alarm |
| Specifications | |
| Power Supply | 1 × 590 mAh CR2450 lithium battery (replaceable) |
| Battery Life | ~5.7 years (one hour leakage per week, 25 °C) |
| Operating Temperature | −10 °C ~ +60 °C |
| Relative Humidity | 0 ~ 100% (non-condensing) |
| Ingress Protection | IP67 |
| Material & Colour | ABS + PC, white |
| Weight | 36.4 g (battery included) |
| Dimensions | 63 × 63 × 14 mm |
| Installation | 3M tape mounting or desktop |
| Specifications | |
| Regulatory | CE, FCC |
| Environmental | RoHS |
No specification rows match the filter.
Applications
WS303 applications
Smart Buildings
Plant rooms and risers detect leaks early to prevent water damage. D2D control can shut valves instantly even without a gateway nearby.
Data Centres
Server rooms guard sensitive equipment against leaks under floors and near cooling. The IP67 body suits demanding environments.
Hospitality
Hotels monitor bathrooms, kitchens and utility areas for leaks. Local buzzer alarms alert staff before damage spreads.
Homes & Offices
Homes and offices place compact sensors under sinks and appliances. LoRaWAN gives wide, low-power coverage with minimal wiring.
Questions
WS303 questions and answers
How is the WS303 powered?
~5.7 years (one hour leakage, according to the specification.
What ingress protection does the WS303 have?
IP67, according to the specification.
What is the operating temperature of the WS303?
–10 … +60 °C, according to the specification.
What lorawan does the WS303 provide?
CN470/IN865/RU864/EU868/US915/, according to the specification.
Request a quote
WS303 price and lead time
Tell us the quantity and the delivery country. We reply within one working day with the price, stock at the nearest warehouse and the dispatch date.
European headquarters+370 655 51654[email protected]
United Kingdom branch+44 7425 726932[email protected]
- Company code306755852
- VAT numberLT100017217417
- Official distributor
- 17+ years in IoT
- Installation support
Manufacturer warranty24 months
