Milesight EM300-ZLD Zone Leak Detection Sensor
Authorised Milesight UK Distributor£71.82 ex VAT (£86.18 inc. VAT)
EM300-ZLD is a LoRaWAN zone leak detection sensor. A 3 m sensing cable, customisable in length, detects conducting liquid anywhere along its run and alarms once the liquid reaches 5 mm depth, so it covers an area rather than a single point. It also reports temperature and humidity and runs several years on one 4000 mAh battery.
Sensing cable length3 m (customizable), alarm when liquid level reaches 5 mm
Need the gateway too? Build and price the whole kit →
In stock · typically dispatched within 14 working days from the UK
● Quotes answered within one working day · UK support
Delivery & assurance
- Ships from the UK
- £14.25 flat UK delivery
- Secure checkout — card, Klarna, invoice
- Manufacturer's warranty
Questions about this product? Call our UK team: 023 9223 3611
Description
EM300-ZLD is a compact zone leakage detection sensor for detecting large area presence of water (or other liquids) and transmitting alarm using LoRaWAN® technology.
With this low power consumption technology, EM300-ZLD can work up to 5 years with 4000 mAh battery. Combining with Milesight LoRaWAN® gateway and Milesight IoT Cloud solution, users can manage all sensor data remotely and visually and receive alarms via mobile APP.
EM300-ZLD also integrates temperature and humidity sensors, which has a great use for applications such as pipe leakage monitoring, basement flooding, pump failure,etc.
• Features
• Detect the presence of liquids by a long cable and based on the conductive principle
• Embedded with temperature and humidity sensors for environment monitoring
• Ultra-wide-distance transmission up to line of sight of 10km
• IP67 UV-resistant and waterproof enclosure for harsh environment applications
• Built-in 4000 mAh replaceable battery and works for more than 5 years without replacement
• Store locally 3, 000 historical records and support retransmission to prevent data loss
• Support Milesight D2D protocol to enable ultra-low latency and direct control without gateways
• Equipped with NFC for easily
Measuring Range
Trigger Condition: When Liquid Level Reaches 5mm Temperature: -30°C ~ 70°C Humidity: 0% ~ 100% RH
Additional information
| Weight | 0.1 kg |
|---|
EM300-ZLD-868M specifications
| Detection method | Conductive principle via sensing cable |
|---|---|
| Liquid type | Conducting liquid |
| Trigger condition | When liquid level reaches 5 mm |
| Sensing cable | 3 m (customizable) |
| Temperature range | -30°C to +70°C, resolution 0.1°C |
| Temperature accuracy | ±0.3°C (0 to +70°C); ±0.6°C (-30 to 0°C) |
| Humidity range | 0% to 100% RH, resolution 0.5% RH |
| Humidity accuracy | ±3% (10~90% RH); ±5% below 10% and above 90% RH |
| Wireless technology | LoRaWAN®, Milesight D2D; 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 |
| LoRaWAN mode | OTAA/ABP Class A |
| Advanced features | Threshold alarm, Milesight D2D controller, data storage (2,800 entries), data retransmission, data retrievability |
| Configuration | NFC via mobile app, downlink |
| Power supply | 1 × 4000 mAh ER18505 Li-SOCl2 battery (8000 mAh version optional) |
| Battery life (10 min interval + 24 triggers/day) | Over 10 years (SF7, EU868 & US915); around 5.6 years (SF10, EU868) |
| Operating temperature | -30°C to +70°C |
| Relative humidity | 0% to 100% (non-condensing) |
| Ingress protection | IP67, UV-resistant enclosure |
| Dimensions | 105.6 × 85.3 × 27 mm (4.16 × 3.36 × 1.06 in) |
| Housing | Transceiver ABS + PC (flame retardant), white; sensing cable PE + steel wire, yellow & black |
| Installation | Transceiver: wall screw, 3M tape or cable tie. Cable: 3M tape or cable tie |
| Approvals | CE, FCC, ISED, RCM, Telec, ICASA; RoHS |
Specifications taken from the manufacturer datasheet.
Which version do I need?
The battery is offered as 4000 mAh as standard with an 8000 mAh version optional, and the sensing cable is 3 m as standard but customizable. The datasheet lists LoRaWAN bands CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4 without spelling out the part-number suffix; the -868M build is the EU868 unit used in the UK.
Typical applications for the EM300-ZLD-868M
- Pipe leakage monitoring
- Basement flood detection
- Pump failure detection
- Large-area water presence detection in plant rooms
- Temperature and humidity monitoring alongside leak detection
Buying guides for this product
Frequency band
Supplied on EU868, the LoRaWAN band used in the UK and across Europe. That is the default and you do not need to ask for it — the -868M in the part number is the EU868 build.
The same EM300-ZLD-868M unit also covers IN865 and RU864. Those bands share the 863–870 MHz radio with EU868, so one device can be set to any of them in its own configuration — no different part number needed.
CN470, US915, AU915, KR920 and AS923 are a different radio and therefore a different build. Milesight makes them and we can order them: tell us where the devices are being deployed and we will confirm the part number, price and lead time.
Not sure which band applies where? The Things Network publishes the LoRaWAN frequency plan for every country.
Complete the stack
Products that work with this one — connect it, power it, and get it online.
Which gateway do I need? Compare the Milesight range, from £98.76 →
-
Milesight UG63 Mini LoRaWAN® Gateway
UG63 Price range: £98.76 through £131.68 ex VAT (£118.51 – £158.02 inc. VAT)Select options This product has multiple variants. The options may be chosen on the product page -
Milesight UG56 Industrial LoRaWAN Gateway
UG56 Price range: £173.58 through £213.98 ex VAT (£208.30 – £256.78 inc. VAT)Select options This product has multiple variants. The options may be chosen on the product page -
Milesight Smart Building Occupancy Kit — Occupancy + Air Quality + Gateway
KIT-OCCUPANCY £531.21 ex VAT (£637.45 inc. VAT) -
Milesight SG50 Ultra Low Power Solar LoRaWAN® Gateway
SG50-868M Price range: £683.83 through £733.21 ex VAT (£820.60 – £879.85 inc. VAT)Select options This product has multiple variants. The options may be chosen on the product page
EM300-ZLD-868M — frequently asked questions
How long is the sensing cable?
3 m as standard, and the datasheet states the length is customizable. The cable detects along its whole run, which is what makes this a zone detector rather than a spot detector.
How much liquid triggers the alarm?
The alarm triggers when the liquid level reaches 5 mm. Detection works on the conductive principle, so it detects water and other conducting liquids.
Does it need a LoRaWAN gateway?
Yes for cloud reporting: it is a LoRaWAN Class A device (OTAA/ABP) for standard gateways and network servers. It also supports Milesight D2D, which gives ultra-low-latency direct control of another Milesight device without a gateway.
What battery does it use and how long does it last?
One replaceable 4000 mAh ER18505 Li-SOCl2 battery, with an 8000 mAh version optional. Milesight quotes over 10 years at SF7 (EU868 & US915) and around 5.6 years at SF10 on EU868, with a 10-minute interval and 24 triggers per day.
Will readings be lost if the gateway is down?
It stores 2,800 entries locally and supports data retransmission and data retrievability.
How does it mount and is it weatherproof?
The transceiver mounts by wall screw, 3M tape or cable tie, and the cable by 3M tape or cable tie. The enclosure is IP67 and UV-resistant, rated -30°C to +70°C.
How much does the Milesight EM300-ZLD Zone Leak Detection Sensor cost in the UK?
The Milesight EM300-ZLD Zone Leak Detection Sensor is £71.82 ex VAT from Indiott, a UK distributor. The price is published rather than quote-only, and we invoice with VAT (PSI Technologies Ltd, VAT GB 730 2340 83). UK delivery is a flat £14.25 per order ex VAT, whatever the weight.
What is the lead time and delivery cost for the Milesight EM300-ZLD Zone Leak Detection Sensor?
The Milesight EM300-ZLD Zone Leak Detection Sensor is in stock and typically dispatched within 14 working days from the UK. UK delivery is a flat £14.25 per order ex VAT, whatever the weight or how many items you order. We ship to GB and the EU and provide a VAT invoice with every order.
Related products
-
Milesight EM400-TLD ToF Laser Distance Sensor
EM400-TLD Price range: £86.79 through £101.75 ex VAT (£104.15 – £122.10 inc. VAT)Select options This product has multiple variants. The options may be chosen on the product page -
-
Milesight CT303 / CT305 / CT310 Smart Current Transformer
Price range: £101.75 through £246.90 ex VAT (£122.10 – £296.28 inc. VAT)Select options This product has multiple variants. The options may be chosen on the product page -
Milesight EM400-UDL Ultrasonic Distance/Level Sensor
EM400-UDL-868M Price range: £194.52 through £366.60 ex VAT (£233.42 – £439.92 inc. VAT)Select options This product has multiple variants. The options may be chosen on the product page