The Precisionist in Measurement
Milesight EM41x-RDL is a pioneering device designed to offer real-time monitoring of liquid levels in a wide range of scenarios. The device is equipped with millimeter wave radar that enables enhanced transmission frequency and penetration ability, tailored for sewers, canals, factories, liquid tanks, and more.
Built to withstand explosive atmospheres, the EM411-RDL integrates ATEX Zone 0 certification with a chemical-resistant PVDF housing and robust IP68 rating. This durable design ensures accurate monitoring and maintenance-free operation even in aggressive conditions, effectively eliminating ignition risks to comprehensively safeguard personnel and critical assets.
*ATEX certification is available on the EM411-RDL model only.
Aside from its extensive measurement distance, radar technology is also capable of measuring through objects, including plastics, plants, and are less sensitive to snow, dirt, dust, steam and more, making it suitable for a wider range of applications.
With enhanced transmission frequency and penetration
Narrow 8o emission angle for precise targeted position measurement
Dust tight and waterproof
Monitor radar echo curves in real time
Battery life of up to 7 years
Allows remote configuration for hard-to-reach locations
LoRaWAN® version and Cat. 1 version available
Up to 12m of detection distance for wide application scenarios
Application Scenario Mode
A choice of standarard, rainwater well, sewage well, and storage tank mode for easy scenario setup.
Built-in Tilt Sensor
Allows level measurement at a tilted angle and send timely alerts when the device has been accidentally dislocated.
Flexible Thread Options
Featuring both NPT and G thread options, the device ensures seamless compatibility across all global markets, including North America.
STANDARD
RAINWATER WELL
SEWAGE WELL
Storage Tank Mode
Experience unparalleled control and instantly receive notifications the moment the liquid level in your tank hits a preset threshold or detects a sudden rise.
* Only available for Storage Tank Mode
Sewer/Manhole
Canal
Factory
Liquid Tank
| Measurement | |
|---|---|
| Distance | |
| Technology | Millimeter Wave Radar |
| Target | Liquids or Smooth Surface Solid |
| Radar Frequency Band | 60GHz |
| Detection Angle | 8° |
| Detection Distance | 0.3m ~ 12m |
| Accuracy | Up to ± 2mm1 Up to ± 5mm2 |
| Resolution | 1mm |
| Device Position | |
| Status | Normal/Tilt |
| Wireless Transmission | |
| Frequency | CN470/IN865/EU868/RU864/US915/AU915/KR920/AS923-1&2&3&4 |
| Tx Power | 16 dBm (868 MHz)/20 dBm (915MHz)/19 dBm (470MHz) |
| Sensitivity | -137dBm @300bps |
| Mode | OTAA/ABP Class A |
| SIM Slot | / |
| Application Mode | / |
| Antenna | Internal Antenna or External Antenna (Hardware Optional) External Antenna (EA) Version: 1 × 50 Ω SMB Male Connector |
| Others | |
| LED Indicator | 1 × LED indicator (Internal) |
| Configuration | Mobile App via NFC or Bluetooth, Downlink |
| Advanced Feature | Distance Threshold Alarm, Distance Change Alarm, Blind Zone Alarm, Radar-echo Curve, Diagnostic, Data Storage (2,000 entries), Data Retrievability (LoRaWAN® Version), Data Retransmission |
| Physical Characteristics | |
| Power Supply | 1 × 19000 mAh ER34615 Li-SOCL2 Battery |
| Battery Life3 | Around 7 Years |
| (15-min collection Interval+1440-report interval, 25°C) | |
| Operating Temperature | -20°C ~ 60°C |
| Relative Humidity | 0 ~ 100% (non-condensing) |
| Ingress Protection | IP68 (1m underwater, 48 hours), ATEX (Zone0) |
| Dimension | Ф 101 × 87 mm (Ф 3.98 × 3.43 in) |
| Weight | 400g |
| Housing&Color | PVDF (UL94 V0), Blue + Grey |
| Supported Tank Thread | G 1½” or NPT 1½” (Hardware Optional) |
| Installation | Wall Bracket Mounting, Tank Threaded Installation |
| Approvals | |
| Regulatory | CE, FCC, ATEX (Zone0) |
| Environmental | RoHS |
1 Perfectly smooth flat-surfaced solid, or still liquid surface.
2 Relatively smooth flat-surfaced surface or stable liquid surface.
3 The battery life based on test results under laboratory conditions using the standard battery provided by Milesight. Actual performance may vary depending on battery brand and environmental factors.
| Measurement | |
|---|---|
| Distance | |
| Technology | Millimeter Wave Radar |
| Target | Liquids or Smooth Surface Solid |
| Radar Frequency Band | 60GHz |
| Detection Angle | 8° |
| Detection Distance | 0.3m ~ 12m |
| Accuracy | Up to ± 2mm1 Up to ± 5mm2 |
| Resolution | 1mm |
| Device Position | |
| Status | Normal/Tilt |
| Wireless Transmission | |
| Frequency | CN470/IN865/EU868/RU864/US915/AU915/KR920/AS923-1&2&3&4 |
| Tx Power | 16 dBm (868 MHz)/20 dBm (915MHz)/19 dBm (470MHz) |
| Sensitivity | -137dBm @300bps |
| Mode | OTAA/ABP Class A |
| SIM Slot | / |
| Application Mode | / |
| Antenna | Internal Antenna or External Antenna (Hardware Optional) External Antenna (EA) Version: 1 × 50 Ω SMB Male Connector |
| Others | |
| LED Indicator | 1 × LED indicator (Internal) |
| Configuration | Mobile App via NFC or Bluetooth, Downlink |
| Advanced Feature | Distance Threshold Alarm, Distance Change Alarm, Blind Zone Alarm, Radar-echo Curve, Diagnostic, Data Storage (2,000 entries), Data Retrievability (LoRaWAN® Version), Data Retransmission |
| Physical Characteristics | |
| Power Supply | 1 × 19000 mAh ER34615 Li-SOCL2 Battery |
| Battery Life3 | Around 7 Years |
| (15-min collection Interval+1440-report interval, 25°C) | |
| Operating Temperature | -40°C ~ 70°C |
| Relative Humidity | 0 ~ 100% (non-condensing) |
| Ingress Protection | IP68 (1m underwater, 48 hours) |
| Dimension | Ф 101 × 87 mm (Ф 3.98 × 3.43 in) |
| Weight | 400g |
| Housing&Color | PVDF (UL94 V0), Blue + Grey |
| Supported Tank Thread | G 1½” or NPT 1½” (Hardware Optional) |
| Installation | Wall Bracket Mounting, Tank Threaded Installation |
| Approvals | |
| Regulatory | CE, FCC |
| Environmental | RoHS |
1 Perfectly smooth flat-surfaced solid, or still liquid surface.
2 Relatively smooth flat-surfaced surface or stable liquid surface.
3 The battery life based on test results under laboratory conditions using the standard battery provided by Milesight. Actual performance may vary depending on battery brand and environmental factors.
| Measurement | |
|---|---|
| Distance | |
| Technology | Millimeter Wave Radar |
| Target | Liquids or Smooth Surface Solid |
| Radar Frequency Band | 60GHz |
| Detection Angle | 8° |
| Detection Distance | 0.3m ~ 12m |
| Accuracy | Up to ± 2mm1 Up to ± 5mm2 |
| Resolution | 1mm |
| Device Position | |
| Status | Normal/Tilt |
| Wireless Transmission | |
| Frequency | LTE (CAT 1): B1/B3/B5/B7/B8/B20/B28 for EMEA/Australia/New Zealand |
| SIM Slot | 1 x Nano SIM (4FF) Slot, 1.8V/3V |
| Application Mode | TCP/UDP/MQTT/ AWS/Milesight Development Platform |
| Antenna | Internal Antenna or External Antenna (Hardware Optional) External Antenna (EA) Version: 1 × 50 Ω SMB Male Connector |
| Others | |
| LED Indicator | 1 × LED indicator (Internal) |
| Configuration | Mobile App via NFC or Bluetooth, Downlink |
| Advanced Feature | Distance Threshold Alarm, Distance Change Alarm, Blind Zone Alarm, Radar-echo Curve, Diagnostic, Data Storage (2,000 entries), Data Retrievability (LoRaWAN® Version), Data Retransmission |
| Physical Characteristics | |
| Power Supply | 1 × 19000 mAh ER34615 Li-SOCL2 Battery |
| Battery Life3 | Around 5 Years |
| (15-min collection Interval+1440-report interval, 25°C) | |
| Operating Temperature | -35°C ~ 70°C |
| Relative Humidity | 0 ~ 100% (non-condensing) |
| Ingress Protection | IP68 (1m underwater, 48 hours) |
| Dimension | Ф 101 × 87 mm (Ф 3.98 × 3.43 in) |
| Weight | 400g |
| Housing&Color | PVDF (UL94 V0), Blue + Grey |
| Supported Tank Thread | G 1½” or NPT 1½” (Hardware Optional) |
| Installation | Wall Bracket Mounting, Tank Threaded Installation |
| Approvals | |
| Regulatory | CE |
| Environmental | RoHS |
1 Perfectly smooth flat-surfaced solid, or still liquid surface.
2 Relatively smooth flat-surfaced surface or stable liquid surface.
3 The battery life based on test results under laboratory conditions using the standard battery provided by Milesight. Actual performance may vary depending on battery brand and environmental factors.
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