Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS
Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS
Intrinsically Safe Modbus Ultrasonic Level Sensor - Image 3
Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS
Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS
Intrinsically Safe Modbus Ultrasonic Level Sensor - Image 6
Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS
Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS
Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS
Intrinsically Safe Modbus Ultrasonic Level Sensor - MNU IS

Intrinsically Safe Modbus Ultrasonic Level Sensor

MNU-IS

Modbus Measurements in Classified Locations

The MNU-IS Intrinsically Safe Modbus Ultrasonic Level Sensor offers precise, low-power level measurements in hazardous locations. Designed with rugged durability, it is suitable for use in Class 1, Division 1 hazardous locations and features optional Gas Discharge Tube Surge Protection. The sensor supports quick measurements, taking as little as 250 ms, and simplifies setup with easy wiring, daisy chain connectivity, and remote configuration via the internet. Ideal for water/wastewater, sewer/lift stations, and low-power remote applications.

  • Hazardous Location Safe: Intrinsically safe for hazardous locations
  • Seamless Integration: Modbus RTU output for easy integration
  • Fast & Reliable: Quick on-demand level measurement (250 ms)
  • Enhanced Protection: Gas Discharge Tube Surge Protection (optional)
  • Energy Efficient: Low-power operation for remote locations
  • Simplified Installation: Easy setup with daisy chain wiring
  • Internet Accessibility: Remote configuration via the internet

ⓘ
  • Frequency/Operating Range:
    • 69 kHz: 1–25 ft. (0.30–7.62 m)
    • 81 kHz: 5″–12 ft. (0.13–3.66 m)
  • Beam Pattern: 9º off axis
  • Internal Temperature Compensation: Yes
  • Accuracy: ±0.25% of detected range
  • Resolution: 0.1 in. (2.5 mm)
  • Response Time: Programmable
  • IP68 (3 meters submerged for 48 hours)
    • M12 connector only rated IP67
  • Operating Temp:
    • Standard: – 22º to 140ºF (-30º to 60ºC)
  • Interface with RS-485 Modbus RTU
  • APG Modbus Windows-compatible software can be provided to adjust internal parameters.
  • User selected Units of Measure, Response Rate, Volume Calculations, and more.
  • Supply Voltage: 8 – 24 VDC
  • Operating Current Draw:
    • 18 – 26 mA @ 24 VDC, Typical 18 mA
    • 32 – 63 mA @ 8 VDC, Typical 37 mA
  • Waiting Status Current Draw:
    • 13 mA @ 24 VDC
    • 17 mA @ 8 VDC
  • Wiring Connection: 4-conductor shielded, twisted-pair cable
  • Gas Discharge Tube Surge Protection
    • 150V, 1 kA
  • Output: Modbus RTU (RS-485)
  • Online Access/Control: Via APG’s Tank Cloud & RST-5003 or LOE controller
  • Upper Housing: PC/PBT blend
  • Transducer Face: PVDF
  • CSA/cCSAus Contract #237484
    • Intrinsically Safe
      • Class I, Div. 1, Groups C & D, T4
      • Class I, Zone 0, AEx ia IIB T4 Ga
      • Ex ia IIB T4 Ga
  • ATEX
    • II 1G Ex ia IIB T4 Ga
  • IECEx
    • Ex ia IIB T4 Ga
  • CE
What communication protocol does the MNU-IS sensor use?

The MNU-IS sensor uses RS-485 Modbus RTU, making it easy to integrate into existing monitoring and control systems.

The sensor supports quick on-demand level measurement in as little as 250 milliseconds, allowing for near-instantaneous readings when needed.

Yes. The sensor operates on low power (18-26 mA @ 24 VDC, typical 18 mA), making it ideal for remote installations, including water/wastewater facilities, sewer and lift stations, and other off-grid applications.

The sensor is available in two range options:

  • 1 to 25 feet
  • 5 inches to 12 feet

The MNU-IS provides high-precision measurements with an accuracy of ±0.25% of the detected range.

The Gas Discharge Tube (GDT) Surge Protection option helps protect the sensor from voltage spikes and surges, increasing durability in electrically noisy environments.

The sensor operates on 8-24 VDC, offering flexibility for different power supply configurations.

Yes! The MNU-IS supports remote configuration via the internet, allowing for easy adjustments without needing to be physically on-site.

The MNU-IS is ideal for hazardous environments and remote applications, including:

  • Water and wastewater facilities
  • Sewer and lift stations
  • Industrial tank monitoring
  • Oil and gas applications
  • Chemical processing plants

The MNU-IS sensor supports RS-485 daisy chain connectivity, enabling multiple sensors to be connected in sequence, reducing wiring complexity and installation costs.

OUTPUT

Modbus, Remote Monitoring
MOUNT

2", 3/4"
RANGE

1' – 15', 1' – 25', 5" – 12'
CERTIFICATION

CSA – General, Intrinsically Safe
INDUSTRY

Chemical, Food & Beverage, Industrial Automation, Marine, Oil & Gas, Water & Wastewater
ENCLOSURE PROTECTION

IP68

WARRANTY

APG warrants its products to be free from defects in material and workmanship under normal use and service of the product for 24 months from the date of shipment from APG, unless otherwise specified by APG in writing. Read our full warranty policy HERE.

RETURNS

Returns and allowances must be authorized by APG in advance, which authorization may be granted or withheld by APG in APG’s sole and absolute discretion. Read our full return policy HERE.

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