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SonoMeter 31 Energy Meter

Brand: Danfoss

The Danfoss SonoMeter 31 is a range of ultrasonic, compact energy meters intended for measuring energy consumption in heating and cooling applications for billing purposes. 

The meters are designed for remote meter read-out (AMR). 

SonoMeter 31 energy meters consist of an ultrasonic flow sensor, a pair of Pt500 temperature sensors and a calculator with integrated circuits for temperature measurement, flow calculation and energy calculation.
Features
  • Available in nominal flow rates qp 25, 40 and 60 m³/hr
  • DN65, DN80 and DN100 housings with flange connections
  • MID approval for ultrasonic energy meter with dynamic range of 1:100 (qi:qp) in class 2
  • Optional MID approved dynamic range of 1:250 (qi:qp) in class 2
  • Temperature range 50176 to 130° C
  • Short overload temperature up to 150° C
  • Operating pressure 25 bar as standard
  • For 2 or 4 wire temperature sensors
  • Glycol mixtures as option (not MID certified)
  • Calculator with IP65 protection class as standard
  • Flow sensor with IP65 protection class as standard (IP67 for combine heating and cooling applications)
  • Return or supply pipe installation, for vertical or horizontal mounting
  • Battery lifetime for at least 10 years
  • Insensitive to dirt
  • Remote reading via wired M-Bus, radio OMS 868
  • MHz, RS-485 Modbus RTU, pulse output, analog output and optical interface
  • Two pulse inputs as standard (passive or active)
  • Special option with 2 flow sensors, 2 pressure sensors and 3 temperature sensors measurement

Specifications

Brand

Ambient Temperature Range

  • Calculator: 5° to 55° C (41° to 131° F)
  • Flow Sensor: -30° to 55° C (-22° to 131° F)

Approvals & Certifications

  • CE
  • MID
  • EN 13757-3
  • EN 13757-4
  • EN 1434 Class 2 & Class C

Battery Life

  • Minimum 10-Years (Including AMR Communication)

Cable Length

  • 10 feet (3 metres) - Flow Sensor, Temperature Sensor Cable

Communication

  • Baud Rate: 1,200, 2,400, 4,800, 9,600 (Default), 38,400, 56,000, 57,600, 1,15,200 (Modbus RS-485 Module)
  • Baud Rate: 300, 1,200, 2,400 (Default), 4,800, 9,600 (Wired M-Bus Interface)
  • Data Logging
  • Optical Interface
  • Radio OMS 868 MHz
  • RS-485
  • Wired M-Bus Interface
  • Wireless M-Bus Protocol According to EN 13757-4

Connection Style

  • Flange

Consumption

  • Maximum

Control Functions Characteristics

  • Heating/Cooling PID

Current

  • Current Drawn: (1.5 mA) One M-Bus Load
  • Typical Supply Current: 50 mA - Modbus RS-485 Module

Display

  • 8-Digit LCD

Electrical Protection

  • Polarity
  • Reverse Polarity

Environmental Protection

  • IP65 - Calculator & Flow Sensor
  • IP67 - Heat & Cooling Meter

Flange Size - 2-1/2” (DN 65)

  • 2-1/2” (DN 65) - PN 16
  • 2-1/2” (DN 65) - PN 25

Flange Size - 3” (DN 80)

  • Unrated

Flange Size - 4” (DN 100)

  • Unrated

Flow Rate

  • 0.10 to 0.24 m³/hour - Starting
  • 0.25 to 0.6 m³/hour - Standard Min.
  • Maximum
  • Nominal 25 to 60 m³/hour

Frequency

  • 5 Hz - Max.

Humidity

  • 93 % Relative Humidity

Length

  • 11.8” (300 mm) - DN 65
  • 13.8” (350 mm) - DN 80 & DN 100

Maximum Voltage

  • 3.6 V - Max.
  • 50 Vdc - Wired M-Bus

Media

  • Glycol Mixtures
  • Water Quality with PH 7 to 9.5

Mounting

  • Horizontal or Vertical

Operating Pressure

  • psi: 362.3 (kPa: 2,500, bar: 25) - Max.

Operating Temperature

  • -30° to 55° C (-22° to 131° F) - Flow Sensor
  • 5° to 55° (41° to 131° F) - Calculator

Operating Temperature - Sensor

  • 0° to 150° C (32° to 302° F)

Power Requirement

  • 3.6 Vdc Lithium Battery

Rotation

  • Minimum 45°

Sensor / Probe Material

  • Brass
  • Stainless Steel

Sensor / Probe Type

  • Pt500 Ø 5.2 mm with 2-Wire Leads - Temperature Sensors

Storage Temperature

  • 5° to 55° (41° to 131° F)

Supply Voltage

  • 12-24 Vac/dc - Modbus RS-485 Module
  • Mains Supply 230 Vac

Temperature Range

  • 0° to 180° C (32° to 356° F)

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