Measurement Principle

Ultrasonic Time-of-Flight (TOF) Method

Medium

Gas

Number of Paths

1 or 2 paths

Path Configuration

Parallel Transmit-Receive

Flow Velocity Range

0.03–30 m/s (customizable for higher velocities)

Resolution

0.001 m/s

Sampling Interval

≤0.1 s

Accuracy

Class 1.0

Repeatability

0.2% (Qt–Qmax); 0.1% customizable

Overload Capacity

≥120% Qmax (no impact for short-term)

Pipe Diameter

DN50–DN500 (larger sizes customizable)

Nominal Pressure

PN16, PN40, PN63; Class150, Class300, Class600, Class900, Class1500

Medium Pressure

0–42.0 MPa

Ambient Temperature

-30–60°C (more special working conditions available on request)

Transmitter

Aluminum alloy, 304, 316 stainless steel (customizable)

Transducer

Full metal (316 stainless steel, titanium alloy)

Power Consumption

<4W

Transducer Frequency

120KHz, 160KHz, 200KHz, 250KHz (select based on working conditions)

Analog Input

3 channels of 4-20mA for temperature and pressure transmitter signals

Analog Output

2 channels of 4-20mA (1 channel supports HART protocol)

Frequency/Pulse Output

2 channels × 3V/5V or Open Collector (OC)

Communication Interface

2 × RS485 (optional: 3 × RS485, 1 × RS232, or Ethernet)

Communication Protocol

Standard MODBUS protocol

Digital Output

3 × DO (Digital Output) for alarms and status signals

Relay Output

1 × relay output

LCD Display

On-site display of instantaneous flow (under standard conditions), cumulative flow, and real-time temperature/pressure measurements

Data Storage Time

Historical data can be stored for at least 8 years (annual and monthly accumulated data), alarm records can be stored for at least 10 years

Operation

Configuration via dedicated host software (PC-based)

Diagnostic Function

Built-in self-diagnostic system, allowing diagnostics and alarm outputs for the instrument’s operational and fault status

Explosion Protection Level

ExdIIBT6 Gb, ExdIICT6 Gb (Customizable)

Protection Level

IP66, IP68 (Buried type)