P118i Ultrasonic Flowmeter
Portable Ultrasonic Flowmeter and Analyzer — P118i (HD)
Applications and measurement
Portable transit-time measurement, on-site flowmeter calibration and periodic liquid-flow inspection. Designed for homogeneous liquids; liquids with high concentrations of suspended particles or gases are excluded.
Applications include tap water, wastewater treatment, seawater desalination, industrial process and cooling water, aquaculture, RAS, HVAC and agricultural irrigation. Clamp-on measurement supports on-site checks of toxic or highly corrosive media and overhead pipelines without inserting a sensor into the liquid.
About P118i
The compact P118i (HD) combines an ARM processor, low-voltage wide-pulse transmission and a 32-bit digital processing program. Its timing circuit provides 0.04 ns resolution. Magnetic clamp-on transducers attach to pipes with magnetic properties; pipe straps are included in the standard equipment.
- Intelligent adaptive signal processing without circuit adjustment.
- Low-voltage operation, low power consumption and strong interference resistance.
- Simultaneous seven-digit positive, negative and net flow totalizers with scaling.
- Rechargeable battery and portable equipment for temporary measurements and data collection.
Application and Installation Guidance
Liquid and pipe suitability
Use homogeneous liquids and avoid high concentrations of suspended particles or gases. Select the transducer for the published pipe and temperature range; the PH020 high-temperature option has a smaller maximum pipe size.
Measurement location
Avoid the 6 o’clock and 12 o’clock pipe positions, where sediment or bubbles can attenuate the signal. Select pipe sections without internal scaling where possible; if unavoidable, account for the scaling as a lining in the meter setup.
Follow the straight-run lengths and V/Z installation arrangements in the source drawings.
Technical Data, Dimensions and Wiring
Performance
- Flow velocity
- ±0.01–±12 m/s
- Accuracy
- ±0.5% of measured value at 0.5–5 m/s
- Repeatability
- 0.1%
- Pipe range
- P010: 25–5000 mm; PH020: 25–1200 mm
- Timing resolution
- 0.04 ns
Functions and transmitter
- Analog output
- 4–20 mA; maximum load 750 Ω
- Pulse output
- 0–9999 Hz, OCT output
- Relay output
- Maximum frequency 1 Hz
- Communication
- RS485 interface
- Power
- 10.8 V rechargeable lithium battery; 10 hours continuous operation after a full charge
- Keyboard
- Touch keys
- Display
- 3.5-inch IPS full-view colour screen; 480 × 640 (H × V, as published)
- Storage
- TF card: 16 GB, subject to supplied configuration; 180-day logging period; at least 1000 files with 1-second data intervals
- Protection
- Transmitter IP54; encapsulated transducer design IP68
- Transmitter weight
- 1 kg
- Transmitter dimensions
- 111 × 209 × 39 mm
P010 standard transducers
- Installation
- Magnetic clamp-on with aluminium-alloy guide rail
- Temperature
- −40 to +80°C
- Housing
- Aluminium alloy
- Humidity
- 0–99% relative humidity
- Cable
- Standard 5 m special twisted-pair cable
- Weight
- 0.9 kg per pair
- Guide rail dimensions
- 300 × 40 × 30 mm (source drawing)
PH020 high-temperature transducers
- Installation
- Magnetic clamp-on
- Temperature
- −40 to +150°C
- Housing
- Stainless steel
- Cable
- Standard 3 m
Cable extensions
- On request
- The datasheet allows 5 m extension increments up to 305 m. The selector uses standard cables; request extensions in Application and special requirements.
Connections
Transmitter and Transducer Dimensions — mm
Transducer Installation Methods
V method: 25–400 mm, on the same side of the pipe. Keep both sensors horizontally aligned, with their centre lines parallel to the pipe axis.
Z method: 100–5000 mm, on opposite sides; avoid the top and bottom of the pipe. The datasheet recommends Z installation for pipe sections of 300 mm and above. PH020 remains limited to its 25–1200 mm transducer range.
Measurement Site Selection
Minimum straight lengths (upstream / downstream): 90° bend 10D / 5D; tee 50D / 10D; diffuser 30D / 5D; reducer 10D / 5D; valve 30D / 10D; vertical installation 10D / 5D; pump 50D after the pump. D is pipe diameter.
On-site Measurement Examples
The catalogue illustrates cooling water, hot water, a 0.4 m pipeline and a 1.8 m pipeline. Select the appropriate transducer for the actual pipe size and temperature.
Standard Equipment
① Transmitter · ② Transducers · ④ Sensor cables · ⑤ Charger · ⑥ Coupling compound · ⑦ Pipe straps · ⑧ Toolbox · ⑨ Tape measure · ⑩ Card reader.
Build your P118i ordering code
Example — Standard Model: P118i-P010-005
Portable ultrasonic flowmeter and analyzer with P010 magnetic clamp-on transducers and standard 5 m cable.