Brief Introduction
Accuracy: | ±0.5% of measured value | Pipe Size: | 25mm~5000 mm (1″~200″) |
Output: | RS485, 4-20mA, OCT, Relay | Medium Temperature: | -40℃~80℃ |
Product Introduction
The D118 Ultrasonic Flowmeter is a high-performance time-difference liquid flowmeter, integrated with ARM chips and low-voltage wide-pulse transmission tech. It’s ideal for continuous measurement of homogeneous liquids (without high-concentration suspended particles/gases) in industrial scenarios, delivering 0.5% accuracy under standard conditions and 0.1% repeatability.
Featuring a user-friendly window-based interface, it supports easy parameter setup and metric/imperial unit switching. It has TF card storage (≥1000 days of data), RS485 communication (MODBUS protocol), and multiple outputs (4-20mA, pulse, relay). With IP65/IP68-rated durable design, it’s widely used in water supply, petroleum, chemical, food, and pharmaceutical industries.
Product Applications

l Municipal Engineering
l Industrial water monitoring, commercial water supply metering
l Water and wastewater management
l HVAC (Heating, Ventilation, and Air Conditioning) systems
l Process industries (chemical, pharmaceutical, food and beverage)
l Energy management and environmental monitoring
l Agriculture and irrigation systems
l Research and development
l Facilities management
l Industrial maintenance and troubleshooting
l Carbon footprint, carbon audit, carbon assessment, carbon neutrality, and carbon trading etc.
Product Parameter
1) Technical Parameters
Performance specifications | |
Measurable Flow Velocity Range | ±0.01m/s~±12 m/s (±0.03 ft/s~±40 ft/s) |
Accuracy | 0.5% (0.5~5m/s standard condition) |
Repeatability | 0.1% |
Pipe Size Range | Clamp-on type: 25mm~5000 mm (1″~200″) Insertion type: 50mm~5000 mm (2″~200″) |
Function specifications | |
Output | Analog output: 4~20mA, maximum load 750Ω Pulse output: 0~9999Hz, OCT output (maximum and minimum frequencies adjustable) Relay output: max. frequency 1Hz ( 1A@125VAC or 2A@30VDC ) |
Communication | RS485, available to MODBUS protocol |
TFCard | Storage period: More than 1000 days Storage interval: 1~3600 seconds |
Power Supply | 90~245VAC(48~63Hz)or 10~36VDC |
Keyboard | 24-key touch keyboard |
Display Screen | 3.71-inch TFT color screen |
Temperature | Transmitter ambient temperature: -10℃~50℃ Sensor medium temperature: -40℃~80℃ (standard) |
Humidity | Up to 99% RH, non-condensing. |
Physical specifications | |
Transmitter | Die-cast aluminum chassis, IP rating: IP65 |
Transducer/Sensor | Sealed design, IP rating: IP68 Standard cable length: 9m, can be extended to 305m |
Weight | Transmitter: Approximately 2.2kg Clamp-on sensor: Approximately 2kg per pair Insertion sensor: Approximately 4kg per pair |
2) Body Parameters

3) Appearance

6) Installation



FAQ
Q: What outputs does D118 offer?
A: 4-20mA, pulse and relay outputs.
Q: What’s D118’s accuracy under standard conditions?
A: It has 0.5% accuracy under standard conditions.
Q: Does D118 support MODBUS protocol?
A: Yes, it supports RS485 with MODBUS protocol.
Q: How long can D118 store data via TF card?
A: It can store data for over 1000 days.
Q: What IP rating does D118 have?
A: Its transmitter is IP65, sensor IP68.