“Sandwich”-type (wafer) ultrasonic water meter, DN100 series (as indicated on the packaging)
Judging by the markings and appearance, this is an industrial device intended for water supply systems, irrigation, or water resource monitoring.
Here are the main technical parameters for this model:
Main characteristics (DN100)
Nominal diameter (DN): 100 mm.
Measurement method: Ultrasonic (signal transit time difference)
Accuracy class: Class 2 (ISO 4064)
Working pressure: Up to 1.6 MPa (16 bar)
Water temperature range: 0.1 — 30 °C (cold water)
Protection class: IP68 (fully dustproof and waterproof, can operate when submerged)
Body thickness (Sandwich): About 50.8 mm (ultra-thin design to save space)
Electrical parameters and interfaces
Power supply: Built-in lithium battery (3.6 V), with a service life usually of 10–15 years. External DC 8–24 V power supply is also possible.
Display: Two-line LCD screen:
Top line: Instant flow rate (m^3/h)
Bottom line: Total volume (m^3)
Communication interfaces (depending on configuration):
RS485 (Modbus protocol)
M-BUS.
NB-IoT / GSM (wireless data transmission)
Pulse output (OCT)
Flow characteristics (typical for DN100)
Nominal flow (Q_3): About 100 m^3/h.
Maximum flow (Q_4): About 125 m^3/h.
Q_3/Q_1 ratio (R): Usually R=100 or R=125 (wide dynamic range)
Installation features
In photo 1000046789, there is an arrow on the body — it indicates the flow direction. For correct operation, straight pipe sections are recommended:
Before the meter: At least 10 times DN (1 meter)
After the meter: At least 5 times DN (0.5 meter)
This device has no moving parts, which makes it resistant to impurities in the water and ensures no pressure loss.