Details

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Material: Ductile iron and cast copper

Accuracy:
Maximum allowable error @ Q1~Q2: ±5%.
Maximum allowable error @ Q3-Q4: water temperature 0.1~30℃, max permissible error: ± 2%; water temperature >30℃, max permissible error ± 3%.

Sensor type: Photoelectricity direct reading type

Communication type: Mbus

Power Supply: DC21 -42V

Description

Dry-Type Direct Reading Water Meter ( DDR water meter) is Hanwei self-developed DDR water meter. It is convenient for remote meter reading and control for the actual needs of daily water consumption.

It adopts M-BUS∕RS485 bus mode communication to realize the remote direct reading of the water qty consumed. It can effectively avoid the door-to-door meter reading by the water company/bureau.

This product also has an optional valve control function, it enable water company/bureau to control the water consumption by DDR water meter, making remote meter reading and control more convenient and reliable. It can greatly save manpower & cost, improve productivity.

Features

Adopts direct reading on the meter dial wheel.

No need to set parameters

No cumulative reading error.

Adopt low power consumption design, only consume power when reading.

Advanced data encoding and verification methods, secured and reliable communication .

Can be integrated into water management platform system, realize automation in water meter reading and water management.

No interference from reading device on the primary water meter.

Each meter has a unique address code, Mbus connection, simple wiring.

The surface of the water meter is permanently clear.

The shell is made of Ductile iron and cast copper.

Application

Residential & Commercial buildings

Old community renovations

Schools, urban and rural water supply

Urban road greening water

Farmland irrigation etc.

Specifications

Mechanical part
Parameter	unit	Value
Nominal diameter (DN)	mm	15	20
Minimum flow (Q 1 )	m3/h	0.025	0.04
Boundary Flow (Q 2 )	m3/h	0.04	0.06
Common flow (Q 3 )	m3/h	2.5	4
Overload flow (Q 4 )	m3/h	3.125	5
Q 3 /Q 1 (R)	100
pressure loss	0.063MPa
Pressure Level	MAP10, normal ≤ 1.0MPa, short time ≤ 1.6MPa
water temperature	Temperature: 0.1～+45℃ ( cold water )
Electrical part
Working Power	DC2 1 -42V (MBUS interface)
Working Current	Static current: <1.2mA , instantaneous working current for meter reading: <12mA
Ambient Temperature	Temperature: -20 ℃～+45℃ , Humidity: 0～ 100 %RH
Degree Of Protection	IP68
Valve Function	optional
Way Of Communication	Wired M-BUS bus communication or wired RS485 communication
Communication Transmission Rate	1200/2400/4800/9600bps optional
Communication Distance	≤300m
Letter Of Agreement	" 188 Communication Protocol" or ModBus protocol , and the protocol can be customized
Protection Mechanism	Bus open circuit protection , short circuit protection , overvoltage protection, overcurrent protection