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/RS485

Power Supply: DC28~42V

Description

Wet-type direct-reading remote water meter (hereinafter referred to as WDR water meter) is Hanwei’s self-developed direct-reading remote water meter that 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 meter, effectively avoiding the door-to-door meter reading by the water company/bureau.

WDR water meter also has a valve control function (optional), which is convenient for the water company/bureau to control the water consumption of the direct-reading remote water meter, making remote meter reading and control more convenient and reliable, while saving manpower, material and financial resources. , effectively increasing productivity.

Features

Adopt direct reading patented technology to realize digital remote transmission of data.

Infrared radiation mode is adopted to enhance the anti-interference ability.

Fully sealed waterproof treatment, protection grade IP68.

Housing material can be ductile iron, cast copper or stainless steel.

With low power consumption design, power supply is only required for meter reading.

Use Mbus/RS485 bus to communicate, and cooperate with the self-developed meter reading system to realize meter reading automation.

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