For Fuel Gas Management

Ultrasonic Flowmeter
Developed jointly by Tokyo Gas Co., Ltd. and our company

WIDE

Absoluteaccuracy

Wide operationrange

Energy loss
“0”

Selectable power
supply options

Available foroutdoor use

For energy managementin the carbon neutral era

Due to social trends surrounding carbon neutrality, the importance of energy management is increasing.
Under these circumstances, there is a need to steadily improve the efficiency of energy management.

Absolute accuracy“guaranteed”
POINT 1

Difference between absolute accuracy
and repeatability

ACCURARY±�%RD

Absolute accuracy is a measurement notation thatindicates how much it is equal to the true value.

It allows you to accurately understand the energy consumption rate and is useful for calculating CO� emissions

Wide range “ �：��� ”

Error with the true
value is not known±�.�%F.S.

±�%RD

Measurement
center value

Repeatability±�.�%F.S.

per calorific value and product carbon footprint.

POINT 2

True value

Absolute accuracy

WIDE

The flow meter measures gas consumption from low
combustion to rated flow, supporting accurate energy
management. In addition, depending on the application,

multiple burner management can be covered by one
flowmeter, contributing to cost and installation space.

Qmin

Qmax

Energy loss “�”POINT 3

There are no moving parts or structures that

obstruct the flow in the measurement tube, so
no energy is wasted.

In addition, it can accurately measure from low
pressure to rated pressure.

Accurate measurement is possible
even at low flow rates

Gas
Flow rate range
UW���
UW���
UW��
�POINT 4

��~����m�/h�~���m�/h�.�~���m�/h�������������������� m�/hSelectable power supply (exclusive lithium battery, ���VAC, ��VDC)
With low power consumption design, battery-powered models are also available.
They can be replaced on-site, contributing to CO� reduction.

POINT 5

Outdoor installation is possible*Compliant with protection structure IP�� (JIS C����).

Flow rate m �/h*To avoid direct sunlight, installing asunshade is recommended.

For energy management and fuel efficiency monitoringand management in various combustion equipment
Cogeneration system

Ultrasonic ﬂow meterfor fuel gas management

Gas

Large boilers

Water

Electromagnetic
ﬂowmeterElectromagnetic
ﬂowmeterSteamNatural chiller

Generation

Electromagnetic
ﬂowmeter

Exhaust Heat Boiler

Electromagnetic
ﬂowmeterGas engine

Gas

Water

Exhaust heatrecovery (Gas)

Steam

Ultrasonic ﬂow meterfor fuel gas management

Water

Water

Steam boiler

Cooling tower

Management of energy consumption by plant building

Large combustion furnace
Ultrasonic ﬂow meter
for air

Ultrasonic ﬂow meterfor fuel gas management

Gas

Ultrasonic ﬂow meterfor fuel gas management

Gas

Air

Electromagnetic
ﬂowmeter

Water
Combustion
furnace

Cooling
furnace

Factory

Normal flow rate conversion table 〈Example〉at temperature of �°C and � atmospheric pressureActual ﬂow rate(m�/h)Model�.�

UW��

�.�

Pressure（kPa）
����.�

�����.�

�����.�

������

��.�

��.�

������

���

���

���

�,���

�,���

�,���

�,���

������

���

���

���

���

�,���

�,���

�,���

�,���

�,���

�,���

�,���

�,���

��,���

�,���

�.�

�.�

�.�

��.�

UW���

�.�

�.�

�.�

�����
�.�

UW���

����

Unit：Nm�/h��.�

��.�

��.�

�,���

�,���

�,���

�.�

��.�

�,���

�.�

��.�

��.�
��.�

��.�
��.�

��.�

��.�

���.�

��.�

External dimension

Unit：ｍｍHUW���/������������

ModelUW���������������

���

UW��UW���LL���
���

H���
���

Specifications of Ultrasonic Flow Meter UW for Fuel Gas Management
ModelUW��

Gas type *1

Flow rate range (Actual ﬂow rate)

UW���

���A

���A

Natural gas（��A・��A），Nitrogen�.� ～ ��� m�/h

� ～ ��� m�/h�� ～ ���� m�/h�.�

�.�

Type without pressure sensor: �Mpa

Maximum working pressure
Low ﬂow cutoﬀUW�����A

Nominal diameter

�.�

Type with pressure sensor: ���kPa / �Mpa

Accuracy±�%RD（for a range of ��% to ���% of the max ﬂow rate）,±�.�%FS（for a range of minimum ﬂow rate to ��% of the max ﬂow rate）（Normal / Standard）

Type without pressure sensor: Simple conversion by the pressure value of manual setting

Temperature and pressure compensation

exclusive lithium battery（life = � years @��°C and ��%RH）

Battery

Power /Consumption*2

���VAC±��% / max ��W (for ��mA)

AC power

��VDC±��% / max �W (for ��.�V and ��mA)

DC powerUpdate interval

Main display

Display

Sub display
Analogue

OutputType with pressure sensor: ±�.�%RD（@ ��� kPa or �MPa, ��°C)

Common spciﬁcation
Output�Output�

Communication *3

Fluid temperature and humidity

Ambient working temperature and humidity

Battery-powered: � seconds

���A / ���A : actual ﬂow rate: ��-digit integer / converted ﬂow rate: ��-digital integer

Trip accumulated ﬂow volume ��A : actual ﬂow rate : �-digit integer + one decimal places / converted ﬂow rate : �-digital integer
���A / ���A : actual ﬂow rate: �-digit integer / converted ﬂow rate: �-digital integer

Alarm indication (for ultrasonic sensor, temperature sensor, pressure sensor, external memory and battery voltage (for battery powered only))
Instantaneous ﬂow rate: � digits

Compatible standards
Masspressure: � digits

choose among options of Instantaneous ﬂow rate, temperature and pressure (default = instantaneous ﬂow rate)
Nch open-drain output (maximum load ��VDC, ��mA / Lo:�.�V or less)Accumulated ﬂow volume pulse (standard) : ����L/P (choose : ���,����,�����L/P)

Duty: �� ～ ��%

Alarms External powered type (standard): upper & lower limits (choose among upper & lower limits, upper limit of accumulated ﬂow or error alarm output)

Battery -powered type (standard): low voltage (choose among low voltage, upper & lower limits, accumulated value upper limit or error alarm output)
For external powered only : can Conform to RS���Natural gas（��A・��A）: -��~+��℃

Modbus / RTU (���� / ����bps)

max��%RH / Nitrogen : -��~+��℃-��~+��℃

Piping connection

Protective structure *5temperature: � digits

For external powered only：�-��mADC (load resistance = max ���Ω)max ��%RH

max��%RH

under no condensation condition

under unfrozen condition

JIS��K ﬂangeUpstream straight length : ��D or longer / Downstream straight length : �D or longer

Standard piping condition *4

Ultrasonic measurement interval

External powered: �.� seconds

Total accumulated ﬂow volume ��A : actual ﬂow rate : �-digit integer + one decimal places / converted ﬂow rate : ��-digital integer

Battery-powered : � seconds / External powered : �.� seconds

Instantaneous ﬂow-rate moving average number of times (standard � times / choice from �, �, �, �, or �� times)
Indoor and outdoor useIP�� (JIS C ����)CE / UKCA ��A / ���A battery type and DC power type only The meters do not conform to ATEX (explosion-proof) directive（����/��/EU）
about ��.�kg*� Gas type can be set on site.
*� Please select when ordering.
*� Please download the RS��� output communication speciﬁcations from our productwebsite.
*� Be sure to check the piping conditions in the instruction manual before purchasing.If
there is a pressure reducing valve or ﬂow control valve, it is recommended to installit in the downstream piping of the ﬂowmeter.Please note that the required straightpipe section will change if there is a conﬂuence,enlarged or reduced pipe.
*� High temperatures can cause the electronic circuit board to be deteriorated and thebatteries to be consumed.To avoid unnecessary rise in temperature,installing asunshade is recommended.

Specifications・Instruction
manuals etc

Flow rate
conversion table

about ��.�kg

about ��.�kg

Model code
Basic Model
UW

DiameterPressure sensor

PowersupplyFlow direction

Gas type����A���
���

Description

JIS��K ﬂange
���A���A

�Type without pressure sensor

�������

Type with pressure sensor : ���kPa
Type with pressure sensor：�Mpa

BT

Exclusive lithium battery

DCAC

��VDC±��%���VAC±��%L

Left to Right

R

Right to Left

UDBottom to Top��AN�Top to Bottom��A、��A
NitrogenTechnical specifications in this catalog are up-to-date as of August 2024.

Manufactured and Distributed by

Aichi tokei denki co.,ltd.
URL: https://www.aichitokei.net/
1-2-70 Chitose, Atsuta-ku, Nagoya, 456-8691, JapanFor inquires, please contact us.
Overseas Business Division

TEL +81-(0)52-661-5150

To Our Customers

Please understand that product specifications may be changed without notice in orderto improve performance. We are always happy to provide the latest catalogs andbrochures, and respond to inquiries made to our offices.

1.2

MK-UW-000n