7178-514
Small Size Flow Sensor -Microstream OF Sensor Handling Manual

Red line (power)
Black line (COM)White line (signal)

RoHS Compliance

1 Cautions(1) Check the flow rate,working pressure, and temperature ranges indicated on the seal or plate anduse the product under the appropriate condition.
(2) Do not use in an explosive atmosphere because it is not explosion-protected.
(3) Connect the pipes so that they do not apply stress to the joint parts(It is recommended to use tube pipes using hose joints).
(4) Ensure that the fluid must be anticorrosive against the wetted part of the sensor(Hydrochloric acid, sulfuric acid, nitrates, sodium hypochlorite, and/or similar chemicals
cannot be used).

Output signal

Red Black White(2) Output signal waveform
AB

Duty ratio A:B = 2:8 to 8:2
Hi (power supply voltage 12VDC:10VDC or higher,

2 Piping and installation(1) The product can be installed in a vertical or horizontal pipe as far as its seal is perpendicular tothe ground.
Horizontal installation
Vertical installation

power supply voltage 3 VDC:2 VDC or higher)
Lo (1 VDC or lower)
0V<OFZT-MR model: 4-wire magnetic sensor, open collector pulse output>(1) Apply the power supply voltage of 3 to 24 VDC to the red (+) and black (-) lines.
Signals are output between the white (signal +) and black lines as open collector pulses.
Short-circuit the blue line (feedback) to the white line.
Connect a pull-up resistance of 50 kΩ or less so that the output sink current is becomes
6 mA or lower (Is[mA] = Power supply voltage [V] / R [kΩ]).

Flow direction
Flow direction

SealPower supply voltage

Flows from the top to bottom(Similar to the flow from the bottom to the top)(2) Install the sensor to match the flow direction with the direction indicated by the arrow on theproduct. Be careful not to allow air ingress into flow.
(3) Avoid installing the flowsensor where it is exposed to a direct sunlight or rain drops (indoorspecifications).
(4) Be careful not to allow foreign substances (e.g., shavings of pipes, pieces of sealing tape) toenter the pipe. Do not remove the protection cap at the joint ends until installing the product.
(5) Fluid containing foreign substances cannot be measured. If they can be mixed in the fluid, use astrainer of 80 mesh or finer to remove them.
(6) Pulsating flow (i.e. reverse flow) can affect the measurement accuracy.
Use an accumulator or non-return valve to cancel the pulsation.
(7) Do not install the product near a noise source such as strong radio wave, magnetic field,induction voltage, spark noise, etc. The internal magnetic sensor may malfunction.
(8) The recommended tightening torque at piping is 5 ± 2 N · m for DN05, and 7 ± 2 N · m for DN10.

Red line (power)
Blue line (feedback)White line (signal)
Black line (COM)WhiteRedBlackBlue(2) Output signal waveform
AB

ＩｓDuty ratio A:B = 3:7 to 7:3

HiLo
4 Model code
OF

**

Z

*

T-*

RModelDescription
Small size flow sensor

Size

05: 5 mm
10: 10 mm
ZZ
Fluid3 Cabling<OFZT-AR model: 3-wire magnetic sensor, voltage pulse output>(1) Apply the power supply voltage of 3 to 24 VDC to the red (+) and black (-) lines. Signals areoutput between the white (signal +) and black lines as voltage pulses.

Ｒ

A: Cold/hot water, fuel oil
Z: Pure water, chemical fluid
TT-Output

A: Voltage pulse (3-wire)
M: Open collector (4-wire)R

RoHS-CompliancePower supply
voltage
Output signal

7178-514
5 External dimensions<OFZT-AR model>

7 Warranty● Warranty period
One year after the dispatch date from Aichi Tokei Denki facility .

<OFZT-MR model>[Unit:: mm][Unit:: mm]● Warranty scope
We are making every effort to produce our products with high quality , however if a defect which issubject to our liability should occurs during the warranty period under normal use, we shall repair theproduct or replace it with a normal product for free.
Please understand that we shall determine whether the free remedy shall apply to your situation after
our investigation of the product .
Also please understand that the free remedy shall not be applied to a defect:

Approx. 480 mm

Approx. 600 mm

Figures in ( ) are for OF05. Those without figures in ( ) are common to all models.
6 Specifications
Item
Measurement
Fluid

Flow rate rangeOF05ZAT-AR, MR

OF05ZZT-AR, MR

Cold and hot water,kerosene, diesel oil,fuel oil, etc

Pure water, slightly
acid solution, weakalkaline solution, etc

OF10ZAT-AR, MR
Cold and hot water,
kerosene, diesel oil,fuel oil, etc

OF10ZZT-AR, MR
Pure water, slightly
acid solution, weakalkaline solution, etc

Fluid viscosity 0.3 to 0.8 mPa･s:5 to 50L/h
Fluid viscosity 0.8 to 2 mPa･s:3 to 50L/h

Fluid viscosity 0.3 to 0.8 mPa･s:40 to 300L/h
Fluid viscosity 0.8 to 2 mPa･s:20 to 300L/h

Fluid viscosity 2 to 5 mPa･s:1 to 50L/h
Fluid viscosity 5 to 200 mPa･s:0.5 to 50L/h

Fluid viscosity 2 to 5 mPa･s:10 to 300L/h
Fluid viscosity 5 to 200 mPa･s: 5 to 300L/h

Accuracy
Maximum pressure

Please note that “ warranty ” in this context means warranty for our product alone and we shall not
reliable for any damage resulting from a defect of our product , including but not limited to a damage toequipment other than our product , loss of profit , loss of opportunity , transportation fee , andconstruction fee.

±2%R.S.
0.5 MPaPressure loss
Fluid temperature range

4 kPa or less

10 kPa or less
-10 to +70℃ (no freezing)

Environmental
temperature and humidity-10 to +70℃ 35 to 85%RH (no dewing)

Output signal
Output pulse factor

OF**Z*T-AR: Voltage pulse (3-wire), OF**Z*T-MR: Open collector (4-wire)
0.46 mL/P
2.5 mL/P

Maximum frequency
Minimum pulse width

Approx. 30 Hz
Approx. 0.0065 s

Power consumption
Structure

Approx. 33 Hz
Approx. 0.006 s

0.2VA or less
Splash-proof structure (IP64 equivalent)

Connection Size
WeightR1/4Approx. 100 g

R1/2
Approx. 140 g

Case
WettedPart
Material(1) Caused by use which dose not follow the instructions given in our catalog , productspecifications , and/or handling manual,(2) Caused by a disaster such as a fire , earthquake , storm , flood , or lightening , or a destructive
act such as a crime,(3) Caused by corrosion due to use in a corrosive environment,(4) Caused by act of animals such as a dog , cat , rat , or insect,(5) Caused by a factor other than our product,(6) Which could not be foreseen with the science and technology levels at the time of shipment,(7) Caused by repair or alteration other than done by or specified by us , and/or(8) Caused by an inappropriate inspection and/or maintenance or replacement of aconsumables.

1-2-70 Chitose, Atsuta-ku, Nagoya, Aichi Prefecture 456-8691 JAPAN

PPS
PPS

Rotor
Plate
O-ring

NBR

FKM

PPS
NBR

FKM

Shaft

SUS304SiC

SUS304SiC

Contact us : Overseas Business Division
TEL. +81-(0)52-661-5150
FAX. +81-(0)52-661-6418
Aichi Tokei Denki homepage: https://www.aichitokei.co.jp
The product specification might be changed without prior notice.

Ver32019.08