Ryuki ODM-300 Differential Pressure Flow Meter

A diagram is of model ODM-300SDR Standard Type

Differential pressure is generated by throttling fluid that is flowing in a pipe at (A) as shown in the diagram. By measuring the differential pressure, you can determine the flow rate. In the case of this flow meter, the differential pressure generated in the differential pressure detector is received by a diaphragm of the indicator, and the movement makes the needle shake mechanically with a cam mechanism, and the flow rate is indicated.

  • Model ODM-300: General industrial water, seawater, oil, chemicals, other liquids, and similar fluids.
  • Model ODM-300S: Contacts are provided for model ODM-300 so that in addition to flow rate indication, it can show whether or not there is a specified flow rate.


Specification :

Pressure Range

0.051.0MPa (G)

Temperature Range

0100ºC (No condensation or freezing conditions).

Flow Rate Accuracy

±2% (full scale)

Connection Method

Flange Insertion Method

Differential Pressure


Number of Contacts


Contact Method


Contact Capacity

AC125V-5A, 250V-5A

Withstand Voltage

AC125V-5A, 250V-5A (resistance load)

Insulation Resistance

100 MΩ or more with DC500V megger (between terminal and case)

Note: Pressure range and temperature range may vary depending on the material at the connection.

How to Order :

*Example: ODM-300-S-DR-150A•10K-2500L/min-BC
Product of model ODM-300, with one contact, with stop valve, diameter: for 150A•JIS10K, The flow rate range is 500 - 2500 L/min and the material of the main part is BC.

Reference: http://www.ryuki.jp