DPM Pelton Wheel Flow Sensor


  • Flow Range: 0.24...4.8 GPH to 0.8...80 GPH
  • Brass or Stainless Steel Bodies
  • Frequency Pulse or 4-20 mA Outputs
  • Long-Life Sapphire Axle/Bearing Assembly
  • Compact Design


The DPM Series flow sensor uses the pelton wheel principle to measure the flow of water and water-based, low-viscosity liquids that are optically transparent. Liquid passes through a nozzle at the inlet of the flow body and is precisely directed onto a flat-blade pelton turbine. The flow sensor’s pelton turbine wheel rotates at a speed proportional to flow rate. The movement of the pelton wheel is detected optically, and the signal from the optical sensor is processed as an amplified pulse or 4-20 mA signal, both of which are proportional to flow rate. In addition to the DPM Series pelton wheel flow sensor’s compact design, the inlet flow is redirected via a nozzle; therefore, no inlet or outlet straight piping is required and allows the unit to be mounted in any orientation with the axle remaining in the horizontal plane. These features make the DPM Series flow sensor ideal for mounting in locations where space is tight.



DPM..K000 & DPM..F300: ±2.5% of f. s.

DPM..L, DPM..C & DPM..Z: ±1.5% of f. s.

Maximum Pressure: 230 PSIG

Operating Temperature: -10...176 °F

Electrical Protection: IP 65

Materials of Construction

Housing: 316L SS or Ni-Plated Brass depending on model number

Nozzle: 316L SS

Axle/Bearing: Sapphire

Pelton Wheel: Polypropylene


O-ring: NBR for Brass housings, FKM for 316L SS housings

Electrical Specifications
Frequency Output
Output Type

DPM..K000: NPN, open collector,10 mA max.

DPM..F300:PNP, open collector,25 mA max.

Input Power

DPM..F300:24 VDC ±20%

DPM..K000:4.5-12 VDC

Frequency Range: Based on model number

Electrical Connection
DPM..K000: 5 ft. PVC cable
DPM..F300:Micro-DC plug,4-pin male
4-20 mA Output
Output Type: 4-20 mA, 3-wire
Max. Loop Load: 500 ohms
Power Requirement: ±24 VDC 20%
Electrical Protection: IP 65
Electrical Connection: Micro-DC plug,4-pin male or DIN 43650(Hirschmann) plug
Compact Electronics
Output Types: Analog output with1 open collectorswitch or 2 opencollector switches
Analog Output: 4-20 mA, 3-wireRL<500 ohms
Switch Type: PNP opencollector based onordering code
Switch Rating: 300 mA Max. shortcircuit protected
Power Requirement: 24 VDC ±20%
Display Type: 3 digit LED
User Programmable Functions:Transmitter span,switch setpoint,lockout code
Housing: 304 SS
Electrical Connection: M-12 Micro-DC plug,5-pin male