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The DPM series flow sensor uses the pelton wheel principle to measure the flows of water and low viscosity liquids. Liquid passes through a nozzle at the inlet of the flow body and is precisely directed onto a flat blade pelton turbine. The turbine wheel rotates at a speed which is proportional to flow rate. The movement of the pelton wheel is detected optically. The signal from the optical sensor is processed as an amplified pulse or 4-20 mA signal which are proportional to flow rate. In addition to the compact design, the inlet flow is redirected via a nozzle, therefore no inlet or outlet straight piping is required and the sensor can be mounted in any orientation. These features make the DPM ideal for mounting in locations where space is tight.
Accuracy: ±1.5% of full scale
Maximum Pressure: 230 PSIG
Operating Temperature: -10 to 176°F
Materials of Construction
Housing: 316L stainless steel or brass depending on model number
Nozzle: 316L stainless steel
Axle/Bearing: Sapphire
Pelton Wheel: Polypropylene
Receiver: Polysulfone
O-ring: Buna-N for brass housings, Viton for 316L SS housings
Electrical Specifications
Frequency Output
Output Type: PNP open collector, 25 mA max.
Input Power: 24 VDC ±20%
Frequency
Range: Based on model number
Electrical
Protection: NEMA 4X/IP 65
Electrical
Connection: 6 ft. PVC cable or 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: NEMA 4X
Electrical
Connection: Micro-DC plug, 4-pin male or DIN 43650 (hirschmann) plug
Compact Electronics
Output Types: Analog output with 1 open collector switch or 2 open collector switches
Analog Output: 4-20 mA, 3-wire RL<500 ohms
Switch Type: PNP open collector based on ordering code
Switch Rating: 300 mA Max. short circuit protected
Power
Requirement: 24 VDC ±20%
Display Type: 3 digit LED
User Programmable
Functions: Transmitter span, switch setpoint, lockout code
Housing: 304 SS, NEMA 4X
Electrical
Connection: Micro-DC plug, 5-pin male
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