The DalcoFlow DFMa is an ultrasonic flowmeter dedicated exclusively to quantitative pumping.
It is possible to specify the instantaneous flow rate and integrated flow rate, and output the instantaneous flow rate as a pulse signal or analog signal.

Furthermore, by combining with some models of Prominent metering pumps, it is possible to feed back the flow rate value detected by DalcoFlow to the pump and automatically adjust and control the discharge amount.

Feedback control supported models

* Gamma X
* Gamma XL (Delta)
* Sigma control, etc.
Please contact us for details.

Mechanism

An ultrasonic flow meter that utilizes the pulsation characteristic unique to positive displacement pumps. ● Measurement is possible even in the presence of large flows, pulsations, liquid contamination, or viscosity ● No metal is used in the liquid-end parts, making it possible to measure even low-conductivity liquids * However, it cannot be measured in cases of non-pulsatile flow, the presence of turbid substances, or the inclusion of air bubbles.

Model	DFMa 05	DFMa 08
Measurement range	0.1 – 13.0 L/h	0.6 – 50.0 L/h
Detectable flow range	0.03 – 10.0 ml/Stroke (discharge amount for each pump stroke)
Accuracy	±2% (100 strokes _or more) However, it may be affected by the properties of the measuring solution.
Pressure resistance	0.15 to 1.6 MPa
Allowable liquid temperature	-10 to +45 degrees No freezing
Liquid-end part material	PVDF (seal FPM / EPDM / PTFE included)
Body material	PPE + GF20 (Screws are SUS304)
Output specifications(option)	Analog output: 0/4 to 20mA DC x 1 (load resistance 400Ω (insulation)) Pulse output: 1 pulse / stroke Frequency output ： < 10kHz
Power supply specifications	Single-phase 100-230VAC ± 10% 50 / 60Hz
Ambient temperature / protection class	-10 to + 50 ° C Humidity 95% _or less / Equivalent to IP65 (indoor specifications)
Dimensions / mass	W121×H160×D122mm　/　Approx. 0.8kg

Measurement target

Water ・ Hydrogen peroxide ・ Sulfuric acid ・ Sodium hypochlorite (soda) ・ Hydrochloric acid ・ Aluminum sulfate

● Chemicals containing air bubbles and slurries
– Measurement error will increase.
● Emulsified (emulsion) state chemicals
– The measurement error will become larger.
● Caustic soda (sodium hydroxide)
– Due to the difficulty in transmitting ultrasound, measurement errors become significant.
● Other chemicals that are difficult to transmit ultrasonic waves
– If you have no track record, we recommend conducting a test in advance.