Dwyer MFS2 - Manual (Page 13)

Series MFS2 Technical data
Technical changes reserved - 13 -
9 Technical data
The technical data of customized versions may differ from the data in these instructions.
Please observe the information specified on the type plate.
9.1 Characteristics MFS2
Type MFS2-1 MFS2-2 MFS2-3 MFS2-4 MFS2-5 MFS2-6
Measurement device characteristics
Flow range [gpm] 0.066…1.3 0.26…5.3 0.66…13.2 1.3…26.4 2.6…53 3.3…66
Accuracy* ±1% of reading
Repeatability 1%
Output signal starting
from [gpm]
(Accuracy 5%)
0.02 0.07 0.27 0.52 1.05 1.3
Max. flow rate [gpm] 1.6 6.6 15.8 31.7 63.4 79.3
Response time < 100 ms
Indications red LED = Supply voltage • green LED = Flow
Output signal characteristics
Frequency output:
- Pulse rate / K-Factor**
[pulses/gal]
15000 3000 1500 750 380 300
- Resolution** [ml/pulse] 0.25 1.3 2.5 5.0 10.0 12.6
- Signal shape Square wave signal • duty cycle 50:50
can be connected as PNP or NPN open collector
- Signal current ≤ 25 mA
Electrical characteristics
Supply voltage 24 VDC ±15%
Power consumption 0.6 W
Electrical protection
measures short-circuit proof • protected against polarity reversal
Electrical connection 4-pin plug M12x1
Degree of protection IP 65 (only with a connected coupling)
Process variables
Medium to measure Water and other conductive liquids
Min. conductivity of the
medium 20 μS/cm
Medium temperature 14…140 °F (not freezing)
Ambient temperature 41…140 °F
Nominal diameter DN 8 DN 15 DN 20 DN 25
Inner diameter 0.31 in 0.55 in 0.71 in 0.98 in
Max. working pressure
(at … °F) 145 psi (68 °F) • 116 psi (104 °F) • 87 psi (140 °F)
higher pressure ratings on demand
Process connection ½ - 14 NPT ¾ - 14 NPT 1 - 11.5 NPT 1¼ - 11.5
NPT
* test conditions: Water 73.4 °F
** other pulse rate / resolution on request.
optional: Output signal with lower frequency, designed specifically for connection to digital PLC
inputs.