FLOW SENSOR. PLF2105 Datasheet

PLF2105 SENSOR. Datasheet pdf. Equivalent

PLF2105 Datasheet
Recommendation PLF2105 Datasheet
Part PLF2105
Description LIQUID FLOW SENSOR
Feature PLF2105; PLF2000 Series LIQUID FLOW SENSOR FOR WATER METERING 131 E. Brokaw Road | San Jose CA 95112 | +1 (40.
Manufacture Posifa
Datasheet
Download PLF2105 Datasheet




Posifa PLF2105
PLF2000 Series
LIQUID FLOW SENSOR FOR WATER METERING
131 E. Brokaw Road | San Jose CA 95112 | +1 (408) 392-0989 | info@posifatech.com | www.posifatech.com
DESCRIPTION
Posifa designed the PLF2000 series of liquid flow
sensors to replace mechanical turbine flow sensors.
With a MEMS thermal flow die at its core, PLF2000
is far more accurate and repeatable, even when
flow is pulsatile and provides a linear digital output.
Because it has no moving parts, PLF2000 does not
get stuck nor suffer mechanical breakdown. Cleaning
does not require disassembly. Also, because it does
not introduce an obstruction (i.e. turbine) in the flow
path, it presents minimal flow resistance, making it
possible to circulate liquid via gravity, a boiler, or a
low-power pump.
PLF2000 features Posifa’s third-generation thermal
flow die, benefiting from the latest innovations
in microfabrication. The sensor die uses a pair of
thermopiles to detect changes in temperature
gradient caused by mass flow, delivering excellent
signal-to-noise, and repeatability. The “solid state”
thermal isolation structure eliminates the need
for the surface cavity or fragile membrane used in
competing technologies. The sensor die, with its
silicon carbide protective film, is capable of direct
contact with liquid, allowing the highest level of
sensitivity and minimizing the cost of packaging.
PLF2000 complies with NSF/ANSI 61: Drinking
Water System Components – Health Effects and can
be used safely in water and beverage appliaces.
PLF2000 provides both analog (voltage) and digital
I2C output.
APPLICATIONS
Coffee and expresso machines
• Water dispensers
Water purifiers and filtration systems
Beverage vending machines
Detergent vending machines
Cleaning chemical mixing systems
• Liquid cooling systems
FEATURES
No moving parts
Extremely fast response time (< 5 ms)
Can be used with pulsatile flow systems
Does not obstruct flow (low pressure drop)
• Disassembly not required for maintenance
MAXIMUM RATINGS
Operating Temperature: 5 °C to 75 °C
Storage Temperature: 5 °C to 80 °C
Operating Pressure: 50 psi
Datasheet_PLF2000_LiquidFlowSensor_Rev1_C6 | Nov 2020 | PAGE 1 OF 5



Posifa PLF2105
PLF2000 Series
LIQUID FLOW SENSOR FOR WATER MONITORING
131 E. Brokaw Road | San Jose CA 95112 | +1 (408) 392-0989 | info@posifatech.com | www.posifatech.com
SPECIFICATIONS
SPECIFICATIONS
PLF2105
PLF2135
Test Conditions: Vin=5±0.01VDC, Ta=22°C.
MIN
50
100
TYP
MAX
UNIT
700
ml/min
10000 ml/min
CONDITIONS
Output Count (calibrated)
409 to 3686
count
Null Count (calibrated)
380
440
count
Output Count (raw)
30000 to 45000
count
Output (calibrated)
0.5 to 4.5
VDC
Flow Repeatability
0.5
% F.S.
Flow Response Time1
5
ms
Warm Up Time
5
sec
Operating Pressure
50
psi
Operating Temperature
5
75
°C
Storage Temperature
5
80
°C
Supply Voltage
5
5.5
VDC
Supply Current
15
mA at 5 VDC supply
Wetted Materials
NSF/ANSI 61 compliant nylon, silicone and food grade conformal coating
Notes:
1. 10% to 90% rise time of the flow sensor to electrically respond to any mass flow change. May be affected by the pneumatic interface.
Datasheet_PLF2000_LiquidFlowSensor_Rev1_C6 | Nov 2020 | PAGE 2 OF 5



Posifa PLF2105
PLF2000 Series
LIQUID FLOW SENSOR FOR WATER MONITORING
131 E. Brokaw Road | San Jose CA 95112 | +1 (408) 392-0989 | info@posifatech.com | www.posifatech.com
OUTPUT DESCRIPTION
For PLF2105
Calibration Conditions: 20 °C, supply = 5V, flow is driven from a centrifugal pump.
For PLF2135
Flow Output
(ml/min) (volt)
0
0.5
85
1.71
100 1.78
150 1.96
202 2.20
303 2.60
402 2.92
503 3.15
602 3.27
702 3.35
Count
409
1362
1403
1572
1761
2103
2353
2535
2650
2715
Flow Output
(ml/min) (volt)
0
0.51
100 1.05
1050 2.35
2390 2.89
3060 3.12
4240 3.38
5520 3.61
7060 3.75
9000 4.32
10000 4.52
Count
412
853
1890
2370
2510
2695
2930
3050
3370
3580
Calibration Conditions: 20 °C, supply = 5V, flow is driven from a pressurized tank.
Datasheet_PLF2000_LiquidFlowSensor_Rev1_C6 | Nov 2020 | PAGE 3 OF 5







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