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FTB300 Series

Page 3

Wiring Diagram

Foot Strainer

Strainer Adapter

Strainer Body

Screen Strainer

Suction Tubing

Part Number

FPUSV-V

Exploded View

Your FTB300 flow verification sensor package includes a Foot Strainer (see diagram below). This strainer will prevent any 

small particles from entering and clogging the Sensor Body. Diaphragm pumps will require a strainer and a check valve. 

The part number for the strainer that includes a check valve is FPUSV-V. 

Sensor

+

_

Red

0v dc

(True digital Square-wave output)

+5v dc

Bare

Black

(Ground)

Sensor connections:

Input voltage (vdc) 8 to 28 vdc

Output voltage (v) “high state” 4 80 v dc min (5 vdc normal)

Output voltage (v) “low state” 0 2v dc max

+ 5 Vdc (signal output)

8 to 28 Vdc (Positive)

K-Factors (pulses per fluid volume)

30-300

1

100-1000

2

200-2000

3

300-3000

4

500-5000

5

700-7000

6

181,336
81,509
42,051
25,153
15,737
9,375

Flow Range

(ml/min)

Body 

Size

Pulses per 

Gallon

21,535
13,752

6,646

4,157
2,477

Pulses per 

Liter

47,909

Useful formulas

60 / K = rate scale factor

rate scale factor x Hz = flow rate in volume per minute

1 / K = total scale factor

total scale factor x n pulses = total volume

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