CLARK SOLUTIONS

Flow Meter FSI-S00-000

Flow Sensor, Saddle Mount, Impeller Type

3” & 4” Pipe Size, Pulse Output

DESCRIPTION

FSI-S00 flow meters are designed specifically for flow monitoring and flow control applications in fluidic systems where the materials of construction and performance specifications are suitable.

The flow sensors are designed specifically for irrigation measurement and control applications. The standard two-wire flow sensor output is a digital square wave proportional to flow. The characteristics of the output signal duplicate existing impeller flow sensor signals making the FSI series sensor compatible with all manufacturers' control products.

The pulse signal will travel up to 2,000 feet without amplification.

The flow sensor insert mounts in a housing that controls the depth and alignment of the impeller, unlike other insert type flow sensors that may be misaligned or set to the wrong depth. The housing is permanently attached to the PVC saddle, therefore no additional mounting hardware is required. They are rated to operate at pressures up to 150 psi.

FEATURES

• Lower flow measurement than competitive devices from unique mechanical design
• Moisture resistant construction for underground installations
• Simple installation — drill the pipe and mount the saddle — no need to measure, align or set depth
• Easy to service — single large retaining nut holds the sensor insert in the housing.

SPECIFICATIONS

Pipe Sizes:  3", 4"
Wetted Materials: 
Impeller: HDPE (High Density Polyethylene)
Shaft: Tungsten Carbide
O-ring: BUNA N
Tee, Sensor Housing, Retaining Nut: Type 1 PVC
Working Pressure:  150 PSI @ 90°F
Temperature Range:  32°F to 140°F (0° to 60°C)
Output Signal: 
Frequency Range: 0.3 Hz to 200 Hz
Output Pulse: 5 msec +/-25%
Transducer Excitation:  
Quiescent current 600 uA@8 VDC to 35 VDC max.
Quiescent voltage (VHigh) = Supply Voltage - (600uA X 
	Supply Impedance)
On State (VLow) = Max. 1.2 VDC@50mA current limit, 
	(10 Ohm + 0.7VDC)
Accuracy:  ±2% F.S.
Velocity Range (See Table 2):  0.25 to 12 FPS
0.25 to 12 FPS
3" Saddle: 6-300 GPM
4" Saddle: 10-480 GPM
Electrical Cable: 
2 single conductor solid copper U.L. listed #18 AWG leads 
	with direct burial insulation
Lead length: 48 inches
Wiring may be extended up to 2,000 feet with direct burial,	
	twisted pair shielded cable

DIMENSIONS

Table 1- Dimensions, K Factors
Model	Pipe Size	Length Inches (mm)	Width Inches (mm)	*Height Inches (mm)	**K Factor (To read flow rate in GPM)	**Offset
FSI-S30-001	3”	5.0 (127)	5.5 (140)	6.5 (165)	2.75	1.58
FSI-S40-001	4”	5.0 (127)	5.5 (140)	7.5 (190)	4.53	1.11
*Minimum clearance above sensor required for removal: 3.75 inches (96 mm)
**Frequency = (GPM/K) - Offset or GPM = Frequency x K + Offset

FLOW SENSOR OPERATING RANGE

FSI-S30/40 flow sensors use a rotating impeller to sense the water moving through the closed pipe. The speed of the impeller rotation is proportional to the velocity of the liquid. As the impeller turns, it produces digital pulses. The relationship between velocity and volumetric flow rate is dependent on the size of the pipe and may be calculated using the formula Qgpm = Vfps X D2 X 2.45 where Q is the flow rate in gpm, V is velocity in fps and D is the inside diameter of the pipe in inches. The pipe must be full for the rotational speed of the impeller to accurately reflect flow

Table 2- Flow
Model		FSI-S30-001 3”	FSI-40-001 4”
	Feet Per Second	GPM	GPM
Minimum Flow	0.25	6	10
	1	25	40
	2	50	80
	3	75	120
	5	125	200
	7	175	280
	10	250	400
	12	300	480

ELECTRICAL

1. Two conductors are required to connect the flow sensor to the monitor or control device.
2. The RED lead from the sensor is the + (Positive) lead and the BLACK lead from the sensor is the - (Negative) lead. Observe polarity when extending these conductors and connect them to the + and - leads or terminals of the FLOW SENSOR INPUT of the monitor or controller. Do not connect flow sensor to Power or Valve circuits!
3. Use a shielded Direct Burial cable with at least one twisted pair of conductors. Multiple pair cable may be used. Use #20 AWG or larger stranded copper wire conductors to extend the distance up to 2,000 feet.
4. Waterproof the splices. The preferred method is the two part epoxy kit, Scotchlok 3570 as manufactured by 3M. Follow all manufacturer’s instructions.
5. Make sure that the flow sensor housing is installed in the tee or the retaining nut is on the wire leads before making the splices.
6. Provide a service loop in the cable to allow the flow sensor housing to be removed from the tee and brought above grade for servicing.
7. Avoid making splices in the direct burial cable.

ORDERING INFORMATION

Model	Size
FSI-S30-001	3”
FSI-S40-001	4”