Toro TFS Flow Sensors User Manual

TFS Series, Toro Flow Sensor Installation Instructions

Overview

The Toro ﬂ ow sensors provide an accurate ﬂ ow measurements by generating a frequency signal (pulses per second) that is proportional to the ﬂ ow rate. The Toro ﬂ ow sensors are designed for below grade applications for irrigation monitoring where the ﬂ ow rates are between 0.5–30 ft/sec and temperatures are below 180º Fahrenheit. The To ro ﬂ ow sensors are supplied with two single conductor, 18 AWG solid copper wire leads with U.L. Style 116666 direct burial insulation. An internal preampliﬁ er allows the pulse signal to travel up to 2000’ without further signal ampliﬁ cation.

Models

Model Number Size Description

TFS-050 1/2” Flow Sensor, 1/2”, Plastic Tee

TFS-075 3/4” Flow Sensor, 3/4”, Plastic Tee TFS-100 1” Flow Sensor, 1”, Plastic Tee TFS-150 1.5” Flow Sensor, 1.5”, Plastic Tee

TFS-200 2” Flow Sensor, 2”, Plastic Tee

TFS-300 3” Flow Sensor, 3”, Plastic Tee

TFS-400 4” Flow Sensor, 4”, Plastic Tee

Controller Compatibility

The Toro ﬂ ow sensors are compatible with the following controllers:

• Toro TMC-424 • Toro Intelli-SenseTM TIS-360/480

• Toro SentinelTM • Toro SitePro

• Irritrol MC-E • Any controller compatible with Frequency output ﬂ ow sensor (Pulse per Second proportional to ﬂ ow velocity)

Sizing

The following table indicates the suggested ﬂ ow range of the Toro ﬂ ow sensors. Although the sensors will operate above and below the indicated ﬂ ow rates, following the suggested range will ensure the best performance from the ﬂ ow sensor. Sensors should be sized according to ﬂ ow rates rather than pipe size.

Model Number

TFS-050 1.2 – 12

TFS-075 2.7 – 28

TFS-100 5 – 50

TFS-150 5 – 100

TFS-200 10 – 200

TFS-300 20 – 300

TFS-400 40 – 500

Suggested Operating

Range (Gallons / Minute)

Suggested Operating

Range (Liters / Second)

0.1 – 0.8 0.3 – 2.7

0.2 – 1.8 0.6 – 6.4

0.3 – 3.2 1.1 – 11.4

0.3 – 6.3

0.6 – 12.6

1.3 – 18.9

2.5 – 31.5

Suggested Operating

Range (Cubic Meters / Hour)

1.1 – 22.7

2.3 – 45.4

4.5 – 68.1

9.1 – 113.6

Flow Sensor to Pipeline Installation

The accuracy of the ﬂ ow sensor’s measurement is highly dependent on proper sensor location within the piping system. Irregular ﬂ ow velocity caused by valves, ﬁ ttings, pipe bends, etc. can lead to inaccurate ﬂ ow rate measurements even though local ﬂ ow velocity measurements may be accurate. A sensor located in the pipe where it can be affected by air bubbles, ﬂ oating debris, or sediment may not achieve full accuracy and could be damaged. The Toro ﬂ ow sensors are designed to operate reliably even under adverse conditions but following recommendations will ensure maximum system accuracy.

Select a location along the pipe system that is 10 times the pipe diameter upstream and 5 times the pipe diameter downstream to minimize ﬂ ow disturbance. Pipe bends, valves, pipe ﬁ ttings, pipe enlargements and reductions should not be present within this pipe length.

Flow

10 X Pipe Diameter 5 X Pipe Diameter

Note: For 1.5” and larger ﬂ ow sensors, install according to the ﬂ ow direction shown by the arrow on the tee. For 1.0” and smaller ﬂ ow sensors, installation is not dependent on ﬂ ow direction.

Flow Sensor to Pipeline Installation

Step 1 - Remove the sensor from the tee.

a. For 1.5” and larger Sensors: Pull the clevis pin that retains the ﬂ ow sensor to the tee,

then carefully remove it from the tee.

b. For 1.0” and smaller Sensors: Unscrew the sensor cap from the tee by turning it counterclockwise.

Carefully pull the sensor out from the tee.

Step 2 - Properly clean the pipe ends and tee socket.

Step 3 - Use solvent cement to secure the pipes to the tee.

Step 4 - Reinstall the sensor to the tee as follows:

a. For 1.5” and larger Sensors:

i. Align the ﬂ ow arrow on top of the sensor housing to the direction of the ﬂ ow.

ii. Carefully press the sensor straight into the tee. iii. Install the clevis pin through the tee and sensor. iiii. Install the cotter ring into the clevis pin.

b. For 1.0” and smaller Sensors:

i. Carefully line up the guide pin on the sensor to the slot on the tee.

ii. Carefully press the sensor straight into the tee. iii. Screw the sensor cap ﬁ rmly onto the tee.

Note: Hand tighten the sensor only.

Step 5 - Complete the wiring connections.

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