®
Technical Specifications
FM312
®
INSTRUMENTS, LLC.
Product Data Sheet
PDS-312 / 314
2026-07-31
Irrigation Saddle Meter
FM312 Bolt-on Irrigation
Saddle Propeller Meter
Description
Specifically designed to provide accurate
and reliable flow measurement to the
irrigation marketplace, Sparling's saddle
flow meter is the ideal solution to
trouble-free water flow measurement in
irrigation's severe environments. The
saddle design allows the meter to be used
on existing piping, and in many cases,
these meters can replace other saddle flow
meters.
These meters feature cast saddles and gear
boxes making them robust and reliable.
The simple and rugged design ensures that
the meter can be maintained using
standard tools.
The design is based on Sparling's proven
meters that have been used in agricultural,
municipal and industrial applications for
decades. The meter is perfect for
measuring flow in sprinkler systems and
center pivot systems as well as irrigation
systems used in agriculture, golf courses
and nurseries.
Accuracy
The meter's accuracy is ±2% Full Scale of
actual flow and each meter is certified by
wet flow calibration in a NIST traceable
flow lab.
Configurations
The meter is available in two
configurations:
1)
Mechanical, featuring a reliable
worm and gear pair that prevents
slippage and error in readings.
2)
Electronic, featuring the reliability
of fewer moving parts, permanent
magnets and a digital display.
Optional outputs allow for
communication with data systems.
Options
A full line of accessories is available:
•
Dummy covers
•
Register Extensions
•
Straightening vanes
•
Meter tubes, with plain or flanged
ends
•
Outputs: Scaled Pulse Outputs and
4-20mA
®
INSTRUMENTS, LLC.
Ordering Information
Table 1: BaseModelNumber
FM312
-
Mechanical
FM314
-
Electronic
Table 2: Size
04
-
4"
06
-
6"
08
-
8"
10
-
10"
12
-
12"
14
-
14"
Table 3: Mounting
0
-
U-Bolts
Table 4: Register
1
-
Mechanical Flow Totalizer
2
-
Mechanical Flow Totalizer and Indicator
3
-
FT194-II Digital Rate/Flow Totalizer
Table 5: Velocity
1
-
Low Range
2
-
Standard Range
Table 6: Accessories
0
-
None
1
-
Bolting Vanes
Model
Size
Mounting
Register
Velocity
Access.
FM312
04
0
1
1
0
Installation
To install the meterhead, prepare a template from the dimensions below. Using the template,
scribe a line for cutting, and cut opening, removing all burrs and slag.
Size
(in)
Max.
Press.
(psi)
Weight
(lbs)
J (in)
T (in)
Kr (in)
L (in)
Flow Range (GPM)
Low
Standard
4.00
100
20.0
4.62
7.19
2.31
2.56
60.0 - 400
120 - 600
6.00
100
25.0
6.62
6.62
3.31
0.00
100 - 900
200 - 1600
8.00
100
30.0
6.25
7.75
3.12
1.50
120 - 1200
240 - 2300
10.0
100
35.0
6.75
8.00
3.38
1.25
160 - 1600
320 - 3000
12.0
100
40.0
8.00
8.00
4.00
0.00
200 - 2000
400 - 4000
14.0
50.0
50.0
6.38
14.9
*
*
260 - 2500
520 - 5000
