®
Technical Specifications
FM102
®
INSTRUMENTS, LLC.
Product Data Sheet
PDS-102
2026-07-31
Series 102 Direct Drive
Meters
Description
The Series 102 Direct Drive Meters are
designed to provide accurate and reliable flow
measurements where mainline service is
required in the municipal and industrial areas.
These meters have been used for over seventy
years and have proven their reputation for
rugged, continuous duty with minimum
maintenance.
This meter can be easily maintained or repaired
with standard tools. The mechanical worm and
gear drive is positive and prevents the
possibility of slippage and low readings.
The meter is available as a meterhead only or a
meterhead complete with saddle or tube.
See
PDS-110.
Temperature Limits
Liquid working temperatures should not exceed
100°F. Propellers may be stored in air
temperatures up to 175°F.
Principle of Operation
Sparling propeller meters utilize the simple
principle of the screw propeller to register the
total flow, much as an odometer registers auto
mileage. The rotation of the propeller affords a
basis for indicating and recording gallons per
minute or other rates.
Installation
Meters must be installed in full flowing suction
or discharge lines. Avoid valves, fittings or
obstructions immediately upstream of the
meter which may cause jetting or
non-symmetrical flow profiles. It is
recommended that a minimum of five straight
pipe diameters be maintained upstream and
one diameter downstream of the flow meter.
Certified Accuracy
Accuracy is within 2% of actual flow for the
specified meter range. This accuracy is
guaranteed by certified wet calibration at three
test points in Sparling's NIST traceable primary
flow laboratory. Each meter is tested at low
flow, mid-range, and high flow. A test
certificate is provided with each meter.
Flow Ranges
These meters measure accurately over a wide
flow range of 10:1 or greater. The maximum
flow ranges can be safely exceeded by 50%
when used intermittently. Flow rates are
provided in the table under specifications for
each of the sizes.
Anticipated flow ranges and minimum and
normal flow rates should always be specified
on application sheets accompanying your
order.
®
INSTRUMENTS, LLC.
Options
High Velocity Flows
- If the minimum actual flow rate exceeds
the minimum published flow rate in Table 1, high velocity
construction is required. Specially configured propellers and
bearings are used.
When continuous flow rates exceed twice the minimum
standard flow rate in Table 1, high velocity construction is
required.
Anticipated flow ranges and minimum and normal flow rates
should always be specified on application sheets accompanying
your order. This information is required for proper evaluation of
meter construction.
Transmitters
- Electronic transmitters are available for
installation on these meters.
See PDS-190.
Rate-of-Flow Indicators
- When continuous rate of flow
indication is required, an optional rate-of-flow indicator and
totalizer is available.
See PDS-190.
Size
Flow Range (GPM)
Standard
High
2
30 - 80
60 - 150
3
35 - 200
70 - 360
4
60 - 400
120 - 600
6
100 - 900
200 - 1600
8
120 - 1200
240 - 2300
10
160 - 1600
320 - 3000
12
200 - 2200
400 - 4000
14
260 - 3000
520 - 5000
Table 1: BaseModelNumber
FM102
-
Direct Drive Meterhead
FM182
-
Basic Magnetic Drive Meterhead
FM182
-
Basic Direct Drive Meterhead
Table 2: Size
02
-
2"
03
-
3"
04
-
4"
06
-
6"
08
-
8"
10
-
10"
12
-
12"
14
-
14"
Table 3: PressureRating
1
-
150 psi
2
-
250 psi
Table 4: FlowRange
1
-
Standard Range
2
-
High Range
Table 5: Readouts
0
-
None
Table 6: Accessories
0
-
None
Model
Size
Pressure
Flow
Readouts
Access.
FM102
02
1
1
0
0
*
If meter is operated continuously at flows above the mid-point of the standard flow range, rubber bearings are required.
®
INSTRUMENTS, LLC.
Flow Rates & Dimensions
Six-bladed
propeller
Three-bladed propeller
Size (in)
2
3
4
6
8
10
12
14
Weight* (lbs)
20
20
20
25
29
34
36
37
A
8.13
8.25
9.5
10.38
11
11
11
11
B
5.13
6.25
6.75
7.31
10.63
10.63
10.63
10.63
C
3.13
3.18
4.13
3.96
5.81
5.81
5.81
5.81
Min. D
Sparling Standard
E
4
4
6.94
6.31
6.31
6.31
6.31
6.31
F
2.38
2.75
3.5
4.75
7
8
10
11
M
1.75
2.75
3.44
4.25
5.31
6.31
7.31
8
Size of Bolts
7
16
7
16
3
8
7
16
7
16
7
16
7
16
7
16
Length Of Bolts
1
1
1
1
1.25
1.25
1.25
1.25
Number Of Bolts
10
10
8
10
10
10
10
10
*
Weight of complete meter less straightening vanes.
*
Factory can advise Rates and Dimensions for meters up to 120" in size
