Seametrics M-Series - Manual

General Information
M-Series meters use the multi-jet principle, which has
been an internationally-accepted standard for many
years. This type of meter is known for its wide range,
simplicity, and accuracy in low-quality water. The im-
peller is centered in a ring of jets, with inlet jets on one
level and outlet jets on another. A gear train drives the
register totalizer dials. For pulse output, one of the
dials is replaced by a magnet, which is detected by an
encapsulated sensor threaded into the outside of the
lens. Pulse rate is determined by the number of poles
on the magnet and the dial placement. Changing the
pulse rate requires no special tools and can be done in
the field.
Mechanically, all M-Series meters are the same. The
difference between ME, MR, and MT meters is in the
sensor. ME meters use a solid-state, long-lasting Hall-
effect sensor, which requires power. It is suited for use
with SeaMetrics controls and metering pumps (LMI for
instance) which have sensor power. MR meters use a
two-wire reed switch. They provide a dry contact clo-
sure and do not require power. MT meters totalize only
and do not have a sensor.
Features
M-Series Pulse Meter
Instructions
Specifications
Materials
Case Cast bronze
Internals Engineered thermoplastic
Magnet Ceramic permanent
Temperature 105
°
F, 40
°
C
Max. Pressure 150 PSI operating
Accuracy 1-1/2% of reading
Sensor
ME Hall-effect device
MR Reed switch
Max. Current
ME 20 mA
MR 50 mA
Max. Voltage
ME 24 VDC
MR 24 VDC or 24 VAC
Sensor Power (ME) Minimum 6 mA at 12 VDC
Cable Length 12 ft. standard, 2,000 ft. max.
Flow Rates (GPM):
LT-10613A
Page 1 of 4
3/4" 1" 1-1/2" 2"
Minimum 0.25 0.30 0.50 1.00
Maximum 20 50 100 130
Either ME or MR sensor
threads into lens without
removing top
Top removes with no
special tools
Cast bronze body-
meets AWWA
specifications Union end couplings
for easy service
Connector for metering pump or
SeaMetrics control standard
on ME, optional on MR
DIS
CON
TIN
UED