Reliability

M-Series meters are designed to contain very few wearable and replaceable parts. Meter construction enables fast and easy on-site servicing without the need to remove the body from the pipe work.

M1 & M2 low flow models

The smallest models in the M-Series range provide low cost high resolution pulse meters capable of measuring fluids with viscosity's from 1 to 1000 centipoise. Body and rotor materials are either PPS or 316 S/Steel with Hastalloy C shafts available for extremely aggressive chemicals. Pulse output is either Hall effect or reed switch.

M5 to M50 small to high flow models

Higher pressure ratings than the standard M1 & M2 as well as a variety of connection types, pulse output and display options make for a high degree of diversity among the rest of the models within the M-Series range.
Aluminium or 316 S/steel bodies and a choice of PPS or S/Steel rotors are some of the options designed to help you tailor the flow meter to your particular needs. All models feature exceptionally low pressure drops of less than 1 Bar at full flow allowing for economical pump selection or gravity fed applications.

Display Options

Head mounted and remote display options specific to M-Series meters are available, although various output options ensure M-Series meters are compatible with many types of third party instrumentation.

Applications

M-Series meters will accurately measure, mix, batch and dose an extremely wide variety of fluid mediums including aggressive and intrinsically safe applications. A choice of construction and sealing materials coupled with high viscosity and high temperature options enable the engineer to select a model which is tailored to the application at hand.

M1 Series 1/4" Flow Meters

M1 - 1/4" Pulse Meters

The M1 is the smallest capacity meter in the range. An excellent turn-down 100:1 and high resolution (1 pulse per cc) make this meter an ideal choice for accurate low flow metering.

It has the ability to handle a wide range of fluid viscosities with exceptional levels of repeatability and durability.

A New high pressure M1 (551 bar) has recently been introduced

> M2 0.25 to 8.33 Litres/min

> M4 1 to 30 Litres/min

> M7 3 to 80 Litres/min

> M10 6 to 120 Litres/min

> M40 10 to 250 Litres/min

>M50 15 to 350 Litres/min

> Accessories

> Displays

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Model	M1RSP-XY	M1SSP-XY	M1SSPH-X
Meter Type	Pulse	Pulse	Pulse
Meter Body Material	PPS	316 Stainless Steel	316 Stainless Steel
Wetted Components:
Rotor Material	316 S/St or PPS option	316 Stainless Steel	316 Stainless Steel
Shafts	316 St/Steel or Hastalloy Opt	316 Stainless Steel	316 Stainless Steel
O'ring	Viton- Standard	Viton- Standard	Viton- Standard
Flow Rate Ranges (litres per hour/US gallons per hour)
Above 5 CPS	2 to 100 / 0.53to 26.4	2 to 100 / 0.53 to 26.4	2 to 100 / 0.53to 26.4
Below 5 CPS	5 to 100 / 1.32 to 26.4	5 to 1007 / 1.32 to 26.4	5 to 100 / 1.32 to 26.4
Accuracy within (of reading)	+/- 1%	+/- 1%	+/- 1%
Repeatability	0.03%	0.03%	0.03%
Maximum Viscocity	1000 Centipoise	1000 Centipoise	1000 Centipoise
Maximum Operating Pressure	500kPa/ 75 PSI/ 5 BAR	1000kPa/ 150PSI/ 10BAR	55160kPa/ 8000PSI/ 551BAR
Pulser Type	Hall Effect Sensor or Reed Switch	Hall Effect Sensor or Reed Switch	Hall Effect Sensor
Pulses per litre/US Gallon	1000 / 3785.4	1000 / 3785.4	1000 / 3785.4
Model Dimensions
Meter Body	50x50mm / 1.97"x1.97"	50x50mm / 1.97"x1.97"	86mm dia x 110mm h / 3.4" dia x 4.33" h
Port face to face	65mm / 2.58"	65mm / 2.58"	83mm / 3.26"
Weight	240g / 8.5oz	600g / 21.2oz	3.3kg / 116.5oz
Max. Operating Temperature	80°C / 176°F	120°C / 248°F	120°C / 248°F
Recommended Mesh strainer size	200 Mesh	200 Mesh	200 Mesh

M2 Series 1/4" Flow Meters

M2 - 1/4" Pulse Meters

The M2 is one of the small capacity meters in the range . It has a low to medium flow range which has made it a very popular model.

It has the ability to handle a wide range of fluid viscosities with exceptional levels of repeatability and durability

A New high pressure M2 (551 bar) has recently been introduced

> M1 0.03 to 1.6 Litres/min

> M4 1 to 30 Litres/min

> M7 3 to 80 Litres/min

> M10 6 to 120 Litres/min

> M40 10 to 250 Litres/min

> M50 15 to 350 Litres/min

> Accessories

> Displays

> Top of page

Model	M2RSP-XY	M2SSP-XY	M2SSPH-XY
Meter Type	Pulse	Pulse	Pulse
Meter Body Material	PPS	316 Stainless Steel	316 Stainless Steel
Wetted Components
Rotor Materials	316 St/Steel or PPS Option	316 Stainless Steel	316 Stainless Steel
Shafts	316 St/Steel or Hastalloy Opt	316 Stainless Steel	316 Stainless Steel
O'ring	VITON- Standard	VITON- Standard	VITON- Standard
Flow Rate Ranges (litres per hour/US gallons per hour)
Above 5 CPS	15 to 500 / 4 to 132	15 to 500 / 4 to 132	15 to 500 / 4 to 132
Below 5 CPS	25 to 500 / 6 to 132	25 to 500 / 6 to 132	25 to 500 / 6 to 132
Accuracy within (of reading)	+/- 1%	+/- 1%	+/- 1%
Repeatability	0.03%	0.03%	0.03%
Maximum Viscosity	1000 Centipoise	1000 Centipoise	1000 Centipoise
Max. Operating Pressure	500kPa/ 75 PSI/ 5 BAR	1000kPa/ 150PSI/ 10BAR	551600kPa/ 8000PSI/ 551BAR
Pulser type	Hall Effect Sensor or Reed Switch	Hall Effect Sensor or Reed Switch	Hall Effect Sensor
Pulses per litre/US Gallon	400 / 1514.2	400 / 1514.2	400 / 1514.2
Model Dimensions
Meter Body	50x50mm / 1.97"x1.97"	50x50mm / 1.97"x1.79"	86mm dia x 110mm h 3.4" dia x 4.33" h
Port Face to Face	65mm / 2.58"	65mm / 2.58"	83mm / 3.26"
Weight	240g / 8.5oz	600g / 21.2oz	3.3kg /116.5oz
Max. Operating Temperature	80°C / 176°F	120°C / 248°F	120°C / 248°F
Recommended Mesh Strainer Size	200 Mesh	200 Mesh	200 Mesh

M4 Series - 1/2" Flow Meters

The M5 series are the small to medium capacity meters in the Macnaught range. They have the ability to handle a wide range of fluid viscosities with exceptional levels of repeatability and durability. EEx d Certified

Optional features include:

• Dual pulse output
• Analogue output
• High viscosity rotors (up to1,000,000 Centipoise)
• Head-mounted Rate/Totaliser and Batch controller LCD Display (EEx ia 0ption)
• Mechanical Display option

> M1 0.03 to 1.6 Litres/min

> M2 0.25 to 8.3 Litres/min

> M7 3 to 80 Litres/min

> M10 6 to 120 Litres/min

> M40 10 to 250 Litres/min

> M50 15 to 350 Litres/min

> Accessories

> Displays

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Model	M4ARP-X	M4ASP-X	M4SRP-X	M4SSP-X
Meter Type	Pulse	Pulse	Pulse	Pulse
Meter Body Material	AA601 Aluminium	AA601 Aluminium	316 Stainless Steel	316 Stainless Steel
Wetted Components
Rotor Material	PPS	316 Stainless Steel	PPS	316 Stainless Steel
Shafts	316 Stainless Steel	316 Stainless Steel	316 Stainless Steel	316 Stainless Steel
O'ring	NBR (Nitrile)	NBR (Nitrile)	NBR (Nitrile)	NBR (Nitrile)
Flow Rate Ranges (litres per minute/US gallons per minute)
Above 5 CPS	1 to 30 / 0.26 to 8	1 to 30 / 0.26 to 8	1 to 30 / 0.26 to 6.60	1 to 30/ 0.26 to 8
Below 5 CPS	3 to 25 / 0.8 to 6.60	3 to 25 / 0.8 to 6.60	3 to 25 / 0.8 to 6.60	3 to 25 / 0.8 to 6.60
Accuracy within (of reading)	+/- 0.5%	+/- 0.5%	+/- 0.5%	+/- 0.5%
Repeatability	0.03%	0.03%	0.03%	0.03%
Maximum Viscosity (of standard model)	1000 Centipoise	1000 Centipoise	1000 Centipoise	1000 Centipoise
Maximum Operating Temperature	5500kPa/ 800 PSI/ 55 BAR	5500kPa/ 800 PSI/ 55 BAR	5500kPa/ 800 PSI/ 55 BAR	5500kPa/ 800 PSI/ 55 BAR
Pulser Type	Hall Effect or Reed Switch or Combination HE / RS	Hall Effect or Reed Switch or Combination HE / RS	Hall Effect or Reed Switch or Combination HE / RS	Hall Effect or Reed Switch or Combination HE / RS
Pulses per litre/US Gallon	81 OR 162 / 306.6 0R 613.2	81 OR 162 / 306.6 0R 613.2	81 OR 162 / 306.6 0R 613.2	81 OR 162 / 306.6 0R 613.2
Model Dimensions
Meter Body	112mm dia x 125mm h 4.41" dia x 4.92" h	112mm dia x 125mm h 4.41" dia x 4.92" h	112mm dia x 125mm h 4.41" dia x 4.92" h	112mm dia x 125mm h 4.41" dia x 4.92" h
Port Face to Face	125mm / 4.92"	125mm / 4.92"	125mm / 4.92"	125mm / 4.92"
Weight	1.8kg / 3.96lbs	1.8kg / 3.96lbs	2.9kg / 6.39lbs	2.9kg / 6.39lbs
Max. Operating Temperature	80°C / 176°F	120°C / 248°F	80°C / 176°F	120°C / 248°F
Recommended Mesh Strainer Size	60 Mesh	60 Mesh	60 Mesh	60 Mesh

M7 Series - 1" Flow Meter - SUPER ACID PROOF METER

The M7 series is the meter of choice for low cost metering of acids or water based liquids.

Prices from £335.00

Optional features include:

• Dual pulse output
• Analogue output
• High viscosity rotors (up to1,000,000 Centipoise)
• High temperature version available
• Head mounted or remote LCDs
• IS versions available
•  

> M1 0.03to 1.6 Litres/min

> M2 0.25 to 8.3 Litres/min

> M4 1 to 30Litres/min

> M10 6 to 120 Litres/min

> M40 10 to 250 Litres/min

> M50 15 to 350 Litres/min

> Accessories

> Displays

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Model

M7APP-X

Meter Type

Pulse

Meter Body Material

PPS

Wetted Components

Rotor Material

PPS

Shafts

PPS

O'ring

VITON

Flow Rate Ranges litres per minute

Above 5 CPS

3 to 80 L/min

Below 5 CPS

8 to 70 L/min

Accuracy within (of reading)

+/- 0.5%

Repeatability

0.03%

Maximum Viscosity (of standard model)

1000 Centipoise

Maximum Operating Temperature

5500kPa/ 800 PSI/ 55 BAR

Pulser Type

Hall Effect or Reed Switch or Combination HE / RS

Pulses per litre

52 OR 104

Model Dimensions

Meter Body

100mm dia x 120mm h

Port Face to Face

108mm / 4.92"

Weight

0.9kg

Max. Operating Temperature

80°C

Recommended Mesh
Strainer Size

60 Mesh

M10 - 1" Flow Meters

The M10 series are the small to medium capacity meters in the Macnaught range. They have the ability to handle a wide range of fluid viscosities with exceptional levels of repeatability and durability. EEx d Certified

Optional features include:

• Dual pulse output
• Analogue output
• High viscosity rotors (up to1,000,000 Centipoise)
• Head-mounted Rate/Totaliser and Batch controller LCD Display (EEx ia option)
• Mechanical register option
•  
• 

> M1 0.03 to 1.6 Litres/min

> M2 0.25 to 8.3 Litres/min

> M4 1 to 30 Litres/min

> M7 3 to 80 Litres/min

> M40 10 to 250 Litres/min

> M50 15 to 350 Litres/min

> Accessories

> Displays

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Model	M10ARE-X	M10ASE-X	M10SRE-X	M10SSE-X	M10BRE-X
Meter type	Pulse with delux LC display	Pulse with delux LC display	Pulse with delux LC display	Pulse with delux LC display	Pulse with delux LC display
Meter body material	AA601 Aluminium	AA601 Aluminium	316 Stainless steel	316 316 Stainless steel	Bronze
Wetted components:
Rotor Material	PPS	316 Stainless steel	PPS	316 Stainless steel	PPS
Shafts	316 Stainless steel	316 Stainless steel	316 Stainless steel	316 Stainless steel	316 Stainless steel
O'Ring	NBR (Nitrile)	NBR (Nitrile)	NBR (Nitrile)	NBR (Nitrile)	NBR (Nitrile)
Flow Rate Ranges (litres per minute/US gallons per minute)
Above 5 CPS	6 to 120 / 1.6 to 32	6 to 120 / 1.6 to 32	6 to 120 / 1.6 to 32	6 to 120 / 1.6 to 32	6 to 120 / 1.6 to 32
Below 5 CPS	10 to 100 / 2.6 to 26	10 to 100 / 2.6 to 26	10 to 100 / 2.6 to 26	10 to 100 / 2.6 to 26	10 to 100 / 2.6 to 26
Accuracy within (of reading)	+/- 0.5%	+/- 0.5%	+/- 0.5%	+/- 0.5%	+/- 0.5%
Repeatability	0.03%	0.03%	0.03%	0.03%	0.03%
Maximum viscocity of standard model	1000 Centipoise	1000 Centipoise	1000 Centipoise	1000 Centipoise	1000 Centipoise
Maximum operating pressure	5500kPa/ 800 PSI/ 55 BAR or flange rule where fitted
Pulser type	Reed switch or combination HE / RS	Reed switch or combination HE / RS	Reed switch or combination HE / RS	Reed switch or combination HE / RS	Reed switch or combination HE / RS
Pulses per litre/ US gallon	36 /136.3	36 /136.3	36 /136.3	36 /136.3	36 /136.3
Max. operating temperature	80°C / 176°F	120°C / 248°F	80°C / 176°F	120°C / 248°F	80°C / 176°F
Recommended mesh strainer size	60 Mesh	60 Mesh	60 Mesh	60 Mesh	60 Mesh

M40 - 1.5" Flow Meters

The M40 series are medium capacity meters in the Macnaught range. They have the ability to handle a wide range of fluid viscosities with exceptional levels of repeatability and durability. EEx d Certified

Optional features include:

• Dual pulse output
• Analogue output
• High viscosity rotors (up to1,000,000 Centipoise)
• Head-mounted Rate/Totaliser and Batch controller LCD Display (EEx ia option)
• Mechanical register option
•  
• 

> M1 0.03 to 1.6 Litres/min

> M2 0.25 to 8.3 Litres/min

> M4 1 to 30 Litres/min

> M7 3 to 80 Litres/min

> M10 6 to 120 Litres/min

> M50 15 to 350 Litres/min

> Accessories

> Displays

> Top of page

Model	M40ARP-X	M40ASP-X	M40SRP-X	M40SSP-X
Meter type	PULSE	PULSE	PULSE	PULSE
Meter body material	AA601 Aluminium	AA601 Aluminium	316 Stainless steel	316 Stainless steel
Wetted components
Rotor material	PPS	316 Stainless steel	PPS	316 Stainless steel
Shafts	316 Stainless steel	316 Stainless steel	316 Stainless steel	316 Stainless steel
'O'Ring	NBR (Nitrile)	NBR (Nitrile)	NBR (Nitrile)	NBR (Nitrile)
Flow rate ranges (litres per minute/US gallons per minute)
Above 5 CPS	10 to 250 / 2.6 to 66	10 to 250 / 2.6 to 66	10 to 250 / 2.6 to 66	10 to 250 / 2.6 to 66
Below 5 CPS	15 to 235 / 4 to 62	15 to 235 / 4 to 62	15 to 235 / 4 to 62	15 to 235 / 4 to 62
Accuracy within (of reading)	+/- 0.5%	+/- 0.5%	+/- 0.5%	+/- 0.5%
Repeatability	0.03%	0.03%	0.03%	0.03%
Maximum viscosity of standard model	1000 Centipoise	1000 Centipoise	1000 Centipoise	1000 Centipoise
Maximum operating pressure	5500kPa/ 800 PSI/ 55 BAR or flange rule where fitted
Pulser type	Hall effect or Reed switch or combination HE / RS	Hall effect or Reed switch or combination HE / RS	Hall effect or Reed switch or combination HE / RS	Hall effect or Reed switch or combination HE / RS
Pulses per litre/US gallon	14.5 OR 29 / 54.9 0R 109.8	14.5 OR 29 / 54.9 0R 109.8	14.5 OR 29 / 54.9 0R 109.8	14.5 OR 29 / 54.9 0R 109.8
Maximum operating temperature	80°C / 176°F	120°C / 248°F	80°C / 176°F	120°C / 248°F
Recommended mesh strainer size	60 Mesh	60 Mesh	60 Mesh	60 Mesh

M50 - 2" Pulse Meters

> M1 0.03 to 1.6 Litres/min

> M2 0.25 to 8.3 Litres/min

> M4 1 to 30 Litres/min

> M7 3 to 80 Litres/min

> M10 6 to 120 Litres/min

> M40 10 to 250 Litres/min

> Accessories

> Displays

> Top of page

The M50 series are the high capacity meters in the Macnaught range. They have all the benefits of the smaller models with extra mechanical options.

Model	M50ARP-X	M50SRP-X
Meter Type	Pulse	Pulse
Meter Body Material	AA601 Aluminium	316 Stainless Steel
Wetted Components
Rotor Material	PPS	PPS
Shafts	316 Stainless Steel	316 Stainless Steel
O'ring	NBR (Nitrile)	NBR (Nitrile)
FlowRate Ranges (litres per minute/US gallons per minute)
Above 5 CPS	15 to 350 / 3.96 to 92.46	15 to 350 / 3.96 to 92.46
Below 5 CPS	30 to 300 / 7.93 to 79.25	30 to 300 / 7.93 to 79.25
Accuract within (of reading)	+/- 0.5%	+/- 0.5%
Repeatability	0.03%	0.03%
Maximum Viscosity (of Standard Model)	1000 Centipoise	1000 Centipoise
Maximum Operating Pressure	As per flange rule	As per flange rule
Pulser Type	Hall Effect or Reed Switch or combination HE / RS	Hall Effect or Reed Switch or combination HE / RS
Pulses per litre/US Gallons	6.68 / 25.29	6.68 / 25.29
Max. Operating Temperature	80°C / 176°F	80°C / 176°F
Recommended Mesh Strainer Size	60 Mesh	60 Mesh

Accessories

> M1 0.03 to 1.6 Litres/min

> M2 0.25 to 8.3 Litres/min

> M4 1 to 30 Litres/min

> M7 3 to 80 Litres/min

> M10 6 to 120 Litres/min

> M40 10 to 250 Litres/min

> M50 15 to 350 Litres/min

>Displays

> Top of page

Optional O'rings

Various optional O'Rings are available for the M Series range to allow the flowmeters to have maximum flexibility in most applications.
For the M1 and M2, both EPDM and Teflon encapsulated O'Rings are available. The M4, M10, M40 and M50 are available with Viton, EPDM and Teflon encapsulated O'Rings.

Optional - High Temperature Rotors

For fluid temperatures above 80°C/176°F and up to 120°C/248°F, operators may select 'high temperature' rotors. This option only applies for the PPS rotor models of the M4, M10, M40 and M50 as meters fitted with stainless steel rotors are capable of handling temperatures up to 120°C/248°F. (Except mechanical version which are limited to 80°C/176°F).

Optional - High Viscosity Rotors

For fluids above 1000cps, viscosity, optional high viscosity PPS or stainless steel rotors can be specified for M4, M10, M40 and M50 (PPS only) models. If necessary consult your local distributor for additional technical assistance as the flow rate will vary in accordance with fluid viscosity (See page 26).

Optional - Hall Effect Sensor

The M4, M10, M40 and M50 pulse models can be optionally fitted with two digital output Hall Effect Switches to eliminate oscillation (pulse bounce) experienced with standard reed switches.
The HE Switches are 3-wire solid state NPN output devices with 4.5 - 24-volt DC supply voltage ratings. A common power supply must be used.
Note: When Hall Effect Sensors are fitted, only the lesser pulse output is available although the two sensors can be used for dual outputs. A single Hall Effect Sensor is standard on M1 and M2 models.

Optional - Solvent Kit (Mechanical display meters only)

Mechanical versions of the M10, M40 and M50 aluminium models can be fitted with a special seal kit for use with most common solvents. This kit is standard on all stainless steel mechanical models.

Optional - Hastalloy C Shafts

Special Hastalloy C Shafts are available for the M1 and M2 PPS body meters for use with extremely aggressive chemicals.

Accessory - Extended Life Battery

DELUXE LC DISPLAY ONLY
A silicon protection boot is available when the meter is used in an aggressive atmosphere. Accessory part number is B500.

Accessory - Head Mounted or Remote Mounted LC Displays

These displays can be head mounted on to M-Series pulse meters originally supplied without a display, or supplied with mounting brackets and mounted remotely. They can be connected also to the auxiliary pulse output of a local display meter for use as a second remote display. Accessory part numbers are F500 (deluxe version EEx ia Rate/Total + batching facilities) and G500 (standard version Rate/Total + Re-set)

DELUXE LC DISPLAY ONLY
The service life of the battery supplied in the deluxe display is approximately one year.

This replacement Lithium 3-volt (CR123A) extended life battery will approximately double the service period but the "intrinsically safe" feature will be lost. Accessory part number is L500.

Displays

> Standard LC Display

> Deluxe LC Display

> Mechanical Display

> Meters

> Accessories

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Standard LC Display

> Deluxe LC Display

> Mechanical Display

> Meters

> Accessories

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The standard LC Display is available on specific M4, M10, M40 and M50 series models. It is also available as an accessory so it can be used as a remote mounted display for any M Series meter model supplied without a display e.g. M1, M2, M10 etc.

Features

• 8 Digit x10mm/ 3/8" Liquid Crystal Display.
• Display can be rotated in 90° steps.
• Flow rate display in litres or US gallons (according to model selected).
• 2 total displays - resettable and non-resettable, up to 999,999.99 litres or US gallons (according to model selected).
• Factory set calibration constant (K factor).
• Long life 9-volt Lithium battery.
• Pulse output for ancillary equipment.

Deluxe LC Display

> Standard LC Display

> Mechanical Display

> Meters

> Accessories

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The deluxe LC Display is available on specific M4, M10, M40 and M50 series models. It is also available as an accessory so it can be used as a remote mounted display for any M Series meter model supplied without a display e.g. M1, M2, M10 etc.

Features

• 7 Digit x 12.7mm (1/2") Liquid Crystal Display.
• Display can be rotated in 90° steps.
• Selectable flow rate display in litres or US gallons.
• 2 total displays.
• Up to 999,999.9 litres or US gallons (resettable).
• Pre-settable batch control function up to 9,999 units (99.99, 999.9 or 9,999 optional settings).
• 10 preset batch quantity storage capacity.
• 3 digit cycle counter for batch dispensed.
• Single or two stage valve actuation output to be used with appropriate trip amplifier.
• Factory set calibration constant (K Factor).
• Additional 9 calibration constants (K Factors) available for "in-the-field" settings.
• Up to 9,999,999 litres or US gallons (non-resettable).
• Pulse output for ancillary equipment.
• Long Life 3-volt Lithium / CR2040 battery. (Extended life battery available as an option - see page 22).
• Approved for hazardous locations (standard battery only) EEx ia IIC T6 (PTB nr. Ex-93.C 4033X).

Mechanical Display

> Standard LC Display

> Deluxe LC Display

> Meters

> Accessories

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The Mechanical Display is available on specific M4 M10 M40and M50 Series meter models.

Features

• Litre or US gallon display (according to model selected).
• Two Total displays; - 1 to 9,999 litres or 1/10 to 999.9 US gallons (Resettable) - 1 to 999,999 litres (X10) or 1 to 999,999 US gallons (Non-Resettable).
• Push button reset.
• Display can be rotated in 90° steps.