Rate, frequency, total, quadrature, period and speed panel meters

The meters and controllers on this page accept pulse inputs from such sensors as NPN, PNP proximity switches, rotary encoders etc. All can be easily scaled to read in RPM, frequency, metres per minute, litres per hour etc..

Suited for these applications and more:-

• Engine speed in RPM
• Period and bake-time display
• Production line counting and rate measurement
• Conveyor speed in metres per minute, feet per second etc.
• Production line output speed, such as items per hour
• Generator frequency, such as 40.000 to 70.000 Hz
• Angle measurement, using quadrature encoder input
• Any physical variable represented by a variable frequency

This page has 2 models for you to choose from:-

[INT2-C] [MAXI-INT2-C]

[^] Model INT2-C digital panel meter
The INT2-C is a low cost yet highly precise, stable, flexible and easy to use 1/8 DIN scalable counter and frequency / RPM / Speed display, and our top seller, for both display-only and display + output applications. It has a number of useful plug-in options which make it ideal in many control and monitoring applications. The front panel buttons can be locked, and there is an optional plain front panel with no buttons, which can be put in place of the standard front, after calibration. If you need to be able to read the display in a reflection, for example in a heads-up display system, you can switch it to display a mirrored image. Interesting fact The INT2 is the latest release of this well established display, which was first sold 12 years ago. The fact that it is still a popular seller after all these years is proof that it is 'right' for the job. We designed it, we build it, we know it inside out, so you can count on us for first class support. Plus... You can now order this display with digits up to 400mm high! Exactly the same well-proven software and hardware, but with digits of 57mm, 102mm, 150mm, 200mm, 300mm or 400mm high. Ideal for large factories, or anywhere where you need to see your important measurements from far away, inside or outside. The large version is known as the Fusion family, sealed IP65 all round. See here.
See operating Manual (new Mk2 version)
See operating Manual (old Mk1 version)
See datasheet
See model number & pricing calculator
INT2-C Specifications
Approvals	Available as UL and cUL listed on request. Open Type, Process Control Equipment, listing number 39CP, File E317722 Produced to IPC 610 Class 2 Standard UL ISO9001:2008 QA CERT.
Input connections	Up to 4 pulse input ports plus sensor excitation output.
Input Signals	Configurable for :- Contact closure NPN PNP Quadrature Contact closure 24V Pulses 5V pulses Programmable debounce filter to eliminate false counting from contact bounce. When in totaliser mode, the meter can add together and scale counts from up to 4 independent input signals.
Excitation	24V DC up to 100mA, to power input sensor.
Digits	6 digits, 14mm high. Legible up to 7 metres away. 10 readings per second. Variable brightness from front panel.
Digit colour	Red - standard. Green - optional
Scaling	Digital menu-free system, fully scalable with selectable decimal point position. In addition, a separate Offset and Scale variables allow you to convert the reading, without affecting calibration. For example from kg to pounds, litres to gallons etc.
Filtering	Adjustable 0 to 25 Seconds
Front panel controls	Calibration, Tare, Reset, Max/Min, Alarms
Power	100-240 VAC std, 11-30VDC option. 10VA Power burden, max.
Accuracy	+/-0.05% of range
Thermal stability - range	+/- 15ppm/oC
Thermal stability - offset	+/- 0ppm/oC
Analogue output	Optional plug-in 16 bit module Linearity +/- 0.02% of range 0-20/4-20mA into 0 to 500 Ohms Resolution 0.4uA 0-10V into loads >600 Ohms Resolution 0.2mV -10 to+10V into loads >600 Ohms Resolution 0.4mV Accuracy 0.1%of range Stability 50ppm/C Fully isolated from input and power Fully scalable with digital precision Special features Forward and reverse action possible Can be set to operate from nett or gross value.
Alarm output	Optional plug-in relay SPST modules 2 Alarms rated 5A 250VAC, SPST 4 Alarms rated 2A 250VAC, SPST Selectable normally open or normally closed Optional plug-in relay SPDT modules 2 Alarms rated 5A 250VAC, SPDT Optional plug-in solid state modules 2 Alarms rated 50V 100mA DC. Adjustable hysteresis In-flight compensation facility. Energise or de-energise on trip Special features Adjustable timers to set energise and de-energise delays. Can also be set to pulse for applications needing less than 100% duty cycle. In-band and out-of-band alarm function. Manual and automatic in-flight compensation. Can be set to operate from nett or gross value.
Serial data output	Optional plug-in modules. RS232 RS485 Addressable On demand or continuous output. Special features Can include time and date with RTC option fitted. Can be set to operate from nett or gross value.
Logic inputs	3 logic inputs, individually configurable for Hold, Reset, Tare, Peak/valley, Nett/Gross Normally open, NPN or contact closure input to activate. 5V open circuit, 1mA switched current.
Real time clock option	Accuracy better than 2 minutes per year. Allows date and time to be included in serial data, for example for printing time-stamped records. Automatic summer/winter time correction for Europe and USA Battery backup to maintain timing whilst switched off. Type = CR1620 3V Lithium
Environmental	Storage -20 to +70C Operating 0 to 50C Non condensing. Optional IP67 cover SPC4
Connectors	Detachable screw terminals
Bezel size	96mm wide x 48mm high. 13mm forward.
Panel cutout	92mm wide x 45mm high. +1mm, -0mm
Depth behind panel	125mm including connectors + cable.
Sealing	IP65 standard, IP67 with optional SPC4 cover

[^] Model MAXI-INT2-C large format panel meter
The MAXI-INT2-C is a larger format version of the INT2-C digital meter. This gives improved visibility and larger buttons. It has a number of useful plug-in options which make it ideal for use in many control and monitoring applications. The display can be configured to appear as a mirror image, so that it appears legible when viewed as a reflection. You can also set the unit to 'beginner' mode when setting it up, which gives you more time to read the manual, without the meter timing out and going back to measurement mode.
See datasheet
See model number & pricing calculator
MAXI-INT2-C Specifications
Approvals	Produced to IPC 610 Class 2 Standard UL ISO9001:2008 QA CERT.
Input connections	Up to 4 pulse input ports plus sensor excitation output.
Input Signals	Configurable for :- Contact closure NPN PNP Quadrature Contact closure 24V Pulses 5V pulses Programmable debounce filter to eliminate false counting from contact bounce. When in totaliser mode, the meter can add together and scale counts from up to 4 independent input signals.
Excitation	24V DC up to 100mA, to power input sensor.
Digits	6 digits, 20mm high. Legible up to 13 metres away. 10 readings per second. Variable brightness from front panel.
Digit colour	Red - standard. Green - optional
Scaling	Digital menu-free system, fully scalable with selectable decimal point position. In addition, a separate Offset and Scale variables allow you to convert the reading, without affecting calibration. For example from kg to pounds, litres to gallons etc.
Filtering	Adjustable 0 to 25 Seconds
Front panel controls	Calibration, Tare, Reset, Max/Min, Alarms
Power	100-240 VAC std, 11-30VDC option. 10VA Power burden, max.
Accuracy	+/-0.05% of range
Thermal stability - range	+/- 15ppm/oC
Thermal stability - offset	+/- 0ppm/oC
Analogue output	Optional plug-in 16 bit module Linearity +/- 0.02% of range 0-20/4-20mA into 0 to 500 Ohms Resolution 0.4uA 0-10V into loads >600 Ohms Resolution 0.2mV -10 to+10V into loads >600 Ohms Resolution 0.4mV Accuracy 0.1%of range Stability 50ppm/C Fully isolated from input and power Fully scalable with digital precision Special features Forward and reverse action possible Can be set to operate from nett or gross value.
Alarm output	Optional plug-in relay SPST modules 2 Alarms rated 5A 250VAC, SPST 4 Alarms rated 2A 250VAC, SPST Selectable normally open or normally closed Optional plug-in relay SPDT modules 2 Alarms rated 5A 250VAC, SPDT Optional plug-in solid state modules 2 Alarms rated 50V 100mA DC. Adjustable hysteresis In-flight compensation facility. Energise or de-energise on trip Special features Adjustable timers to set energise and de-energise delays. Can also be set to pulse for applications needing less than 100% duty cycle. In-band and out-of-band alarm function. Manual and automatic in-flight compensation. Can be set to operate from nett or gross value.
Serial data output	Optional plug-in modules. RS232 RS485 Addressable On demand or continuous output. Special features Can include time and date with RTC option fitted. Can be set to operate from nett or gross value.
Logic inputs	3 logic inputs, individually configurable for Hold, Reset, Tare, Peak/valley, Nett/Gross, Memory Address Normally open, NPN or contact closure input to activate. 5V open circuit, 1mA switched current.
Real time clock option	Accuracy better than 2 minutes per year. Allows date and time to be included in serial data, for example for printing time-stamped records. Automatic summer/winter time correction for Europe and USA Battery backup to maintain timing whilst switched off. Type = CR1620 3V Lithium
Environmental	Storage -20 to +70C Operating 0 to 50C Non condensing. Optional IP67 cover SPC4
Connectors	Detachable screw terminals
Bezel size	144mm wide x 72mm high. 13mm forward.
Panel cutout	138mm wide x 67.5mm high. +1mm, -0mm
Depth behind panel	150mm including connectors + cable.
Sealing	IP54 standard, IP65 with optional SPC4-M cover