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ACT-3X Panel Tachometer with NIST Traceable Certificate


Regular price $385.00 Sale


Extended Warranties are Available

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The ACT-3X Panel Tachometer is a powerful NIST calibrated, fully programmable tachometer and totalizer. It accepts inputs from all Monarch speed sensors or from any standard TTL generating device. The unit operates from 120/240 V ac input power or from 12 or 24 V dc input power (optional). Programming is easily performed through the 5 front panel pushbuttons or using the free downloadable PM Remote Software. Set up for single-channel monitoring. Programmable scale factor with menu selection for multiple pulses per revolution, linear rates, single event trip speeds (using auxiliary input), and rate of change in RPM. A TTL pulse repeater output is standard. Recommended sensors with PN -W (= tinned leads), ROS-W, ROS-HT-W-25P5-11, PS-12M-190WIRS-WROLS-W, RLS-WSLS-115/230, CSLS, and GE-200HP Gas Engine Sensor (with amplifier).



All models - Universal Input, non-contact operation from optical, infrared, laser, proximity, and magnetic sensors or direct TTL and 200 mV to 50 V ac signals

ACT-3X Panel Tachometer

  • 1/8 DIN sized
  • 5-digit LED display
  • 5 to 999,990 RPM range
  • Universal sensor inputs
  • NIST Traceable Certificate included
  • User-configurable with front panel pushbuttons or free downloadable PM Remote Software
  • View real-time data on PC*
  • Record data in .CSV format in real time*
  • Universal ac power 100-240 V ac, 50/60 Hz or optional 12 or 24 V dc power
  • Standard pulse repeater output
  • Single event capture from start-stop pulses, in units such as MPH, CM/sec, etc. using two sensors - for the linear rate of travel on the second input channel
  • Optional 4-20 mA or 0-5 V dc scalable output
  • Optional Ethernet or USB communications
  • Optional alarm relay outputs

*If no communications option is ordered, requires USB programming cable and PM Remote Software (free download)



Speed Range 5-999,999 RPM (speeds below 5 RPM possible with multiple pulses per revolution)
Input Frequency Range 0.083 Hz to 80 kHz
Totalizer/Counter Display Range: 0.001 to 99,999
Input Configuration Universal inputs: 1 to 9,999 pulses per revolution
front panel pushbutton programmable TTL input and 1.1 V to 50 V ac signals, Opt: -1 to -50 V dc
Accuracy +/-0.001% of reading or +/-1 displayed resolution (standard gate),
+/-0.06% of reading or +/-1 displayed resolution (fast gate)
Resolution Up to 0.001 RPM, 10 RPM (100,000 to 999,990 RPM)
Display 5-digit, 0.56 in. [14 mm] high red LED
Display and Output Update Menu-selectable between 0.5 seconds above 120 RPM, 1 second above 60 RPM, and 1.5 seconds above 40 RPM
Max Measurement Rate Up to 100 times per second (Standard Gate) or up to 1000 (Fast Gate) dependent on the input frequency; input must be measurement rate
Scaling Programmable scaling: 0.0001 to 9999.9 (front panel pushbutton programmable)
Decimal Point User-selectable (0-3) decimal places max (front panel pushbutton programmable)
Memory Maximum, minimum, and last reading recall from front panel pushbuttons
Dimensions 1/8 DIN by 4.5 in. [114 mm] deep
Panel cutout: 3.58 in. x 1.74 in. [91 x 44 mm]
Input Power

Standard: 100-240 V ac +/-10%, 50/60 Hz

Optional: 12 or 24 V dc +/-20%, isolated, 8VA

Inputs Universal input for optical, proximity, two-wire or three-wire magnetic, infrared, or laser sensors; TTL input or 3.3 V ac to 50 V ac input (The standard input is 1 pulse per revolution.)
Sensor Excitation 5 V dc or optional 12 or 24 V dc to sensor
Recommended Sensors


High Temp - ROS-HT-W-25

Proximity - P5-11, PS-12

Magnetic - M-190W or MT-190W

Infrared - IRS-W

Laser - ROLS-W, RLS-WSLS-115/230, CSLS

Inductive - GE200-HP Gas Engine (requires amplifier)
Pulse Repeater Output

Standard, 0 to 5 V TTL compatible; one pulse out for each pulse in

Menu-selectable polarity

Communications Bidirectional RS232C, USB, or Ethernet interface
Analog Output (optional)

Voltage (AO): 0 to 5 V dc, 5 mA max load (isolated or non-isolated) or Current (IO): 4 to 20 mA, 500 ohm,¦ max load. (or non-isolated), 1 to 5 V dc possible using 250 ohm resistor) 16-bit resolution

Front panel pushbutton programmable for full scale and offset RPM ranges

Pulse Output (optional) Repeater pulse output: TTL pulse switching between +5 V and ground
Alarm Capability

Two-alarm setpoints: High or Low
alarm limits, latching or non-latching

Front panel pushbutton programmable

Hysteresis, deadband, and low limit lockout are programmable; relays can be set as a fail-safe

Alarms can be reset manually or automatically; remote reset via the auxiliary input

Alarm Outputs Two Form C relay contacts, rated 1 A at 115 V ac or 230 V ac
Remote Programming

Remote programming is possible using an optional communications interface and PM Remote Software

(If no communications are ordered, the unit can still be programmed with an optional USB programming cable.)


Indoor use only, installation category II per IEC 664 temperature: -10 °C to 50 °C operating per IEC 61010-1

Humidity: maximum relative humidity 80% for temperatures up to 31 °C, decreasing linearly to 50% relative humidity at 40 °C

Electrical Safety Meets EN61010-1:2001, EC low voltage directive 72/23/EEC and 89/336/EEC


*Specifications are subject to change without notice.

PM Remote Software

PM Remote Software is a free downloadable Windows-based software application that allows users to quickly and easily customize the configuration of Monarch’s ACT-1B, ACT-3X, F2A1X, and F2A3X panel tachometers. Set the mode of operation to RPM, RPS, or Frequency and select the input scale (pulses per revolution). Real-time data can be displayed directly on the PC along with min and max values. Decimal places and display update rate are user-configurable.

Click here for complete details and to download the software.



  • Allows quick setup of ACT-1B, ACT-3X, F2A1X, and F2A3X
  • Display live data remotely on PC
  • Unit configuration can be saved for reloading in the feature

PM Remote Software Programmable Features


PM Remote Software Communications


Click here for complete details and to download the software.


Shipping Codes for ACT-3X Panel Tachometer (all models):

Harmonized Tariff Code:  9029205000

Country of Origin:  US

Export Control Classification Number (ECCN):  EAR99


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