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Monarch Instrument - Model ACT-1B -Panel Tachometer
The ACT-1B Panel Tachometer is compatible with all Monarch speed sensors with tinned wire "-W" connections. It can be factory configured to meet your specifications or user-configured onsite with the optional USB Programming Cable. The USB Programming Cable and free downloadable PM Remote Software also allow real-time display and recording of data on a local PC. Optional NIST Traceable Certificate is available. For assistance in choosing power and output options, contact Monarch Instrument.
All models - universal input, non-contact operation from optical, infrared, laser, proximity, and magnetic sensors or direct TTL and 3.3 to 50 V ac signals
ACT-1B Panel Tachometer
- Economically priced
- 1/8 DIN sized
- 5-digit LED display
- 5 to 99,999 RPM range
- Universal sensor inputs
- Compatible with most speed sensors
- User-configurable*
- View real-time data on PC*
- Store data in Excel File in real-time*
- Universal AC power 100-240 V ac, 50/60 Hz or optional dc input power
- Optional 4-20 mA or 0-5 V dc scalable output
*Requires optional USB programming cable and free downloadable PM Remote Software.
- Speed Range: 5 to 99,999 RPM
- Accuracy: ±1 RPM or 0.005% of reading
- Resolution: 1 RPM (user-programmable to 0.0001†)
- Display: 5-digit, 0.56 in. [14 mm] high red LED
- Display Update: Twice per second above 120 RPM (user-programmable to 0.5, 1 or 1.5 second†)
- Dimensions: 1/8 DIN by 4.5 in. [114 mm] deep Panel cutout: 3.58" x 1.74" [91 x 44 mm]
- Power Supply: Standard: 100-240 V ac ±10%, 50/60 Hz,
- Optional: 12 or 24 V dc ±10%, Isolated, 5.0 Watts
- Inputs: Universal input for optical, proximity, two-wire, or three-wire magnetic, infrared, or laser sensors
- TTL input or 2 V ac to 50 V ac peak to peak input
- Standard input is 1 pulse per revolution (user-programmable from 1 to 999†)
- Sensor Excitation:
- 12 V dc at 20 mA for proximity sensors,
- 12 V dc at 75 mA for all other sensors;
- Optional 5 or 24 V dc available
- Recommended Sensors:
- Optical - ROS-W, ROS-HT-W-25
- Proximity - P5-11
- Magnetic - M-190W or MT-190W
- Infrared - IRS-W
- Laser - ROLS-W or RLS-W
- IO Option: 4 to 20 mA out, 16-bit resolution 12 V dc compliance voltage Full-scale RPM settings as specified when ordered (user-programmable†)
- Analog Output (option):
- 0 to 5 V dc, 5 mA 16-bit resolution
- Full-scale RPM settings as specified when ordered (user-programmable†)
- PO (option): 0 to 5 V TTL pulse, non-inverting, one pulse out for each pulse in (Positive or negative out programmable†)
- Environmental:
- This product is designed to be safe for indoor use under the following conditions (per IEC61010-1):
- Installation Category II per IEC 664
- Pollution Degree Level II per IEC 664
- Operating Temperature: 32 °F - 122 °F [0 °C - 50 °C]
- Humidity: Maximum relative humidity 80% for temperature up to 88 °F (31 °C) decreasing linearly to 50% relative humidity at 104 °F (40 °C)
- *Specifications are subject to change without notice.
- †Requires optional USB Programming Cable and 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.
Features
- 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
Click here for complete details and to download the software.

- Harmonized Tariff Code: 9029205000
- Country of Origin: US
- Export Control Classification Number (ECCN): EAR99
