DataChart® 1250 Series 2-Channel Paperless Recording Tachometer

DataChart ® DC1250 2-Channel Paperless Recording Tachometer
The DC1250 is a feature rich digital recording system offering 2 universally configurable isolated inputs. When configured as a Recording Tachometer the DC1250 will accept TTL signals from Monarch Speed Sensors or a standard 0-5V TTL pulse from your sensor.

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  • 2 Channels
  • 5 to 600,000 RPM
  • Accepts Monarch Speed Sensors
  • Accepts 0-5V TTL pulse from any Sensor
  • Record Rates to 100 samples/sec.
  • Store data on CompactFlash™ Cards up to 2 gigabytes
  • Review data with Navigator Software or "one-click" to Excel
  • 4 internal alarm set points, 2 alarm relay outputs and 1 digital control input are all standard
  • Optional internal re-chargeable battery allows battery-powered for up to eight hours
  • Optional USB port
Monarch Instrument Speed Sensors (partial list)
Remote Optical Speed Sensor

Optical Sensors our most popular sensor

1-250,000 RPM. The most versatile and popular sensors we make. The ROS-W (tinned wire termination) and ROS-P (1/8" phone plug termination) are threaded stainless steel remote optical sensors with a visible red LED light source. All these sensors have the "on-target" green LED indicator.

Magnetic Speed Sensor

Magnetic Sensor with Amplifier Module

1-99,999 RPM. MT-190 has an amplifier extends the operating gap to 0.25 inches (6.35mm) from the target. Frequently used on gears, the MT-190W provides a 0-5V TTL output signal. The DC1250 will power the sensor.

Infrared Speed Sensor

Infrared Sensor

1-999,990 RPM. Both the IRS-P and IRS-W are proven to be reliable high speed sensors. With a working range of 12 to 25 mm from very high speed equipment or an application providing contrasting light and dark surfaces.

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DataChart Navigator Software

DataChart Navigator software makes reviewing, printing and exporting data easier than ever. Simply start the program, double click the data file and Navigator does the rest. Your data file is displayed in one graphic window complete with the scales as programmed in the DC1250 as well as Date and time stamps. You can expand, compress or use the box zoom to display specific areas of data as needed. The print preview feature allows review prior to printing.

Exporting data is as simple as clicking the Excel™ Icon in the Data table export window. Navigator automatically converts the historic data, starts up Excel™ and loads your data into an organized spreadsheet.

Minimum system Requirements: PC running Windows® 2000 or XP, 10 MB free disk space and CD ROM Drive.

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Versatile Power
Paperless Recorder Batteries

The DC1250 is supplied with a universal wall transformer power supply (North American plug) that can operate from 100 to 240Vac 50/60Hz. An optional transformer with an interchangeable plug set is available.

An isolated input power of 12-24Vdc is also available for use with instrument power supplies or external batteries. The DC1250’s real time clock and internal RAM have a battery back-up to preserve data in the event of a power loss.

If losing data during a power outage is a concern, the user can add the rechargeable battery pack option. With the battery pack option installed, the DC1250 automatically keeps the rechargeable NiMH batteries charged to capacity. In the event of a power loss, the DC1250 automatically switches over to internal battery power. All functions continue to operate as normal for up to 8 hours! This option is also great for using the DC1250 in areas where no AC or DC power is available.

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 Ordering Information  Contact Monarch at 800-999-3390 or send us an e-mail.

Item No.


DC1250 -S 000

2 Channel Digital Recorder with standard 100-240 VAC wall adapter with North American plug

Option -U

Universal AC power Adaptor with interchangeable Plug Set (instead of – S in Part Number)

Option -D

DC Input power 12-24 VDC (instead of – S in Part Number)


Re-chargeable NiMH Battery Pack for Backup/Operation (Not available with Option -D )


Windows compatible software for graphic analysis, printing, transfer and exporting


USB 2.0 Front Panel Port


CompactFlash™ Reader USB 2.0 compatible


250 Ohm Precision Resistor for current inputs. 0.1% 0.5 watt


64 Megabyte CompactFlash™ Memory Card


128 Megabyte CompactFlash™ Memory Card


256 Megabyte CompactFlash™ Memory Card




Temperature/Humidity Sensor with 8 foot cable


Remote Optical Sensor with 8 foot cable, mounting bracket and 12 inches of reflective tape


Magnetic Trigger Sensor/Amplifier with 8 foot cable


Infrared Sensor with 8 foot cable tinned wires and mounting bracket