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Monarch Instruments Tach-4A Multi-Function Tachometer
Our Price: Item has been discontinued
Item Number: 6100-
Manufacturer: Monarch Instruments
Part Number: 6100-
Product Options
* denotes required field
Monarch Tach4A Model Selection*
NIST Traceable Calibration - Tachometer/Strobe*
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Monarch Instruments Tach-4A Multi-Function Tachometer

The innovative non-contact Tach-4A is the first portable optical instrument to combine a high accuracy, wide range Tachometer, multi-function Totalizer/Counter and a Timer (Stopwatch). Remains one of the most accurate portable tachometers available.
Tach-4A is menu programmable from a six button membrane keypad. A unique scaling feature allows Tach-4A to function from one or multiple pulses per revolution as a tachometer, ratemeter and totalizer/counter displaying data in engineering units. The optional 0-5V TTL compatible Pulse Output (PO) is supplied with a cable for BNC interface to vibration data collection or other equipment. Tach4A is available with a remote sensing capability. Monarch offers a full line of remote sensors including optical, infrared, magnetic or laser.
Features:
- Four Functions:
• Tachometer
• Counter
• Totalizer
• Timer
- 5 to 500,000 RPM
- Accuracy/Resolution to.0001 RPM
- Non-Contact Operation to 3 Feet and 45° from Target
- Internal or Remote Sensing
- Max, and Min Recall
- Autoranging and Self Testing

Order the Tach 4A Kit for a complete Package
Technical Specifications:
| Range |
Accuracy |
Resolution |
| 5.0000 - 9.9999 |
+/- 0.0001 |
0.0001 |
| 10.000 - 99.999 |
+/- 0.001 |
0.001 |
| 100.00 - 999.99 |
+/- 01 |
0.01 |
| 1000.0 - 9999.9 |
+/- 0.01 |
0.1 |
| 10,000 - 99,999 |
+/- 1.0 |
1.0 |
| 100,000 - 500,000 |
+/- 0.001 |
1.0 |
| Speed Range: |
5 RPM to 500,000 RPM |
| Counter Totalizer Range: |
1-999,999 counts |
| Timer (Stopwatch) Range: |
Autoranging in Hrs., Min. Sec., 0.01 Sec. to 100 Hrs |
| Recall: |
Last Reading Held in Memory for 1 Min. Auto Turn Off Max/Min Recall |
| Self-Test Program: |
Verifies Display, Internal Timebase, Reset Battery Check Switches
to Standby Mode Upon Completion |
| On Target Indication: |
Yes, Bullseye Symbol Confirms TACH-4A Locked On |
| Optical System: |
Single Lens Reflex Visible Light Source |
| Operating Envelope: |
Range: 0 to 3 Feet (1M) from Target
Angle: Up to 45 Deg from Rotational Axis of Reflective Target |
| Display: |
6-Digit LCD, 0.44" Characters - Backlighted |
| Controls: |
6-Switch Keyboard, Tactile Membrane Switches. MENU Selections |
| Power Source: |
(4) "AA" Alkaline Batteries Supplied Optional Rechargeable Batteries |
| Size: |
6.1"H x 3.54W x 1.3"D (155 x 90 x 33mm) |
| Weight: |
1 lb (.45kg) Including Batteries and Standard Accessories |
| ITEM NO. |
MODEL |
DESCRIPTION |
| 6100-010 |
Tach-4A |
Digital Programmable Tachometer/Totalizer/Counter and Timer/Stopwatch - 5 to 500,000 RPM, with 4 "AA" Alkaline batteries, 12 inches of reflective tape and padded carrying case |
| 6100-011 |
Tach-4A Kit 115 |
Tach-4A with 4 "AA" NiCad batteries, R-5 (115 Vac) recharger and 5 foot roll of reflective tape in latching carrying case |
| 6100-012 |
Tach-4A Kit 230 |
Same as Tach-4A Kit 115, but with R-6 (230 Vac) recharger |
| 6100-020 |
Tach-4AR |
Digital Programmable Tachometer/Totalizer/Counter and Timer/Stopwatch - 5 to 500,000 RPM, with internal optics and connector for optional remote sensors, 4 "AA" Alkaline batteries, 12 inches of reflective tape and padded carrying case |
| 6100-021 |
Tach-4AR Kit 115 |
Tach-4AR with 4 "AA" NiCad batteries, R-5 (115 Vac) recharger, 5 foot roll of reflective tape and ROS-5P sensor in latching carrying case |
| 6100-022 |
Tach-4AR Kit 230 |
Same as Tach-4AR Kit 115, but with R-6 (230 Vac) recharger |
| 6100-040 |
Tach-4AR PO |
Digital Programmable Tachometer/Totalizer/Counter and Timer/Stopwatch - 5 to 500,000 RPM, with internal optics and connector for optional remote sensors, TTL Pulse Output and 6 foot cable with BNC connector, 4 "AA" Alkaline batteries, 12 inches of reflective tape and padded carrying case |
| 6100-041 |
Tach-4AR PO Kit 115 |
Tach-4AR PO with 4 "AA" NiCad batteries, R-5 (115 Vac) recharger, 5 foot roll of reflective tape and ROS-5P sensor in latching carrying case |
| 6100-042 |
Tach-4AR PO Kit 230 |
Same as Tach-4AR PO Kit 115, but with R-6 (230 Vac) recharger |
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Our Price: Select Size for Price
Hard Instrument Carry Case with Pluck Foam to fit your instruments. 100's of sizes & styles available. Call for Details
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Reflective Tape for any non-contact photo tachometer, One 5 foot strip, 0.5
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Remote Optical Sensor (ROS) with cable, mounting bracket and 12" reflective tape with (1/8") 3.5mm stereo phone plug termination
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Infrared Sensor with 8' cable, (1/8") 3.5mm stereo phone plug termination and mounting bracket
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Magnetic Tiggered Sensor with amplifier and (1/8") 3.5mm stereo phone plug termination
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