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The Professional’s Choice for over 40 years!

Monarch Instrument is the premier supplier of rotational speed measuring instruments and stroboscopic inspection equipment. Our comprehensive lines of precision products and calibration services make Monarch the professional’s choice for

Stroboscopes  ●  Tachometers  ●  Data Loggers 

Optical and Speed Sensors  ●  Data Acquisition Systems


Thank you so much for your help. Based upon my recommendation, the Amazon facility where I work has purchased another of the PLS strobes. As an Electrical Engineer, I rate your PLS unit as the best I've used.

Jim V., Amazon Fulfillment Center, Fife WA

After retiring an older Dickson logger due to incompatibility with win 10, I picked up this logger (Track-It Pressure/Temp, Vac/Temp Data Logger with Display) and found it superior in every way. No leaks, great software and excellent battery life.

Donnie H. • Montgomery County KS Rural Water District No. 8


I have only started using this [Track-it™ Rugged Temp Data Logger] a short time, and this is the best thing that I have seen. The data logger works incredibly well, and the pricing can't be beat! As soon as I have a few validation runs to see how it works under pressure, I will re-review.

Scott K. •


I bought this tachometer several years ago and have found it to be a great tool for measuring RPM (I use it for fire pump testing) and it's easy to use and maintain. It's a great buy for the price!

M. Blair •


I use this [SPSR Self-Powered Sensor] all the time for RPM measurements for powertrain NVH testing. The ROS-P is good, but needs a fairly large target pulse width, on the order of 1 cm. I recommend checking out the ROLS-P if you need many pulses on a small-diameter target. I also use the magnetic sensor and it works well with a contact wheel in case you cannot get good optical location for whatever reason. I have used these for 20 years and like them.

Jason K. •