The RPM250W is a compact laser Tachometer with Bluetooth® connectivity that enables building and maintenance professionals to view and share revolutions per minute (RPM) data of rotating objects directly from their mobile devices. Having the capability to capture data, display trends, set visual and audio alarms, and send reports allows users to better understand equipment health.

• Take non-contact RPM measurements of rotating objects
• Increase working distance up to 500 mm (1.64 ft) using laser guided non-contact measurement feature
• Transmit, view, and share data directly from a mobile device via Bluetooth connection to the ExView app
• Count up to 99,999 with the Counter function
• Freeze display with ‘Data Hold’
• Save battery life with Auto Power Off feature
• Mount on tripod with standard 1/4″-20 mounting screw
• View data on both the bright, backlit RPM250W LCD display and from the app on iOS® or Android™ mobile devices (offers both day mode and dark mode)
• Connect up to eight compatible Extech Connected 250W Series meters to the app simultaneously
• Set up data recording and program high/low audible alarms through the app
• Export data in .CSV file format or send PDF reports—including photos of the measurement location—from the app
• Comes complete with 3 AAA (1.5 V) batteries

ExView® App Enables Remote Data Collection and Reporting With Multiple Devices

Extech has launched a new mobile app that will make data collection and analysis easier than ever before with its 250W-Series of environmental meters – the ExView App. This app allows you to monitor a variety of environmental conditions from outside safe or hard-to-reach areas. It connects with up to eight meters at once. You will be able to monitor key readings throughout your facility and easily share them with your team whether you’re using several LT250W light meters, AN250W aneometers, or other new 250W-Series meters.

With the ExView App, you are able to read and log measurements remotely in real time. In addition, you can create detailed PDF reports that can be shared and saved. When you connect your meters to a mobile device, you can easily collect data, create graphs, and add information to customer reports. Also, you can use your smartphone or tablet for remote viewing in difficult-to-access areas or for sharing results with others.

Integration With the Extech W Series

Extech W Series meters that include Bluetooth® connectivity were designed for seamless integration with the ExView App. In addition to displaying trends, setting alarms, creating and sending reports, users can gather deeper insights on equipment and building health.

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• Make non-contact RPM measurements of rotating objects
• Use reflective tape on object to be measured and point the integral laser
• Large 5 digit LCD display with backlighting
• Memory button for Last/MAX/MIN readings
• Counter function counts up to 99,999 revolutions
• Rugged, double molded housing

Extech 461920 Tachometer Applications:

Motor speed, moving fans, pumps, and gears, propeller devices, and many other general maintenance, production, and automotive uses.

What is a Tachometer?
A tachometer is a device that measures the angular speed of a rotating shaft in terms of revolutions per minute (RPM). Also, a tachometer can measure linear speed in terms of feet per minute (feet/minute) or meters per minute.

How do Contact Tachometers Operate?
The sensor tip is placed in direct contact with the rotating object. After 2 seconds an accurate reading is displayed. Linear surface speed can also be measured by placing the edge of the wheel on the moving object.

How do Photo (Non-contact) Tachometers Operate?
First, a small piece of reflective tape (approximately 1/4-inch) is mounted on the object to be measured. Second, the light beam or laser is pointed at the revolving tape. The reflection from the tape provides a reading to be displayed and updated once per second. For the most accurate measurements, the distance between the tachometer and the reflective tape should be within 6 inches for a light beam and up to 6.5 feet for a laser. Fluorescent or bright ambient lights may interfere with the measurement.

Which Extech Tachometer Model Is the One for You?
A non-contact (photo) tachometer was designed for applications where it is not feasible to have the tachometer come in contact with the rotating device. This is the case in high-speed applications and/or where the object to be measured is not easily reached. A contact tachometer is also available for applications where direct contact of the tachometer with the object is preferred. You can also select a combination (contact/non-contact) tachometer for the maximum in flexibility.

Accessory: Reflective Tape for Photo Tachometers
For use with any brand Photo Tachometer. Place a piece of reflective tape on the object to be measured and point the tachometer’s integral light beam at it. Ten reflective tape strips. Each strip measures 585 x 6 mm.

Specifications

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The 461880 Vibration functions have a frequency sensitivity that meets ISO-2954, and measure Acceleration, Velocity and Displacement. A 1000 point datalogger allows recording of data for download to a pc with included software. The Tachometer functions provide contact RPM and Linear Surface Speed, as well as non-contact RPM measurements.

Vibration meter and laser tachometer has a unique large LCD with characters on display that reverse direction depending on the mode; contact, photo or vibration. The included Windows ® 95/98/NT/2000/XP compatible software (included) allows captured readings to be downloaded to your PC for further analysis.
Features of the Extech 461880 Vibration Meter:

The Extech 461880 vibration meter features a remote vibration sensor with magnetic adapter on a 39″(1m) cable and has a wide frequency range of 10Hz to 1kHz. The meter has an RMS and Peak Value measurement modes and manual / auto store/recall up to 1000 readings. The data hold function freezes the reading in the display. The Extech 461880 vibration has an auto shut-off saves battery life.
Features of the Extech 461880 Laser Tachometer:

The Extech 461880 laser tachometer uses a laser for greater distance non-contact measurements up to 4.9ft (1.5m) and stores last, max, and min readings.

The combination Extech 461880 vibration meter and laser tachometer ships complete with remote vibration sensor, magnetic mount, wheels for linear surface speed or RPM (cone tip and flat tip), reflective tape, 4 AA batteries, software with cable, and hard carrying case.

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