Rated 3.0 out of 5 by 1
Rated 3.0 out of 5.0 by jred Virbration meter, not a datalogger
As of the writing of this review (July 9, 2015), the description of this item on the Home Depot website is just plain wrong. While the VB400 model number is right, the description given is for an Extech VB300 datalogger, which is quite different from the VB400 vibration pen actually being sold.
What you actually get is a basic vibration meter that can measure acceleration or velocity, and you can hold the current value. If that's of interest to you, read on.
This vibration pen measures acceleration (in m/s^2, g, or ft/s^2) or velocity (in mm/s, cm/s, or inch/s). It comes with a magnetic tip installed to hold the meter on a ferrous horizontal surface that a magnet works on (basically something with iron or steel), and you can swap that tip for an included longer tip for non-ferrous surfaces. It measures the current vibration or velocity (1 second sampling time), and it has a hold button that lets you freeze the current reading. The specs say it can measure frequencies from 10 Hz to 1 kHz.
So that's pretty much what this meter does, and it seems to work fine if that is what you need. It does not have any ability to capture peak values, or do any other kind of datalogging. It just reads the current acceleration or velocity.
A bit more about the physical aspects of this meter: It is powered by four AAA batteries (included). It comes with a basic user manual, but the manual doesn't go into much extra detail. For example, it doesn't tell you how to take the cover off the measuring tip. It turns out you just pull quite hard, but that wasn't obvious when I received it, and I don't like pulling hard on expensive electronics without knowing that is what I need to do. It also doesn't cover how you actually change tips in much detail (the magnetic tip screws out, and the other tip screws in). Note, however, that the protective cover for the meter only fits over the magnetic tip, so if you are using the other tip you can't use the cover. It comes with a black nylon case that the main meter fits into, along with a side pocket you can put the other tip in.
Also, setting the zero-point on the meter could be easier: It is done using a small (jeweler's) screwdriver inside the battery compartment. To adjust it, the compartment has to be open. This means you have to hold the spring-loaded battery contacts in place with one hand while turning the small screw with your other hand to zero out the meter. This does work, but I would hardly describe it as convenient, and am a bit surprised it doesn't have an electronic way of zeroing out the meter. (And the small screwdriver isn't included, so you'll need to have your own with you anytime you need to zero the meter.)
So if the price point and relatively basic functions of this meter meet your needs, I have no problem recommending it. But if you want something with more features (peak values, datalogging, setting the zero point electronically, etc.), you may want to check out alternative meters.
July 9, 2015