There are several brands and types of UV meters available on the market for testing the output of UV lamps. The choice of UV meter will depend on the specific needs and requirements of the user. Here are a few examples of popular UV meters:

1. Solarmeter® UV Meters: Solarmeter® offers a range of handheld UV meters designed for measuring UVA, UVB, and UVC light. These meters are compact, easy to use, and come with a one-year warranty.

2. Extech UV510 UV Light Meter: The Extech UV510 UV Light Meter is a handheld device that measures UVA and UVB light. It features a large LCD display, data hold function, and a built-in low battery indicator.

3. General Tools UV513AB Digital UVA/UVB Meter: The General Tools UV513AB Digital UVA/UVB Meter is a handheld device that measures UVA and UVB light. It features a large backlit LCD display, data hold function, and a built-in low battery indicator.

4. Dr. Meter UV-50 Handheld UV Light Meter: The Dr. Meter UV-50 Handheld UV Light Meter is a portable device that measures UVA and UVB light. It features a large LCD display, data hold function, and a built-in low battery indicator.

When choosing a UV meter, it is important to ensure that it is calibrated for the specific wavelength of UV light emitted by the lamp being tested. It is also important to follow the manufacturer's instructions for use and maintenance of the meter.