The Metering Mode button on your camera is symbolised by an eye-shaped icon within a rectangle. Within your metering mode function you will have either three or four metering modes: spot metering, partial metering, centre-weighted metering and evaluative metering. As you will see in our latest photography cheat sheet below, each metering option measures the brightness of a scene in different ways, depending on what subject you are shooting.
Portable pH meters offer full functionality in a handheld instrument so you can take readings around the production facility or out in the field. Gem Scientific offer a wide range of portable pH meters from budget models through to high specification units that are specifically designed for applications including food and alcohol production and environmental monitoring.
Garden Soil pH - I didn’t think too much about pH as I prepared my containers last year. I have a good meter, but since I was adding a lot of organic matter to the soil mixes I felt that would buffer any pH’s that were at the margins for most of my plants. Naturally it followed that some things didn’t do as well as I’d hoped.