High frame rate is good, but to not get blur you just need a high shutter speed. Most digital cameras can do this easily. But simply having a high shutter speed

High frame rate is good, but to not get blur you just need a high shutter speed. Most digital cameras can do this easily. But simply having a high shutter speed isn't enough, as if it's fast enough no light will get it to get a proper exposure. That's why you'll need a supplemental light source, like infrared or a flash, a large aperture (aka large lens elements), or a lot of gain (ISO). It's really a balancing act between the three. The more zoomed the lens, the bigger the lens elements need to be to maintain the same aperture ratio. That's why a 600mm f4 is absolutely massive compared to a 50mm f4 lens. For something like this application though, the quality of the sensor doesn't need to be too high, you don't really that high of a shutter speed, nor do you need to worry about image noise. There's always light on at the pump, so you can easily calibrate for night time, if needed just bring a light meter (or use an app) to the spot at night and check.