📏 Accurate Atlas Scientific Calibration Solution (250mL): Achieve Precise Measurements Review

The PH meter ordered did not have a test solution, you need to put the powder bag in distilled water along with the tester. The tester came and turned out to be correct with 7.0

I use this pH 7.0 calibration standard to test hot tubs. It's accurate and stable. When I use it I only need about 10-15ml. I pour the used part of the solution into a separate clean plastic bottle and reuse it. The price is very cheap and the delivery was fast.

I ordered this because it was the cheapest with Prime Shipping. Came in a sealed bag, in a box, apparently to prevent leakage during transit. I calibrated my gauge with this solution with no problems and it looks like a decent product. It works just as well as the Blue Lab solution I used before. I will continue to order this solution when needed in the future as long as it remains the cheapest.