The CS420 was manufactured by Druck for use in surface, groundwater, or hostile fluid applications. It was quite similar to the CS425 (retired also), but offered increased static accuracy. The sensor's accuracy was ±0.1% FS, BSL (combined non-linearity, hysteresis, and repeatability). The CS420 featured a titanium body with an isolated diaphragm and NEMA6 (IP68) ingress protection to 2300 feet of water.