Precision Digital PD6801 ProtEX level meter

The PD6801 ProtEX level meter from Precision Digital is an easy-to-read, 4-20 mA, loop-powered, explosion-proof meter designed for safe or hazardous environments, such as oil wells or chemical storage. The meter has FM, ATEX, CSA and IECEx approvals and is housed in a rugged, cast aluminium NEMA 4X enclosure. SafeTouch through-glass buttons allow operation without removing the cover, ensuring the integrity of the unit. Operating temperatures range from -40 to 75°C.

The PD6801 features an upper display that is 1.5 cm high and shows level. The lower display is 1 cm high and shows volume, per cent or a custom tag programmable for any seven alphanumeric digits. The backlit meter is easy to read from a distance, under various lighting conditions, and from wide viewing angles of up to ±40°.

Four sensors in the PD6801 operate as through-glass buttons for programming and operation without removing the cover in hazardous areas. These SafeTouch buttons are standard and allow high- or low-level alarm acknowledgement while being designed to prevent unintended triggers.

A 20-segment tank level indicator provides a quick view of height and will flash to alert operators about alarm conditions. It can be scaled independently of the analog input scale.

For non-linear signals, such as measuring the volume of odd-shaped tanks, the PD6801 features multipoint linearisation up to 32 points. The level and volume scales can use different numbers of linearisation points.