Ashcroft 451259 4 1/2 in Process Pressure Gauge 0 to 200 psi

Ashcroft 451259 Process Pressure Gauge

The Ashcroft 451259 is a 4 1/2 inch process pressure gauge designed for technicians who need accurate readings up to 200 psi. It features a 1/2 inch male NPT bottom connection for direct mounting on compatible process lines. The white dial with black markings provides clear visibility in industrial environments. This new instrument suits maintenance and testing applications requiring reliable pressure indication.

Accuracy and Stability Under Sustained Load

The gauge maintains a stated accuracy of +/- 0.5 percent across the full 0 to 200 psi range during continuous operation. Its polybutylene terephthalate case resists deformation that could affect calibration over time. Without a dry dampening feature, the pointer responds directly to pressure changes without artificial smoothing. The glass lens protects the dial from contaminants that could obscure readings during extended use.

Environmental Durability and Power Independence

As a purely mechanical instrument, the gauge draws zero electrical power and generates no heat or acoustic noise during operation. The black PBT case offers chemical resistance suitable for harsh process environments. The absence of an IP or NEMA rating indicates the unit is not sealed against dust or water ingress. The solid-state construction eliminates electronic components that could fail under thermal cycling.