Ashcroft 93021XLL Pressure Gauge 4.5 in Dial Rear Flange

Product Description

The ASHCROFT 93021XLL is an analog pressure gauge built for industrial and trade service applications requiring accurate, reliable pressure measurement. It features a 4.5-inch dial with a 0 to 15 psi pressure range and a calibrated accuracy of 0.5 percent of scale, making it suitable for low-pressure systems where precision matters. The thermoplastic case offers resistance to common shop and field environments without the added weight of stainless or brass housings. It mounts via a rear flange configuration, seating flush against panel surfaces or instrument boards. This gauge is dry-fill, containing no liquid dampening fluid, which simplifies installation and disposal.

This gauge is well-suited for residential and light commercial HVAC, plumbing, and mechanical systems where low-pressure monitoring is required. Rear flange mounting makes it a practical choice for panel-mounted instrumentation installations. Technicians working on low-pressure gas, water, or air circuits will find the large 4.5-inch dial easy to read during system commissioning, diagnostics, or ongoing monitoring tasks. It is typically installed by licensed HVAC technicians, plumbers, or mechanical contractors as part of a fixed instrumentation assembly.

Key Features

• 4.5-inch analog dial for clear, at-a-glance pressure readings
• 0 to 15 psi pressure range suited for low-pressure circuit monitoring
• 0.5 percent of scale accuracy for precise measurement
• Rear flange mount design for panel or board installation
• Dry-fill thermoplastic case — no liquid filler required
• Lightweight thermoplastic construction reduces overall instrument weight

Compatibility

Designed as an OEM-style or replacement pressure gauge for panel-mounted instrumentation in low-pressure HVAC, plumbing, and mechanical systems requiring a 4.5-inch rear-flange-mount gauge with a 0 to 15 psi range.

Installation Notes

Installation should be performed by a qualified technician. Isolate and depressurize the system completely before removing or installing any pressure gauge. Verify the thread size and mount configuration match the port and panel cutout before seating the gauge. Follow applicable codes such as the IFGC or IPC for gas and plumbing system instrumentation installations.