Spi 31-040-9 Digital Combination Protractor Inclinometer

Product Description

The SPI 31-040-9 is a digital combination protractor and inclinometer designed for precise angle measurement in trade and industrial applications. It covers a full 360-degree measurement range with a resolution of 0.01 degrees, making it suitable for work that demands fine angular readings. Accuracy varies by range: 0.05 degrees at 0 to 10 degrees, 0.20 degrees at 10 to 80 degrees, and 0.10 degrees at 80 to 90 degrees. The unit weighs 1.5 pounds and supports data output for integration with logging equipment or digital readout systems. It ships as a single unit with no magnetic base.

This instrument is used by machinists, pipefitters, millwrights, and HVAC technicians who need verified angle readings during layout, alignment, or installation work. Typical applications include checking pipe slope, verifying equipment levelness, setting duct angles, and confirming structural or mechanical alignment. The digital display eliminates parallax error common with analog protractors and speeds up readings in tight or poorly lit work areas. It is equally suited to shop use and field service.

Key Features

• Full 360-degree angle measurement range with dual range support including a 90-degree mode
• 0.01-degree resolution for fine angular measurements
• Tiered accuracy: 0.05 degrees at 0 to 10 degrees, 0.10 degrees at 80 to 90 degrees, 0.20 degrees at 10 to 80 degrees
• Digital display eliminates analog reading errors
• Data output port for connection to external logging or readout devices
• Lightweight at 1.5 pounds for portable field and bench use

Compatibility

Designed as a general-purpose digital angle measuring instrument suitable for use with standard machining, pipefitting, HVAC, and mechanical alignment workflows where a precise protractor or inclinometer is required.

Installation Notes

This instrument does not require installation in the traditional sense but should be handled and stored per manufacturer guidelines to protect the digital sensor and display. Zero the unit on a known flat reference surface before taking measurements. If using the data output feature, verify cable and interface compatibility with the receiving device before connecting. No permanent mounting or special tools are required for standard handheld use.