Product Details:

NI 784140-01 is a quarter bridge adapter, also known as NI-9985, designed for NI 9218 DSUB universal C series module. This adapter module is used to complete quarter-bridge circuit configuration for strain gauge measurement applications, converting strain gauge resistance changes into measurable voltage signals for data acquisition hardware. It supports 350 Ohm strain gauge sensors and adopts front mounting structure, which can be directly installed on the front of NI 9218 module to simplify field wiring of strain testing. The quarter bridge adapter provides built-in precision completion resistors required for quarter-bridge measurement, eliminating the need for external discrete resistors and reducing measurement errors caused by loose wiring and component mismatch. It is widely used for structural stress testing, mechanical component strain monitoring, fatigue testing and material deformation measurement in industrial testing, aerospace, automotive and civil engineering fields. The 784140-01 maintains stable measurement performance under vibration and temperature fluctuation conditions, ensuring accurate strain data collection for static and dynamic mechanical testing. With compact structure and standard DSUB interface, it can be quickly assembled with NI C series data acquisition modules, supporting convenient setup and replacement during testing tasks. This strain gauge adapter module helps engineers capture micro deformation and stress distribution data of test objects, complete product performance verification and structural safety assessment, improving the reliability of mechanical design and structural analysis.

Core Attributes:

Brand: NI (National Instruments, part of Emerson)

Model: 784140-01

Product Type: Quarter Bridge Adapter / NI-9985

Compatible Module: NI 9218 DSUB Universal C Series Module

Strain Gauge Resistance: 350 Ohm

Mounting Style: Front mount

Application: Quarter-bridge strain gauge measurement

Feature: Built-in precision completion resistor, compact front mounting, simplified strain test wiring, high stability strain signal conversion