Pennsauken, N.J. Macro Sensors has introduced the HSI/R 750 series of hermetically-sealed, loop-powered 4-20 mA position transmitters for a wide range of position monitoring and feedback applications. These units are specifically designed for mechanical position measurement where a hard connection can be made to a test piece.
The 4-20 mA current loop input/output enables easy field integration with PLCs, digital indicators, host computer-based data processing, and QC data collection systems. Units can be configured for either loop-powered, two-wire or externally powered three-wire sourcing output to address different I/O requirements in various applications.
Constructed of TIG welded stainless steel and hermetically-sealed against hostile environments to IEC standard IP-68, the HSI/R 750 series devices can be installed in hostile environments while the loop wiring connects to remote indicators and/or controllers located in environments safe from harsh conditions. Units offer precise output with a maximum linearity error of 0.25% of full range output. For more precision measurement the HSI/R series is also available with ±0.10% linearity.
Available in full ranges from 0.10 inches (2.5 mm) to 20 inches (500 mm), these 3/4-inch (19 mm) diameter LVDTs are available as either blind bore units (HSI 750 series) terminated in a glass-sealed axial connector that prevents the core from passing completely through the coil assembly or in a through-bore design (HSIR 750 series) with the connector mounted radially to facilitate easy access to either end of the LVDT's core for better mechanical support and core guidance, as well as easier cleanout in dusty or gritty environments.
For position sensing that requires the opposite directional sense, HSI 750 transmitters are available with reversed output slope, which gives 20 mA when the core is first inserted, decreasing to 4 mA as the core moves inward. A mating connector plug is supplied with the HSI/R series sensors.
Product information: 4-20 mA LVDT transmitters
Macro Sensor, 1-856-662-8000, www.macrosensors.com