The DHS250 High Performance Series Heat Spys have the added capability of RS232 interface for computer storage and display of readings. The DHS250MM for Ferrous and Non-Ferrous Liquid Metal, Glass, and Ceramic features a laser sighting system, 50:1 Distance to Spot Size Ratio (nominal). Available RS232 interface and Windows compatible software for online data acquisition. Option for 1mV/°C Analog Data Output. Battery powered (one 9V) for portability, rechargeable option. Dual display with auto back light. Adjustable Emissivity, .20 to 1.0. Fahrenheit or Celsius scale selection. Readings for Maximum, Minimum, Average, or Differential Value. Audible and Visual Alarm at HI/LO Setpoint. Sleek, ergonomic design, with rubber "bumper" to protect the lens. Built in tripod mount and locking trigger mechanism. Stores up to 250 temperature readings (DHSM, MS, and MH). 1 Year Warranty. All DHS250 Series Instruments are supplied with a foam-lined molded carrying/storage case, wrist strap, and one 9V battery.