Profile: Mack Information Systems, Inc. designs and manufactures precision electrical/electronic instrumentation. We manufacture temperature monitoring & recording systems used for critical temperature controlled equipment in hospitals, laboratories, blood banks and pharmaceutical companies. Our plexxium is a complete laboratory monitoring and control system that integrates seamlessly with lablink. Our TMS-97 is a single point temperature monitor for the bloodbank industry, which also allows the user to configure low and high temperature alarm points as well as calibrate the sensor.