Usefully understood as supplying of various types of environmental monitoring instruments, Hal Technology (HalTech) offers comprehensive products and system solutions in a broad range of environmental monitoring instrumentsto include, for example, a handheld-portable hybrid particle counter. The firm's current line of products includes * Clean environment instruments/systems,* Indoor/outdoor air quality,* Remote monitoring sensors/systems, and * Industrial hygiene. HalTech also offers a complete package of calibration, service, repair, training and consultation services.