Why the LI-840A?
The LI‑840A XML communication protocol provides easy integration and complete control of the analyzer. Automatic temperature and pressure compensation ensures accurate, stable readings over a variety of environmental conditions.
The user-cleanable optical bench reduces potential down-time and saves money because factory cleaning and recalibration are not required. There is no need to change components or recalibrate when measuring high concentrations. The optical source is field-replaceable without factory service or calibration.
The LI‑840A features high and low alarms, which activate LED indicators and electronic control signals (open drain or TTL (0-5 V) output) when CO2 or H2O levels are outside a user-specified range. The alarms also provide user-configurable dead-band settings for advanced regulatory feedback controls.
Versatile output options, including scalable linear analog outputs, current loop outputs, and XML communications allow you to choose the data output method that is best for your application.