Circuit board

Alphasense 4-20mA digital transmitters offer the following features:
• Factory calibration, custom-set for immediate use
• Digital zero, sensitivity and temperature compensation
• Digital and 4-20mA output
• Biased or unbiased operation
• Calibration and range change
Alphasense 4-20mA digital transmitter boards provide a cost-effective way for Original Equipment
Manufacturers to include 4-20mA gas sensor transmitters for fixed installation systems. The range of
sensors are shown in Table 1. Transmitters are supplied with pre-calibrated sensors.
The 4-20mA output signal performance is as shown on individual sensor datasheets. Calibration and
digital interface communication use the 2-wire power supply (HART-type communications).