Vaisala Indigo520 [INDIGO520-B-1-N-0-N-0-N-A] Universal Premium Transmitter w/o Display, 15 to 35VDC / 24VAC. Vaisala Indigo520 transmitter is an industrial-grade, robust transmitter that accommodates 1 or 2 Vaisala Indigo compatible probes for humidity, temperature, dew point, carbon dioxide, hydrogen peroxide, and moisture in oil measurements. The transmitter can measure barometric pressure with an additional module.

Choose the humidity measurement probe that best suits your needs:

• HMP1 for laboratories
• HMP3 with a field replaceable sensor for general use
• HMP7 for demanding, high-humidity industrial and meteorology applications
• HMP9 for confined spaces
• TMP1 for temperature measurement only