Dwyer AVLV-1DB1 is an Air Velocity Transmitter designed for clean air and non-combustible gases. It has a temperature range of 32 to 122°F (0 to 50°C) and offers accuracy as specified in the catalog chart. The transmitter operates on 24 VDC ±20% or 24 VAC ±20% power and has a response time of 4 seconds. It is field selectable for different velocity ranges, with an enclosure rating of NEMA 4X (IP66). The electrical connections are European style terminal blocks for power, output, and communication. Output signal options include 4-20 mA, 0-5 VDC, or 0-10 VDC. The transmitter features digital push buttons for zero and span adjustments, and can be optionally equipped with a 5-digit LCD display. It must be mounted parallel to the flow direction and is suitable for applications with humidity between 5 to 95% RH, non-condensing.