616KD-B-13 is a series 616KD differential pressure transmitter with One-Touch® digital push- button calibration technology is designed for simplicity, making it the ideal choice for installers and maintenance professionals. This instrument not only alleviate cumbersome turn pots typically found in most transmitters, but eliminate entirely the need to span the instruments during calibration. With a single digital push-button, both ZERO AND SPAN are calibrated properly, nothing else is required. No additional reference pressure sources or separate calibration devices are necessary. Typical applications include air handlers, variable air volume, duct pressure and filter monitoring.