USER-FRIENDLY MEASURING DEVICES air flow and velocity transmitters dpt-flow Multifunctional air flow transmitters for building automation systems The DPT-Flow series air flow transmitters are engineered for building automation in the HVAC/R industry. The most technologically advanced transmitters on the market, measuring volume flow, velocity, and static and differential pressure. The DPT-Flow series devices can be connected directly to the pressure measurement points in a centrifugal fan, providing accurate flow measurement of the fan. The smart user interface enables easy selection of settings according to the selected fan or in-duct measurement probe. DPT-Flow series devices include: • Two field selectable functions: o Measure and monitor in-duct volume flow, velocity or differential pressure o Measure and monitor air flow across centrifugal fans • Multiple field selectable measurement units: o Volume flow: m3/s, m3/h, cfm, l/s o Velocity: m/s, ft/min o Pressure: Pa, inWC, mmWC, kPa, mbar, psi • Unique proportional output options: o Volume flow or velocity: voltage (0-10 V) or current (4-20 mA) o Pressure: voltage (0-10 V) or current (4-20 mA) DPT-Flow series device options offer: • AZ (autozero) function for automatic zero point calibration, eliminating the need for periodic manual autozeroing to ensure long term accuracy similar products • AVT series air velocity transmitters • DPT-R8 series 8-range differential pressure transmitters • DPT-MOD series differential pressure transmitters with Modbus configuration DPT-Flow series devices are commonly used in HVAC/R systems for: • air flow monitoring across centrifugal fans and blowers • in-duct air flow monitoring • VAV applications model summary Copyright HK Instruments 2017 www.hkinstruments.fi Datasheet Version 6.0 2017

Performance Accuracy (from applied pressure): Models 1000 and 2000: Pressure < 125 Pa = 1 % + ±2 Pa Pressure > 125 Pa = 1 % + ±1 Pa Models 5000 and 7000: Pressure < 125 Pa = 1.5 % + ±2 Pa Pressure > 125 Pa = 1.5 % + ±1 Pa (Accuracy specifications include: general accuracy, temperature drift, linearity, hysteresis, long term stability, and repetition error) Thermal effects: Temperature compensated across the full spectrum of capability Overpressure: Proof pressure: 25 kPa Burst pressure:30 kPa Zero point calibration: Automatic autozero or manual pushbutton Response time: 1.0-20 s, selectable via...