Traditional U-tube manometer with easy zero point calibration
Humidity transmitters for building automation systems that use Modbus serial communication protocol
RHT-MOD relative humidity transmitters are engineered for building automation systems in the HVAC/R industry. The RHT measures relative humidity (rH), and temperature (T). RHT devices are available with large touchscreen display making conﬁguration of the device quick and easy. Configuration is also possible via Modbus network.
RHT-MOD devices include:
• Separate ﬁeld conﬁgurable Modbus output for each measurement parameter (rH, T)
• Offset feature enabling field calibration for each measurement parameter (rH, T)
• One analog output for selected measurement: voltage (0/2–10 V) and current (4–20 mA)
• Optional relay output
Field adjustable, multi-range differential pressure transmitters with two pressure sensors for air
DPT-Dual series differential pressure transmitters are engineered for building automation in the HVAC/R industry. DPT-Dual is a technologically advanced transmitter measuring static and differential pressure from two different points, with field selectable units, range and output, all in a single device.
DPT-Dual series devices include:
• Multiple measurement units, field selectable via jumper, including: inWC, mmWC, Pa, mbar. • 8 field selectable measurement ranges, unidirectional or bi-directional, selectable via jumper.
Electronic differential pressure switch and transmitter
The DPI series electronic pressure measuring devices are engineered for building automation in HVAC/R industry. The most technologically advanced and versatile electronic differential pressure switches on the market, combining up to two relay outputs and 0–10 V output options.
The DPI includes the following field selectable features: • Configurable switching point: Open on rise or fall in pressure • Hysteresis of setpoint • Measurement units (Pa, kPa, mmWC, inWC, mbar) • Measurement range (4 ranges per model) • Output signal (0−10 V, NO/NC) • Span and zero point calibration
Multifunctional CO2 transmitters for building automation systems
CDT series air quality transmitters are engineered for building automation systems in the HVAC/R industry. The CDT series measures carbon dioxide (CO2) utilizing the industry standard NDIR measurement principle, and temperature (T). Optional relative humidity (rH) measurement is also available in the same device. CDT series devices are available with large touchscreen display making conﬁguration of the device quick and easy.
The CDT2000 series transmitters calibrate themselves automatically using ABC logicTM. The ABC logicTM requires that the space in which the transmitter is used needs to to be unoccupied for four hours per day so that the indoor CO2 concentration drops to the outside level. CDT2000-DC is a dual channel model with a measuring channel and a reference channel that makes a continuous comparison and the necessary adjustment accordingly. CDT2000-DC is also suitable for buildings that are continuously occupied.
CDT series devices include:
• Separate ﬁeld conﬁgurable output for each measurement parameter (CO2, rH, T)
• Proportional output options including: voltage (0–10 V, 2–10 V) and current (4–20 mA)
• Offset feature enabling field calibration for each measurement parameter (CO2, rH, T)
• Time extension button that enables boosting ventilation manually using the touchscreen display (models with relay)
CDT2000 series device options offer:
• 2” x 3” touchscreen display
• Field configurable relay for any of the three parameters
• Modbus configuration
Differential pressure transmitter with Modbus communication and Input terminal
The DPT-IO-MOD differential pressure transmitter for air conforms to Modbus over serial line protocol using RTU transmission mode and RS485 interface. The digital output signal is sent over Modbus enabling the DPT-IO-MOD to connect directly to a field communications network.
DPT-IO-MOD requires less wiring than the traditional 3-wire transmitters since multiple devices can be connected on serial line.
The DPT-IO-MOD includes an Input terminal that enables reading of multiple other signals such as temperature or control relays over Modbus. The Input terminal has two input channels designed to accept 0−10 V, NTC10k, Pt1000, Ni1000/(-LG), and BIN IN (potential free contact) signals. For example, DPT-IO-MOD can read values from one differential pressure measurement point and two temperature measurement points. Hence, the DPT-IO-MOD does the work of three transmitters.
FloXact measurement probes
The FloXact™ probe is a differential air pressure device designed to measure air volume flow in a duct. It includes multiple sensing points to measure total and static pressures. The FloXact™ probe incorporates a unique design to amplify the differential pressure by 2.5 times for accurate measurement of lower air velocities down to 1.0 m/s (200 fpm). It is easy to install and cost-effective.
• Multiple sensing points for greater accuracy • Easy installation • Chamfered sensing points for consistent readings • 2 % accuracy • 2.5 X signal amplification • Accepts 1/4″ OD tubing
Multifunctional differential pressure transmitters with air flow measurement and Modbus communication
DPT-MOD is a multifunctional transmitter for measuring volume flow, velocity, and static and differential pressure. The measurements can be read and the configuration done via Modbus communication. DPT-MOD requires less wiring than the traditional 3-wire transmitters because multiple devices can be connected on serial line. DPT-MOD can also be used with several different measurement probes such as FloXact™ or pitot tube, and air dampers.
DPT-MOD series devices include: • Two selectable functions: o Measure and monitor in-duct volume flow, velocity or differential pressure o Measure and monitor air flow across centrifugal fans • Multiple 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 • Modbus communication protocol
DPT-MOD series device options offer: • AZ (autozero) function for automatic zero point calibration, eliminating the need for periodic manual autozeroing to ensure long term accuracy
CO2 transmitters with temperature output for duct that use Modbus serial communication protocol
CDT-MOD-2000 Duct combines CO2 and temperature measurements in one device installed in air ventilation duct. Illuminated display ensures easy readability also from a distance. The CDT-MOD-2000 Duct has a screwless lid and an easily adjustable mounting flange that make the installation of the device easy.
The CDT-MOD-2000 Duct series transmitters calibrate themselves automatically using ABC logicTM. The ABC logicTM requires that the space in which the transmitter is used needs to to be unoccupied for four hours per day so that the indoor CO2 concentration drops to the outside level. CDT-MOD-2000-DC Duct is a dual channel model with a measuring channel and a reference channel that makes a continuous comparison and the necessary adjustment accordingly. CDT-MOD-2000-DC Duct is also suitable for buildings that are continuously occupied.
CDT-MOD-2000 Duct series devices include:
• Separate Modbus output for each measurement parameter (CO2 and T)
• Offset feature enabling field calibration for each measurement parameter (CO2 and T)
• Mounting flange
• Clear backlit display