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  • New item   -87.18€Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0
    New item   -87.18€Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0 1
    New item   -87.18€Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0 2
    New item   -87.18€Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0 3
    New item   -87.18€Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0 4
    New item   -87.18€Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0 5

    Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0

    Code: DPS-G-4K0
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  • Product description

    Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0

    DPS-G-4K0 – a Sentera Controls differential pressure transmitter with display and a factory measuring range of 0–4000 Pa. It integrates a digital high-resolution differential pressure sensor and one analog / modulating output: 0-10 VDC, 0-20 mA or 0–100 % PWM signal, and Modbus RTU communication. The -G version – for 3-wire connection with a common supply and output “minus”, powered by 24 VAC or 24 VDC; IP65 enclosure, wall-mounted.

    Key idea:
    The transmitter converts the pressure difference between two points into a standard control signal: a controller, frequency converter or EC fan receives 0-10 VDC / 0-20 mA / PWM, while the BMS sees the actual pressure, airflow or velocity via Modbus RTU and can change all settings without a screwdriver. The display lets you see the value right on site – there is no need to carry a manometer when commissioning and tuning the system.
    Measuring range
    0–4000 Pa (factory default)
    Output
    0-10 VDC / 0-20 mA / PWM + Modbus RTU
    Power supply
    24 VAC / VDC (18–34 VDC, 15–24 VAC ±10 %)
    Protection class
    IP65, ASA enclosure, LED display

    Operating principle

    The transmitter is mounted on a wall or other solid surface near the measuring points, and the measuring points are connected with tubes to the aluminium “+” and “–” nozzles (for a 6 mm tube). For connection, the Sentera PSET-PVC-200 or PSET-QF-200 kits are convenient; for air velocity – the Pitot tube kits PSET-PTS-200 / PSET-PTL-200.

    An integrated digital sensor measures the pressure difference; three modes are available: differential pressure (Pa), air volume flow (m³/h – by the fan K-factor or Q = A × V) and air velocity (m/s – with the external PSET-PTX-200 Pitot tube kit). The output is factory-calibrated: 0 V at 0 Pa, 10 V at 4000 Pa. Over Modbus RTU (the 3SModbus application or the Sensistant configurator) the working window (min. interval 50 Pa for pressure, 10 m³/h for flow, 1 m/s for velocity), output type, response time of 0.1–10 s and alarm limits are set. The display shows pressure or airflow, and the LED indicators show whether the value is normal, in the warning zone or out of limits.

    The analog signal directly controls a Sentera speed controller, frequency converter or EC fan – maintaining constant pressure in the duct or room, while the BMS receives the exact value via Modbus. The 0–4000 Pa range is intended for systems where pressure exceeds 2000 Pa – powerful fans, long networks with high resistance, industrial air systems.

    Benefits DPS-G-4K0?
    One device – pressure, flow and velocity measurement, analog and Modbus RTU output, programmable range and alarm thresholds, local display and an IP65 housing. A single model in stock is enough for many sites.

    Technical specifications

    Product type Differential pressure transmitter with display
    Manufacturer / code Sentera Controls / DPS-G-4K0
    Series DPS (-F / -G; -125…+125 Pa, 0–1000 Pa, 0–2000 Pa, 0–4000 Pa, 0–10 000 Pa)
    Number of sensors 1 (digital, high resolution)
    Measuring range 0–4000 Pa (factory default)
    Operating modes Differential pressure, airflow (K-factor or Q = A × V), air velocity (with PSET-PTX-200)
    Min. operating interval 50 Pa (pressure), 10 m³/h (flow), 1 m/s (velocity)
    Accuracy ±2 % of the operating range
    Response time 0.1–10 s (selectable)
    Outputs AO1 – single: 0-10 VDC (RL ≥ 50 kΩ), 0-20 mA (RL ≤ 500 Ω) or 0–100 % PWM 1 kHz (RL ≥ 50 kΩ)
    Factory-set output 0 V at 0 Pa, 10 V at 4000 Pa
    PWM power supply Internal 3.3 or 12 VDC (jumper JP1) or external via a pull-up resistor
    Communication Modbus RTU (RS485, A, /B); configuration with 3SModbus or Sensistant
    Supply voltage 18–34 VDC or 15–24 VAC ±10 %
    Consumption max. 1.71 W, Imax 95 mA (DC); max. 3.3 W, Imax 220 mA (AC)
    Connection 3-wire, common supply and output GND (-G)
    Terminals Vin, GND, A, /B, AO1, GND
    Display 4-digit 7-segment LED (pressure or airflow)
    Button / indication SW1 – zero calibration or Modbus register reset; LED1 green – power and Modbus communication, LED2 green – value normal, LED3 yellow – warning zone, LED4 red – out of limits (blinking – sensor fault)
    Pressure nozzles Aluminium, for Ø6 mm tube
    Wire cross-section 1.5 mm²; cable gland 3–6 mm
    Housing ASA plastic, grey (RAL 9002), wall-mounted
    Protection class IP65 (EN 60529)
    Operating environment -5…+65 °C, < 95 % rH non-condensing
    Medium Clean air, non-aggressive and non-flammable gases
    Weight 0.14 kg (net)
    Packaging dimensions 95 × 85 × 70 mm
    Compliance EMC 2014/30/EU (EN 61326-1, EN 61326-2-3), WEEE 2012/19/EU, RoHS 2011/65/EU

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

    Original manufacturer documentation – technical data, wiring diagrams and installation instructions.

    Main functions

    • Three measuring modes – differential pressure, airflow in m³/h by K-factor or cross-section, and air velocity in m/s with a Pitot tube.
    • Selectable output – 0-10 VDC, 0-20 mA or PWM – suitable for controllers, frequency converters, EC fans and regulators.
    • Modbus RTU – all measured values and settings are accessible from a BMS / SCADA; configurable with 3SModbus or Sensistant.
    • Programmable working window – the min. and max. limits can be narrowed (down to a 50 Pa interval) – the output signal is used only for the required pressure.
    • Response time 0.1–10 s – damps pulsations and turbulence, so the signal to the controller is stable.
    • Zero calibration with a button – SW1 – quick zero check on site, and also resetting the Modbus registers to factory defaults.
    • LED display – 4-digit on-site readout – convenient during commissioning, tuning and servicing.
    • Status LEDs – a green / yellow / red indicator shows whether the value is normal, in the warning zone or out of range.
    • PWM with internal or external power supply – a jumper selects the 3.3 or 12 VDC internal PWM supply, or an external one via a pull-up resistor.
    • 24 VAC or DC power supply – 3-wire connection with a common GND – the transmitter is easy to connect to a 24 VAC control transformer or an 18–34 VDC source.

    Where is it used?

    • Higher-pressure fans and industrial air systems
    • Filter fouling monitoring in ventilation units
    • Maintaining constant pressure in a duct (VAV systems)
    • Airflow measurement via the fan K factor
    • Air velocity measurement in a duct with a Pitot tube
    • Ensuring minimum ventilation rates in buildings
    • Clean rooms, kitchens, laboratories – pressure monitoring

    On-demand operation

    For industrial ventilation designers.
    The 0–4000 Pa range is intended for systems where the pressure exceeds 2000 Pa – powerful fans and long networks with high resistance.
    For HVAC commissioning engineers.
    A 4-digit LED display shows pressure or flow locally, so no separate manometer is needed during commissioning.
    For installers with a 24 VAC control transformer.
    The -G version is wired with 3 wires with a common GND and powered at 15–24 VAC or 18–34 VDC.

    Practical application

    If you need to monitor or maintain the constant pressure created by a powerful fan, then the DPS-G-4K0 with the factory scale 0–4000 Pa (every 400 Pa = 1 V) is connected to the measuring points, and the 0-10 VDC signal is passed to a Sentera controller, a frequency converter or, over Modbus RTU, to the BMS. The value is shown locally on the display, so commissioning is done without a manometer.

    Application guide: how it is used in practice

    The DPS-G-4K0 adapts to different sites – only where the tubes are connected and where the signal is routed changes:

    Site What is connected Result Installer's note
    Air handling unit filter Tubes upstream and downstream of the filter; AO1 or Modbus → BMS When the filter becomes clogged – an alarm and timely planned replacement Narrow the working window to the filter pressure limits
    Constant pressure in the duct Duct point and environment; AO1 → Sentera speed controller / frequency converter / EC fan Fan speed is varied so that the pressure stays constant Increase the response time if the signal pulsates
    Airflow measurement Measuring points at the fan inlet nozzle (PSET-PVC-200) The transmitter displays and transmits m³/h according to the K-factor You will find the K factor in the fan documentation
    Air velocity in the duct Pitot tube PSET-PTS-200 / PSET-PTL-200 Measured in m/s, flow is calculated as Q = A × V Install the Pitot tube in a straight section of the duct
    Building with BMS Modbus RTU (A, /B) Values and settings are managed centrally Do not mix -F and -G versions in the same network

    How to choose the range of a pressure transmitter

    Measuring range / connection Recommended model
    -125…+125 Pa, 3-wire, 24 VAC/VDC DPS-G--LP (low ± pressure difference between rooms)
    -125…+125 Pa, 4-wire, 18–34 VDC DPS-F--LP (low ± pressure difference between rooms)
    0–1000 Pa, 3-wire, 24 VAC/VDC DPS-G-1K0 (filters, duct pressure, VAV)
    0–1000 Pa, 4-wire, 18–34 VDC DPS-F-1K0 (filters, duct pressure, VAV)
    0–2000 Pa, 3-wire, 24 VAC/VDC DPS-G-2K0 (universal AHU / fans)
    0–2000 Pa, 4-wire, 18–34 VDC DPS-F-2K0 (universal AHU / fans)
    0–4000 Pa, 3-wire, 24 VAC/VDC DPS-G-4K0 (higher-pressure fans) ← this model
    0–4000 Pa, 4-wire, 18–34 VDC DPS-F-4K0 (higher-pressure fans)
    0–10 000 Pa, 3-wire, 24 VAC/VDC DPS-G-10K (high-pressure industry)
    0–10 000 Pa, 4-wire, 18–34 VDC DPS-F-10K (high-pressure industry)
    Rule: choose the range so that the maximum operating pressure is about 50–80 % of the upper limit – the working window can be narrowed via Modbus RTU, but not widened. The -G (3-wire) version suits 24 VAC or DC supply with a common GND; -F (4-wire) – DC only with separate GNDs, when the output GND must be separated from the supply GND (e.g. in DC-powered networks with other devices). Do not mix -F and -G on the same network.
    When to choose another solution: without a display – HPS series; for two points – DPD (with display) or HPD (without display); connection kits PSET-PVC-200, PSET-QF-200, Pitot tubes PSET-PTS-200 / PSET-PTL-200; for Modbus configuration – CNVT-USB-RS485-SET converter; for 24 VDC power – SEPS8-24-40.

    Pros

    • Pressure, airflow and velocity in a single transmitter
    • 0-10 VDC / 0-20 mA / PWM output and Modbus RTU
    • Programmable working window, response time and alarm limits
    • Accuracy ±2 % of the operating range
    • IP65 ASA enclosure, aluminium nozzles
    • 4-digit LED display for on-site value reading

    Cons / limitations

    • Only for clean air and non-aggressive, non-flammable gases; operating environment -5…+65 °C
    • Full configuration requires Modbus RTU (3SModbus / Sensistant) and a CNVT-USB-RS485 converter
    • The common GND of -G must not be connected to other DC-powered devices; in that case choose DPS-F-4K0
    • Single measuring channel – for two points choose DPD-G-4K0
    • Air velocity requires a separate Pitot tube set PSET-PTS-200 / PSET-PTL-200

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified electrician / automation technician with the power disconnected.
    • Power supply 18–34 VDC or 15–24 VAC ±10 % (the terminal table specifies AC as 13–26 VAC); use a safety transformer or a power supply.
    • Never connect the common GND of the -G version to other DC-powered devices – they may be irreversibly damaged.
    • Do not use -F and -G type transmitters in the same network.
    • The transmitter is intended for clean air and non-aggressive, non-flammable gases only; operating environment -5…+65 °C, < 95 % rH non-condensing.

    Quick selection guide

    0–4000 Pa
    0-10 VDC / 0-20 mA / PWM
    Modbus RTU
    24 VAC/VDC
    IP65
    LED display
    Suitable when you need:
    • to measure the pressure difference within 0–4000 Pa and pass it to a controller or BMS;
    • to maintain a constant pressure or flow by controlling a fan;
    • to integrate the measurement into a BMS via Modbus RTU.
    Check before use:
    • the maximum operating pressure – whether it fits within the 0–4000 Pa range;
    • the controller power supply and connection: 3 wires with a common GND (-G) or 4 wires with separate GNDs (-F);
    • whether airflow (fan K-factor) or velocity (Pitot kit) measurement will be needed.
    Important reminder: The DPS-G-4K0 measures only the pressure difference of clean air and non-aggressive, non-flammable gases; connection tubes and Pitot tubes are ordered separately.

    FAQ

    Can the DPS-G-4K0 be powered at 24 VAC?
    Yes – the -G version is powered with 15–24 VAC ±10 % or 18–34 VDC and connected with 3 wires with a common GND.
    Can the measuring range be changed?
    Via Modbus RTU the working window can be narrowed to a 50 Pa interval within the factory 0–4000 Pa range, but it cannot be widened.
    Does the transmitter measure airflow and velocity?
    Yes – airflow in m³/h from the fan K-factor or Q = A × V, and air velocity in m/s with the Pitot tube kit PSET-PTS-200 or PSET-PTL-200.
    Which signals will I get?
    A single output AO1 with a selectable 0-10 VDC, 0-20 mA or PWM signal and Modbus RTU communication.
    Does it have a display?
    Yes, the 4-digit 7-segment LED display shows the differential pressure or airflow.
    How do I configure the transmitter?
    Via RS485 with the CNVT-USB-RS485 converter and the Sentera 3SModbus software or the Sensistant configurator.

    Differential pressure transmitter with display | 0-4000Pa | 0-10VDC/0-20mA/PWM | Modbus RTU | 24VAC/VDC | 3-wire | IP65 | Sentera Controls | DPS-G-4K0

    Sentera DPS-G-4K0 – differential pressure transmitter with display 0–4000 Pa, 0-10 VDC / 0-20 mA / PWM and Modbus RTU, 24 VAC/VDC, 3-wire, IP65 – for pressure and airflow control of higher-pressure fan and duct systems and industrial air handling units.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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