Description
The DDPG-TFT (Model: PG-101) is a digital differential pressure gauge designed to fit the standard Magnehelic® gauge cutout, making it a natural upgrade for cleanrooms, biosafety cabinets, hospital isolation rooms, operating theatres, and air handling units (AHUs).
Unlike analog gauges that simply display a reading, the DDPG-TFT goes further. Its 3" multicolour TFT screen changes font colour from white to red when pressure exceeds set limits, giving staff an instant visual alert without needing to be at the device. This makes it especially valuable in environments like hospital OTs and pharmaceutical cleanrooms where pressure compliance is critical and a missed alarm can have serious consequences.
It also integrates directly with BMS, SCADA, and PLC systems via RS485 Modbus, and supports 4–20 mA analog output, making it easy to incorporate into existing building management infrastructure without additional hardware.
Features
- Field Selectable Engineering Units
Engineering units can be switched between Pascals (Pa), Inches Water Column (In.W.C.), and mm Water Column (mm.W.C.) directly from the front panel. This accommodates varying standards across facility types, as pharmaceutical QC laboratories typically operate in Pascals while HVAC engineers prefer mm.W.C., with no reconfiguration or recalibration required.
- Accurate and Reliable Measurement
Delivers stable, repeatable differential pressure readings with ±0.5% full-scale accuracy. In semiconductor fabrication facilities and pharmaceutical cleanrooms, even minor pressure deviations can compromise product integrity or regulatory compliance, making consistent and reliable measurement essential.
- Easy-to-use Interface
Parameters, alarm setpoints, and menu navigation are all accessible via front-panel keys, requiring no specialist tools or training. This is particularly beneficial in hospital operating theatres and pharmaceutical manufacturing environments where operational demands are high and staff onboarding time is limited.
- Process Monitoring in Real Time
Live differential pressure levels across filters, room boundaries, and laminar airflow cabinets are displayed continuously. In life sciences environments, this ensures ISO classification requirements and GMP pressure cascades are being maintained at all times, not only during scheduled inspections or audits.
- Communication with RS485 Modbus
Integrates directly with BMS, SCADA, and PLC systems for centralised pressure monitoring across an entire facility. In large semiconductor fabrication plants or multi-room pharmaceutical suites, consolidated data from all monitored zones supports faster incident response and complete audit trail documentation for regulatory submissions.
- Built-in buzzer alarm
An audible alert is triggered immediately upon setpoint breach, ensuring prompt staff notification even in high-noise production environments. In hospital isolation rooms and biosafety cabinets, where an unacknowledged pressure failure carries serious contamination risk, this immediate notification removes any dependence on manual periodic checks.
Applications
- Food Processing Areas: Monitors differential pressure across ventilation filters and process enclosures to maintain clean airflow, reducing the risk of airborne contamination in food production environments.
- Data Centers: Monitors differential pressure across cooling units and air filtration systems to ensure consistent airflow, supporting thermal management and reducing the risk of equipment failure due to inadequate ventilation.
- Semiconductor and Electronics Manufacturing: Monitors cleanroom differential pressure to maintain the required ISO classification, protecting sensitive wafers and electronic components from particulate contamination during fabrication.
- Filter Pressure Monitoring: Continuously tracks pressure drop across HEPA and other filtration systems, providing early indication of filter loading or blockage so that maintenance can be scheduled before air quality or airflow is compromised.
- Pharmaceutical and GMP Environments: Maintains and monitors the differential pressure cascades required between classified zones in GMP manufacturing facilities, supporting regulatory compliance with standards such as WHO, EU GMP Annex 1, and Schedule M.
- Hospital Isolation Rooms and Operating Theatres: Monitors the differential pressure between isolation rooms, operating theatres, and adjacent corridors to ensure directional airflow is maintained, preventing cross-contamination and supporting infection control protocols.
- Biosafety Cabinets: Continuously monitors differential pressure within biosafety cabinets to verify that containment integrity is maintained, ensuring a safe working environment when handling biological or hazardous materials.
Specifications
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Frequently Asked Questions
- AI-DDPG vs. AI-DDPG TFT-what is the difference?
A: The AI-DDPG TFT is a newer and better version of the AI-DDPG. It carries forward the capability to replace the Magnehelic® gauge, suited with a 4.5" cutout. With a multicolored TFT screen and much improved alarms and user interface it is the ultimate gadget for critical HVAC and cleanroom applications.
- What are the differences of DDPG TFT vs an analog gauge?
A: The DDPG TFT differs from a traditional analog gauge in several key ways:
Digital Display: Readings are shown on a TFT digital screen, eliminating the need for manual recording by the operator.
Alarm Buzzer: Built-in audible alert for out-of-range conditions.
4-20 mA Output: Standard analog signal output for integration with control systems.
RS485 Communication Interface: Enables digital data transmission and remote monitoring.
Improved Process Visualization: Clearer, more precise readings compared to a needle-based analog gauge.
Automation Integration: Can be connected directly into automated systems and SCADA/DCS environments.
- Can Magnehelic® gauges be replaced with a DDPG TFT?
A: Yes. The DDPG TFT is a direct digital successor of analog Magnehelic® gauges. It offers greater readability, alarms and communication functions than analog instruments.
- What kind of screen does the DDPG TFT provide?
A: It utilizes a bright 3'' multicolour TFT screen making it easy to read and monitor at glance. The multicolor TFT display turns red in alarm condition, along with audible buzzer alarms.
- Does the device have an alarm?
A: Yes. It has a built-in alarm buzzer in case the setpoint is passed and is capable of detecting process alerts. In addition, there is visual alarms where the reading turns red in alarm condition for ease of identification.
- Can the DDPG TFT interface with a BMS or SCADA system?
A: Yes it can, by using an RS485 Modbus transmission, it will easily interface to: BMS, SCADA, PLC systems
- What are the available measurement units?
A: The device works with various field selectable engineering units such as: Pascals (Pa), Kilopascals, mm Water Column (mm.W.C.) , inches Water Column (In.W.C.) (any other units customizable).
- Is it possible to mount the AI-PG101 (DDPG TFT) on a clean room wall?
A: Yes, the AI-DDPG-TFT is designed for flush mounting in cleanroom walls. In other environments, we can provide the device with a wall-mounting back box.
- Does the machine require a calibration from time to time?
A: To ensure correct measurements the machine should be regularly calibrated, specifically in a cleanroom environment and a pharmaceutical setting.
- What are the main advantages of digital differential pressure gauge (TFT display)?
A: Some advantages are:
a) Better readability: TFT display offering clear readout
b) Alarm features: Visual + audio buzzer alarm
c) Communicative function: Integrates with existing system infrastructure via 4-20 mA (analog outputs) or RS485 Modbus Communication (for BMS systems)
d) Higher accuracy: Offers 0.5% full scale accuracy
- Are alarm set points configurable?
A: Yes. Users can select desired setpoints according to the process to be monitored, to detect alarms.
- Is the AI-DDPG-TFT an equivalent to other solutions from Johnson Controls, Setra, or Dwyer?
A:Y es. The closest equivalent in form factor is the Dwyer DM-2000, which shares the same panel cutout size and offers a 4-20 mA output with an optional LCD display. However, the AI-DDPG-TFT goes further by incorporating a TFT color display, built-in buzzer alarm, and RS485/Modbus communication all in a single panel-mount unit.
Products from Setra (Model 267) and Johnson Controls (SDP2500) serve a similar purpose but are designed primarily as transmitters/transducers for HVAC and BMS integration. These do not combine a TFT display, audible alarm, and RS485 communication in one panel-mount housing at a comparable price point. The AI-DDPG-TFT is therefore the more complete solution for applications such as clean rooms, biosafety cabinets, hospital OT rooms, and AHUs, where local display, audible alarming, and BMS/SCADA integration are all required in a single device.
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