HK Instruments DPT-R8 Differential Pressure Transmitter
| Measuring Ranges | Eight selectable ranges depending on model, typically from ±25 Pa up to ±7000 Pa |
| Output Signals | 0–10 V, 2–10 V, or 4–20 mA (three-wire system) |
| Selectable Units | Pa, kPa, mbar, inch WC, mm WC, psi |
| Accuracy | For pressures below 125 Pa: ±(1% + 2 Pa) | For pressures above 125 Pa: ±(1% + 1 Pa) |
| Zero Calibration | Automatic or manual zero (depending on model version) |
| Response Time | Adjustable between 0.8 s and 8 s |
| Over-pressure Protection | Proof pressure up to 25 kPa, burst pressure up to 30 kPa |
| Media | Dry air or non-aggressive gases |
| Temperature Range | Operating −20 °C to +50 °C |
| Display | Optional LCD back-lit display (for D versions) showing measured value and unit |
| Power Supply | 24 VAC / DC |
| Protection Class | IP54 |
| Housing Material | ABS base with polycarbonate cover |
| Connection Ports | 5 mm and 6.3 mm pressure fittings |
| Weight | Approximately 150 g |
DPT-R8 Differential Air Pressure Transmitter
- The HK Instruments DPT-R8 is a high-precision, multi-range differential pressure transmitter designed for monitoring air and other non-aggressive gases in HVAC and building automation systems.
- It provides accurate and stable measurements of low pressure differences and is ideal for applications such as filter monitoring, airflow control, and room pressure supervision.
- The DPT-R8 offers eight field-selectable pressure ranges and multiple output options (voltage and current) in one device, making it flexible and easy to configure on-site.
The DPT-R8 offers a high level of accuracy and performance for pressure monitoring in HVAC systems. Its versatility allows for a wide range of applications, from measuring pressure differences in ventilation systems to controlling air dampers and monitoring clean room environments.
This transmitter can be configured with selectable pressure ranges, and it supports various output signals like 0-10 V, 2-10 V, and 4-20 mA, ensuring compatibility with many building automation and HVAC systems. Its small, durable design allows for easy installation and integration into existing setups.
The device is built to withstand harsh conditions, with protection against over-pressure and a wide operating temperature range. Its optional back-lit LCD display makes it easy to monitor readings directly on-site, and its reliable automatic zero calibration ensures minimal maintenance needs.
For building automation engineers, the DPT-R8 is a must-have tool for precise and reliable pressure monitoring, essential for maintaining HVAC system efficiency and ensuring air quality in controlled environments.
Applications include:
- Monitoring pressure drops across air filters and fans
- Measuring airflow in ventilation ducts and clean rooms
- Controlling air dampers and valves based on pressure difference
- Supervising room pressurization in laboratories or hospitals
- General HVAC and building automation system integration
Advantages:
- Multiple measuring ranges in a single device for flexible setup
- Simple configuration with DIP switches or jumpers
- High accuracy and long-term stability
- Fast installation with compact housing design
- Optional display for easy on-site reading
- Reliable automatic zero calibration for maintenance-free operation
Installation Notes:
- Mount the transmitter on a flat surface using screws or a mounting plate.
- Connect pressure tubes to the “+” and “–” ports correctly.
- Avoid installing in areas with high moisture or condensation.
- Allow the sensor to stabilize for a few seconds after power-up before calibration.
- Use the selectable jumper settings to choose the required range and output.