Ideal for HVAC, clean-room and flow measurement applications, the NP785 is an ultra low differential pressure transmitter for measuring very small over-pressure, under-pressure and differential pressure in neutral, non-corrosive gaseous media — DIN rail mounted, with a configurable analogue output (0-10V or 4-20mA), integrated RS485 Modbus, alarm output, USB configuration, a diagnostic LED, and a choice of pressure ranges. It provides a pressure-proportional linear signal output with a configurable measuring range set via USB using the configuration software.
NP785 can operate bi-directionally, providing the ability to measure differential pressure ranges from vacuum to positive pressure. It is housed in a DIN rail mountable ABS/PC enclosure and its nickel plated brass fittings accept pneumatic hoses with 4 or 6mm internal diameter.
The analogue output can be set to either 0-10V or 4-20mA while having RS485 with Modbus RTU communication protocol. Designed for HVAC and industrial environments, the NP785 ensures temperature compensation for long-term stability and complies with EMC standards, providing robustness and reliability for a wide range of applications.
SigNow is the latest free software from Novus for calibration and monitoring of sensor products.
✅ 3 Year Manufacturer Warranty — backed by our UK-based technical support
Novus NP785 Datasheet Download
Technical Details
Mounting: DIN rail. Enclosure: ABS/PC. Fittings: nickel plated brass, 4 or 6mm ID hose
Output: configurable 0-10V or 4-20mA. Communication: RS485 Modbus RTU. Configuration: USB (SigNow software)
Diagnostics: diagnostic LED, alarm output
Available pressure ranges: ±50 Pa, ±100 Pa, ±5 mbar, ±20 mbar, ±68 mbar, ±400 mbar, ±1000 mbar (contact us to order ranges not listed above)
Frequently Asked Questions
Can this measure vacuum as well as positive pressure?
Yes — it operates bi-directionally, so it can measure differential pressure ranges from vacuum through to positive pressure.
Which pressure range should I choose?
Pick the range that best matches your expected differential — 7 ranges are available from ±50 Pa up to ±1000 mbar; contact us if you need a range not listed.
Do I need special software to configure it?
SigNow is Novus's free calibration and monitoring software, used via USB to set the measuring range and check diagnostics.
Industry Applications
- HVAC Systems — monitors filter differential pressure and airflow across ducting.
- Clean Rooms — precise low-pressure differential monitoring for room pressurisation control.
- Flow Measurement — differential pressure signal for orifice or venturi flow calculations.