With Absolute, Differential and Gage pressure sensors, the ND Series supports the broadest range of applications – some examples:
Air Quality Testing
Automated Safety Systems
Nuclear Power Monitoring
Pneumatic System Monitoring
Water Quality Testing
R & D
Air Pressure Monitoring
Calibration of Devices
Clean Room Access
Large Format Printers
Auto Smog Testing
Cabin Pressure Monitoring
Commercial Space Rockets
DHS Air Quality
Hospital Room Monitoring
ND Series – Product Families
All ND Series product families extends the operating temperature down to -20°C and up to 85°C, have integrated 50/60 Hz notch filters, exceptional zero stability, fast 2.25 ms response time and selectable bandwidth filters.
(Differential / Gage)
Supports pressure ranges as low as ±0.25 inH2O (±62.5 Pa) to as high as ±30 inH2O (±7.5 kPa).
The ND Low Pressure Series utilizes Multi-Range technology to support up to 7 pressures in one device.
Supports pressure ranges as low as ±0.5 psi (±34.5 mBar) to as high as ±150 psi (±10.3 Bar).
The ND Mid Pressure Series utilizes Multi-Range technology to support up to 7 pressures in one device.
Supports pressure ranges as low as 15 psia (1 Bar) to as high as ±150 psia (10.3 Bar).
The ND Absolute Middle Pressure Series for applications where you need to measure air and gas against absolute zero pressure.
QUICK PURCHASE LINKS
Select product requirements from table to see the order part number. In addition, view & download 3D Model in native CAD format.
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90° Port Adapters
Depending on your product design, you may need the ports facing to the sides instead of the top. Superior Sensors offers highly reliable, high quality adapters that plug into the two ports of our pressure sensors for easy implementation. With these 90° adapters, there is no need to worry about z-height.
Superior Sensors offers two variations of 90° adapters – right angle and right angle radial.
KP-RAR-50: right angle radial
KP-RAA-50: right angle
Adapters are offered in packages of 50.
Email us at firstname.lastname@example.org for more information or to purchase.
One device can support up to 7 different pressure ranges from 62.5 Pa (0.25” H2O) to 150 PSI (10.3 Bar) across the differential version of the ND Series, and each pressure range is factory calibrated and optimized ensuring no degradation in a total error band, accuracy or stability regardless of the range selected. This eliminates the complexity and headaches of working with multiple sensors.
Instead of having to research, purchase and design-in multiple parts, a single Multi-Range part simplifies both the design and manufacturing of a product. Designing in the same part throughout your designs is much more efficient than having to select multiple components. When you design in each of the Superior Sensor pressure sensors, the setting of the pressure is done via a single software command. It’s that simple. Add the fact that there is only one product to inventory, and your manufacturing team will also appreciate the value of Multi-Range!
Benefits of Multi-Range Technology include:
Closed Loop Control adds capabilities to set and maintain flow rates via pressure management by directly controlling motors, valves and actuators. Superior Sensors offers the option to have this capability integrated into the sensor in order to more effectively set and maintain flow rates by directly controlling motors, valves and actuators to maintain flow rate targets.
The integrated Closed Loop Control design significantly reduces loop delays in the electronic circuit by up to 100x. This integrated solution also eliminates the need to design and implement a complex control loop system, resulting in more efficient, more reliable and less costly products. Closed Loop Control is of extreme value in medical respiratory devices such as ventilators and CPAP, as well as in air quality measurement products.
The figure below shows a block diagram of an implementation of the Superior Sensor Closed Loop Control for an air quality application. In order to effectively measure the air quality, we require maintaining a constant/known airflow through the viewing window. The differential pressure across the venturi directly measures the flow into this viewing window. The system sets a target pressure level across the venturi and the differential pressure sensor automatically increases or decreases the drive to the pump to maintain the targeted differential pressure, ensuring a constant airflow into the viewing window. This is accomplished with the NimbleSense closed loop circuit used in combination with the company’s proprietary noise filtering, resulting in greater than 100x reduction in loop delay.
Benefits of the integrated Closed Loop Control include:
Superior Sensor’s advanced digital filter is a multi-order filter that utilizes advanced filtering capabilities on the front-end of the sub-system to eliminate critical noise created by fans, blowers or other dry air/gas sources prior to reaching the pressure sensing sub-system. The NimbleSense advanced filtering capability removes sensor induced mechanical noise before it becomes an error signal that can adversely impact overall system performance. In customer deployments where our sensor replaced a competing component, we have seen greater than 10x reduction in sensor induced noise, thus greatly improving the SNR of the sensor output. In very low pressure systems, the improvement is even more significant.
Incorporating both standard and optional digital filters, this feature provides significantly better noise reduction and eliminates the need to design an external filtering system, resulting in more efficient, more reliable and less costly products. Our advanced digital filtering is optimized for each application to ensure mixed sampling noise is kept well below the noise floor. By removing the mechanical noise, we maximize overall system performance.
The example below is of a 4th order FIR filter customized to block pump noise above 50 Hz, which has noise of equal magnitude as the signal of interest. The lower graphs show the resulting impact of the advanced digital filtering.
Benefits of the advanced digital filtering technology include:
As all of Superior’s pressure sensors have an extremely low noise floor, theoretically power line interference can be ‘heard’ when taking measurements. The integrated 50Hz/60Hz notch filter eliminates this noise so you maintain the advantage of having such a low noise floor pressure sensor without any external interference. With the notch filter seamlessly integrated in the pressure sensor module, the sensor blocks out the interference caused by these frequencies before it reaches the user application. Further, as the notch filter is internal to the sensor module, it eliminates the need for an engineer to design and implement an external notch filter. This feature removes an external notch filter, so the overall system is more efficient, more reliable and less costly.
Benefits of the integrated 50/60Hz Notch Filter include:
A pressure switch is a mechanical or electronic device that is activated when a certain pressure threshold or set point is reached. These failsafe response components instruct the system to perform an action if a certain pressure threshold is met.
Types of Pressure Switches
Fixed Pressure Switches
As their name implies, fixed pressure switches have pre-set, non-changeable pressure thresholds that are set by the pressure switch manufacturer. The device maker receives the pressure switch already configured and cannot change values. Examples where fixed pressure switches are common are certain types of medical devices, such as ventilators.
Variable Pressure Switches
With variable pressure switches, the threshold value can be set either by the device maker or dynamically in the field. If it is controlled by the device maker, when they build their product they select certain resistor pairs that control the voltage input that determines the threshold. Once they build the product, the threshold value cannot be changed.
In cases where the threshold can be set in the field, this is typically done via software or a mechanical knob/switch. In this scenario, the pressure switch is usually not implemented as a safety feature. A good example is with air filters – where depending on the system implementation, the threshold value needs to be adjusted to account for any head loss in the flow stream.
Superior Sensor’s pressure switch changes state depending on the measured pressure being above or below a certain threshold. This can be used as a fast response failsafe feature for overpressure conditions, and to provide other simplified on/off system feedback. However, unlike other more common pressure switches, the Superior Sensor pressure switch includes three modes for setting threshold pressure, one fixed and two variable:
Benefits of Superior’s integrated pressure switch include:
UAV Application Video
ND Series Benefits Summary