Smart Pressure Transmitter NP30 | Digital Pressure Controller with Switch

Brand：NOIKE-AH
Model：NP30 Series

Specification

Smart Pressure Transmitter NP30

Product Overview

The Smart Pressure Transmitter NP30 with switch is an intelligent pressure monitoring device that integrates pressure measurement, digital display, signal output, and switch control into a compact unit. Designed for industrial automation and hydraulic applications, it delivers stable pressure measurement with a fast response time and reliable switching performance.

Featuring a bright 0.56-inch digital display, the NP30 provides real-time pressure readings while supporting 4–20 mA analog output and dual relay outputs for process monitoring and equipment control. Its compact design, robust 304 stainless steel pressure interface, and intelligent digital circuitry make it suitable for demanding industrial environments.

Product Features

Integrates pressure measurement, display, output, and control
High stability with fast response performance
Bright 0.56-inch digital LED display
Dual relay outputs for pressure control
Standard 4–20 mA analog output
Intelligent digital signal processing
Suitable for hydraulic and industrial automation systems
304 stainless steel pressure interface
Compact and easy-to-install design

Applications

Industries

Hydraulic Systems
Industrial Automation
Machinery Manufacturing
Process Control
Equipment Monitoring

Typical Applications

Hydraulic pressure monitoring
Pump control
Pressure alarm systems
Industrial equipment protection
Automated process control

Technical Specifications

Parameter	Specification
Pressure Range	0–100 MPa
Pressure Type	Gauge Pressure
Accuracy	±0.5% FS
Overload Capacity	200% FS
Long-term Stability	≤0.1% FS/year
Supply Voltage	24 VDC ±20%
Display	0.56-inch Digital Tube
Display Range	-1999 to 9999
Response Time	<30 ms
Operating Temperature	-20°C to +70°C
Relative Humidity	≤80% RH
Pressure Connection Material	304 Stainless Steel
Output Signal	4–20 mA + 2 Relay Outputs

Electrical Connection

The NP30 provides:

4–20 mA analog output
Two relay outputs
8-pin terminal connection

Please refer to the terminal definition table supplied with the product for wiring details.

Installation Notes

Use a 24 VDC power supply as specified.
Keep signal cables separated from high-voltage or high-current cables.
Avoid close parallel routing with power cables to minimize electromagnetic interference.
Select an appropriate alarm response speed according to the application. Faster settings improve response time, while slower settings provide better filtering against transient signal fluctuations and electrical interference.

Maintenance

The Smart Pressure Transmitter NP30 with switch is designed to be maintenance-free under normal operating conditions.

If repair is required, it should be performed only by the manufacturer.

Cleaning

To maintain the appearance and readability of the instrument:

Recommended Cleaning Agents

Clean water
Mild dishwashing detergent

Do Not Use

Aggressive chemical cleaners
Abrasive cloths or sponges
Hard or sharp cleaning tools

Clean the instrument surface using a soft, damp cloth.

Why Choose the Smart Pressure Transmitter NP30 ?

Reliable pressure monitoring is critical for maintaining equipment safety and process stability. The NP30 combines pressure sensing, digital display, analog output, and relay control in a single compact device, helping simplify installation and system integration.

Integrated Pressure Monitoring and Control

Measurement, display, signal output, and relay switching are integrated into one device, reducing the need for additional control components.

Fast and Stable Performance

A response time of less than 30 ms enables timely pressure monitoring, while intelligent digital processing helps maintain stable operation.

Flexible Automation Integration

The combination of 4–20 mA analog output and dual relay outputs allows easy connection with PLCs, control panels, and industrial automation equipment.

Easy Operation

The large digital display provides clear pressure readings, allowing operators to monitor system status conveniently.

Designed for Industrial Environments

With a 304 stainless steel pressure interface, stable long-term performance, and compact construction, the NP30 is suitable for hydraulic and industrial pressure control applications.

Parameters

Table 1 Parameter list

Dimensions

Electrical wiring and settings

1）Output signal

a) 4…20mA+2 Relays。
b) 8-pin terminal. The terminal definition is shown in Table 2 below

Table 2 Terminal definition

CAUTION

1) When installing the connecting cable, the power supply 24VDC to the pressure controller should be separated from the strong current cable and try to avoid parallel wiring at close distances.

2) Based on the anti-interference principle of digital circuit AD sampling, solemnly remind users that the alarm speed of the controller is not as fast as possible. The selection of the alarm speed should be based on the need, in the balance between speed and stability. When the alarm speed is selected quickly, accidental fluctuations in the pressure signal or accidental interference burrs on the power supply may cause frequent alarms after being collected by the digital circuit. When the alarm speed is selected relatively slowly, the digital circuit can have sufficient time to correct The signal is subjected to interference removal filtering, and the stability can be greatly improved.

Maintenance and cleaning

6.1 Maintenance

This pressure switch is maintenance-free.

Repairs must only be carried out by the manufacturer.

6.2 Cleaning

Unsuitable cleaning agents

Cleaning with unsuitable cleaning agents may damage the instrument and the product label.

▶ Do not use any aggressive cleaning agents.

▶ Do not use any hard or pointed objects.

▶ Do not use any abrasive cloths or sponges.

Suitable cleaning agents

■ Water

■ Conventional dishwashing detergent

Cleaning the instrument

Wipe the instrument surface using a soft, damp cloth.

Application Case

Hydraulic Pressure Monitoring for Industrial Equipment

In hydraulic systems, maintaining stable pressure is essential for protecting equipment and ensuring consistent process performance. The NP30 Smart Pressure Transmitter with Switch can be installed directly on hydraulic pipelines or pressure manifolds to provide continuous pressure monitoring and switching control.

During operation, the transmitter measures system pressure in real time and displays the current value on its digital screen. At the same time, the 4–20 mA output transmits pressure data to a PLC or control system, while the dual relay outputs can be configured for high-pressure or low-pressure switching functions. These outputs may be used to trigger alarms, control pumps, or activate protective interlocks according to system requirements.

Its fast response, compact structure, and integrated measurement and control functions make the NP30 a practical solution for hydraulic machinery, automated production equipment, industrial process control, and pressure monitoring applications requiring reliable switching and real-time pressure indication.

Frequently Asked Questions (FAQ)

1. What functions does the NP30 provide?

The NP30 integrates pressure measurement, digital display, analog output, and dual relay switching functions into one device.

2. What pressure range is available?

The pressure measuring range is 0–100 MPa.

3. What output signals are supported?

The transmitter provides:

4–20 mA analog output
Two relay outputs

4. What is the response time?

The response time is less than 30 ms.

5. What power supply is required?

The recommended power supply is 24 VDC ±20%.

6. Is the instrument suitable for hydraulic systems?

Yes. The NP30 is designed for hydraulic applications as well as industrial automation and pressure monitoring systems.

7. Does the device require regular maintenance?

No. The instrument is designed to be maintenance-free during normal operation.

8. How should the instrument be cleaned?

Use a soft damp cloth with clean water or mild detergent. Avoid aggressive cleaners, abrasive materials, and sharp tools.