Pressure Instruments
Pressure transmitter with diaphragm seals and coiled sensor cable.
Intelligent Pressure Transmitter
智能压力变送器
The NH3151 series pressure/differential pressure/level transmitters are the latest generation of intelligent digital measuring instruments. They adopt high-precision silicon sensor technology and feature high accuracy, good stability, strong anti-interference performance, and a user-friendly interface. Parameters can be set and modified through on-site button operations or remote HART fieldbus communication. It is functionally rich and has a wide range of applications, making this transmitter highly suitable for industrial needs. Despite having numerous setting options, the operation remains simple and easy to master.

The NH 3151 series is specially designed for high-stability measurement applications, with a maximum working pressure of up to 100 MPa (depending on the specific configuration).
· It can achieve functions such as migration, range adjustment, zero adjustment, damping, and data recovery.
· It adopts the internationally leading direct digital frequency synthesis (DDS) technology to achieve high precision.
· It is truly fully isolated, with an isolation voltage between the sensor and the main circuit reaching up to 1500 VDC.
· It is equipped with comprehensive anti-interference devices and multiple-level protection circuits to ensure high reliability in the field.
· There is also a PROFIBUS-PA protocol product available as an option, with the same functional indicators, and it can be connected to the Siemens S7 system.

Blue industrial gas detector with a white sensor housing and threaded metal connection.
Economic Pressure Transmitter
经济型压力变送器
The industrial type pressure transmitteradopts high-performance imported silicon piezoresistive chips, combined with advanced circuit anti-interference processing and temperature compensation technology. It converts the pressure variable into stable linear currents of 4-20mA or 0-10V. It can be optionally equipped with RS485 protocol or HART communication protocol.

Product features: The product adopts a low-copper cast aluminum alloy housing. The pressure connection head materials can be selected from various options, and the liquid contact diaphragm materials can also be chosen from multiple options. Customized products with various parameter requirements can be made. This product is applicable to various measured media in gaseous or liquid state, including gauge pressure, absolute pressure and sealed gauge pressure.

Widely applicable to:※ Aerospace ※ Energy engineering ※ Pharmaceutical industry ※ Food industry ※ Constant pressure water supply.

Technical Specifications:
Power supply voltage: 24VDC (15~36V)
Output type: 4-20mA/0-10V, optional with 485 communication or HART
Accuracy level: 0.25%/0.1%/0.075% selectable
Shell material: Low copper cast aluminum with anti-corrosion coating
Process connection: Various options/see label
Display mode: 5+1/2 digit LCD liquid crystal display
Temperature range: -30~80℃
Temperature drift: ±0.02% (within the compensation range)
Overload pressure: 2 times full scale
Response frequency: 10Hz
Insulation resistance: 100mΩ@100V
Impact resistance: 20g, 11ms
Vibration resistance: 10g, 20Hz~2000Hz
Explosion-proof level: conventional/enclosed/ flameproof Ex db II CT6 Gb selectable
Protection level: IP65/66/68 selectable
Digital pressure gauge with blue casing and red LED display.
Intelligent Pressure Controller
智能压力控制器
Product Overview
The intelligent pressure controller is an intelligent digital pressure measurement and control product that integrates pressure measurement, display, output, and control. Through microprocessor processing, it provides on-site display and can output up to four digital signals and one analog signal.
The intelligent pressure controller can replace most mechanical switch-based applications. It is widely used in industries such as hydropower, water supply, petroleum, chemical engineering, machinery, and hydraulics, for on-site measurement, display, and control of fluid media pressure.

Product features
1. Four LED displays the current pressure value, ignoring the domain error.
2. Four control points can be set on-site to set the high and low pressure or liquid level alarm points. The delay time for switching output can be set by yourself, and it is output to the control equipment through relays.
3. Button adjustment and on-site setting of high and low limit values and alarm parameters.
4. There is no dead zone in pressure regulation, and the relay action can be set arbitrarily within the entire measurement range.
5. The pressure point uses button adjustment to set the action pressure, which is simple and convenient.
6. It adopts high-precision AD and high-speed processor, and is fully digitalized design.
7. Optional output switch quantity form and input power supply.
8. One analog output (4-20mA, optional), or one RS485 output (optional).
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