HART Protocol Pressure Transmitters

-- Steady & Reliable Manufacturer --

Brief Description

Our HART Protocol Pressure Transmitters combine analog reliability with digital sophistication. They provide a stable 4-20mA current signal for control, while simultaneously carrying digital communication for remote configuration, diagnostics, and calibration.

In-depth Overview

The Highway Addressable Remote Transducer (HART) Protocol is the global standard for smart field devices. These transmitters enable users to perform advanced tasks such as re-ranging, self-diagnostics, and monitoring of the sensor health from a control room or hand-held device. This feature significantly reduces the need for manual field checks, improving operational efficiency and minimizing downtime in complex process systems. They are typically microprocessor-based, ensuring high accuracy and stability over time.

Specification

Parameter	Details
Output Signal	4-20mA DC with superimposed HART Protocol
Accuracy (FSO)	Typically ±0.075% to ±0.1% of Span
Pressure Type	Gauge, Absolute, or Differential
Wetted Parts Material	Stainless Steel 316L, Hastelloy C (Optional)
Power Supply	12 to 45 VDC (Two-wire system)
Communication	HART 7.0 (or newer)
Ambient Temp. Range	-40°C to +85°C
Configuration	Via HART Communicator or Control System Software

Applications

Oil & Gas Refineries: Remote monitoring and diagnostics of critical pipeline pressures.
Power Generation: Precise pressure measurement in steam and cooling water loops.
Water and Wastewater Treatment: Level and pressure monitoring in remote pumping stations with existing HART networks.
Pulp and Paper Mills: Applications requiring digital calibration checks without interrupting the 4-20mA control loop.

Key Advantages

Remote Diagnostics: Check sensor health, temperature, and drift from the control room, reducing field trips.
Enhanced Accuracy: Digital communication allows for finer tuning and re-ranging of the output span.
Backward Compatibility: Integrates seamlessly with existing legacy 4-20mA infrastructure.
Multi-Variable Sensing: Select models can transmit process pressure, sensor temperature, and device status simultaneously.

Payment and Shipping

We process international orders efficiently. Payment via wire transfer (T/T) is standard, with secure online payment methods available for smaller orders. We prioritize fast and secure air freight (DHL, UPS) for these sensitive electronic instruments, offering detailed tracking and full insurance coverage to the final destination. Delivery timelines are confirmed upon receipt of the final order confirmation.

Frequently Asked Questions

Q: Do I need a special cable for HART communication?
A: No, HART uses the existing two wires for the 4-20mA loop. A standard shielded cable is sufficient, but a HART Field Communicator (handheld device) or a PC with specific software is required to access the digital data.

Q: Can I change the pressure range without removing the transmitter?
A: Yes. One of the main benefits of HART is the ability to remotely re-range the device digitally via the protocol, significantly minimizing process disruption.

Q: What is the typical accuracy of a HART transmitter?
A: They typically offer reference accuracy between ±0.075% and ±0.1% of the calibrated span, making them suitable for high-precision control loops.

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HART Protocol Pressure Transmitters Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.