STG51 Smart Differential Pressure Transmitter

The STG51 Smart Differential Pressure Transmitter is engineered with advanced monocrystalline silicon sensor technology and patented encapsulation, delivering high accuracy, excellent stability, and strong anti-interference performance. It is widely used in industries such as petrochemical, power generation, food processing, pharmaceuticals, and machinery manufacturing. This transmitter supports differential, gauge, and absolute pressure measurements, enabling precise monitoring of flow, level, density, and vacuum. Featuring a dual overload protection diaphragm and surge protection circuitry, it ensures reliable operation under high static pressure and harsh conditions. The STG51 provides 4–20mA analog output with HART communication, and supports multiple protocols including Modbus, CANopen, and RS232 for seamless system integration. With a wide measurement range from 0–0.2 kPa up to 3 MPa and accuracy up to ±0.075% F.S., it meets demanding industrial requirements. Equipped with a backlit LCD display and supporting both local and remote calibration, along with explosion-proof housing and lightning protection design, the STG51 is an ideal solution for industrial automation and process control systems.

1. Key Features

Advanced monocrystalline silicon differential pressure sensor
Two-wire system with 4–20 mA analog output and HART digital communication
Wide measuring range from 0–0.2 kPa up to 3 MPa
Explosion-proof housing with strong resistance to variable frequency interference
High static pressure and overload protection capability
Built-in lightning and surge protection circuit
Intelligent LCD display with backlight
Supports both remote transmission and local zero/span adjustment
Full range of models with high accuracy and excellent stability

2. Technical Specifications

General Electrical Data

Pressure Range	0 to -100kPa / 0 to 0.2kPa / up to 3MPa
Measurement Type	Gauge pressure, differential pressure
Output Signals	4–20mA, 4–20mA with HART® protocol (10.5–36VDC, typical 24–34V)
Overpressure Limit	16MPa

Performance Specifications

Accuracy	0.1%F.S., 0.075%F.S.
Long-term Stability	≤ ±0.2%F.S./year
Zero Temperature Drift	±0.25% F.S. /55°C
Full Scale Temperature Effect	±0.5% F.S. /55°C
Operating Temperature	-30°C to +80°C (LCD version: -30°C to +70°C)
Storage Temperature	-40°C to +85°C
Media Temperature	-40°C to +104°C
Explosion-proof Rating	Exd II BT6 Gb

3. Applications

Petrochemical Equipment
Food processing equipment
Power generation equipment
Paper and pulp industry
Medical equipment
Machinery manufacturing
Special-purpose industrial equipment
Scientific research and laboratory applications
Metallurgical Equipment
Other industrial applications

4. Selection Guide

Pressure Sensor Selection Key Points: Confirm the measuring range, match the output signal, ensure media compatibility, select the appropriate mounting interface, and define the accuracy requirements.

5. FAQ (Frequently Asked Questions)

Q1: What can the STG51 Smart Differential Pressure Transmitter measure?

The STG51 Smart Differential Pressure Transmitter can measure differential, gauge, and absolute pressure. It is widely used for flow, level, density, and vacuum measurement in industrial applications.

Q2: What is the accuracy of the STG51 Smart Differential Pressure Transmitter?

The STG51 offers high accuracy up to ±0.075% F.S., with excellent long-term stability of ≤±0.2% F.S. per year, making it suitable for precision industrial measurements.

Q3: What output signals does the STG51 Smart Differential Pressure Transmitter support?

It supports 4–20mA analog output with HART communication, and optional protocols such as Modbus RTU, CANopen, and RS232 for flexible system integration.

Q4: In which industries is the STG51 Smart Differential Pressure Transmitter used?

The STG51 is widely used in petrochemical, power generation, food processing, pharmaceutical, paper, metallurgy, and machinery industries.

Q5: Is the STG51 Smart Differential Pressure Transmitter explosion-proof?

Yes, it features an explosion-proof design with Exd II BT6 Gb rating, making it suitable for hazardous and explosive environments.

Q6: What is the pressure range of the STG51 Smart Differential Pressure Transmitter?

The measurement range spans from as low as 0–0.2 kPa up to 3 MPa, covering both low and high-pressure applications.

Q7: Does the STG51 Smart Differential Pressure Transmitter support calibration?

Yes, it supports both local calibration via LCD display and remote configuration through communication protocols.

Q8: What is the overload and pressure limit of the STG51?

The transmitter is designed with high static pressure resistance and overload protection, with a maximum overpressure limit of 16 MPa.

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