STG21 Miniature Pressure Transmitter

The STG21 Miniature Pressure Transmitter is a high-performance solution designed for industrial applications with limited installation space. It features a stainless steel isolated diaphragm with a piezoresistive silicon sensor, combined with laser trimming temperature compensation technology, ensuring high accuracy and long-term stability across a wide temperature range from -40°C to +125°C. With a robust all-stainless-steel construction, the STG21 offers excellent resistance to shock and overload, supporting pressure ranges from 0 to 700 Bar in both gauge and absolute measurement modes. The transmitter provides multiple standard output signals, including 4-20mA, 0-5V, 1-5V, and 0.5-4.5V, and operates with 12VDC or 24VDC power supply, making it easy to integrate into various industrial systems. Compliant with EMC standards and subjected to rigorous testing and aging processes, the STG21 ensures reliable long-term performance. It is widely used in construction machinery, railway braking systems, hydraulic systems, semiconductor equipment, medical devices, and automation control applications, making it an ideal choice for demanding environments requiring compact size, durability, and precision.

1. Key Features

All stainless steel construction with excellent resistance to shock and pressure impact
Piezoresistive silicon sensing element for high accuracy and stability
Compatible with 316L media
Compliant with EMC protection requirements

2. Technical Specifications

General Electrical Data

Pressure Range	0–6 to 700 bar
Pressure Type	Gauge / Absolute
Output signals	4–20mA, 0–5V, 1–5V, 0.5–4.5V
Supply Voltage	12 VDC / 24 VDC

Performance Specifications

Accuracy	±0.5%F.S.,±0.2%F.S.
Long-term Stability	≤±0.1%F.S./year
Overpressure	150%F.S.
Burst Pressure	300%F.S.
Temperature Compensation Range (accuracy maintained within this range)	-20°C to +85°C, -40°C to +125°C
Operating temperature range	−40 to +125°C
Storage temperature range	−40 to +125°C
Media Temperature Range	-40°C to +125°C

3. Applications

Railway braking systems
Wind power hydraulic systems
Construction machinery
Hydraulic presses
Medical equipment
Semiconductor equipment
Hydraulic systems
Environmental protection equipment

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 applications is the STG21 miniature pressure transmitter suitable for?

The STG21 is widely used in construction machinery, railway braking systems, hydraulic systems, semiconductor equipment, medical devices, refrigeration systems, and industrial automation, especially in space-constrained applications.

Q2: What output signals does the STG21 pressure transmitter support?

It supports multiple standard outputs including 4-20mA, 0-5V, 1-5V, and 0.5-4.5V, making it compatible with various industrial control systems.

Q3: What is the pressure range of the STG21 sensor?

The STG21 offers a pressure measurement range from 0~6 up to 700 Bar, with both gauge and absolute pressure options available.

Q4: Can the STG21 operate in harsh environments?

Yes, it operates reliably within a wide temperature range of -40°C to +125°C and features IP67 protection, making it suitable for demanding industrial environments.

Q5: What is the accuracy of the STG21 pressure transmitter?

The overall accuracy is ±0.5% F.S (optional ±0.2% F.S), with long-term stability better than 0.1% F.S per year.

Q6: What media can the STG21 measure?

It is suitable for gases and liquids that are compatible with stainless steel 304 and 316L, such as water, oil, and common industrial media.

Q7: Is customization available for the STG21?

Yes, customization is available for pressure range, output signals, and mechanical connections (e.g., G1/4 or other thread types).

6. Related Products

STG53 Compact Pressure Transmitter

7. Contact Us

📧 Email: sales@yatansensor.com, support@yatansensor.com

💬 WhatsApp:+86 185 1660 2370

8. Model Selection / Ordering Code

Please specify the full ordering code when requesting a quotation.

        Model - Range - Output - Accuracy - Electrical Interface - Connector - Cable Length - Supply Voltage

        Example:
        STG21 - 0~100bar - 4-20mA - 0.5%- G1/4 - M12 - 1m - 24V

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