Are you challenged by pressure readings that drift with temperature changes or require frequent recalibration? In critical processes and research, reliable pressure data is non-negotiable. The APT-Pressure Transmitter with automatic compensation is a digital pressure transmitter engineered to deliver exceptional accuracy and stability. Utilizing a fully welded diffusion silicon piezoresistive sensor, it provides precise measurement of liquids, gases, and vapors, making it the ideal choice for demanding applications in petrochemical, pharmaceutical, and industrial laboratories.

Why Choose an APT Pressure Transmitter? Solving Drift, Stability & Integration Challenges

Achieve unwavering confidence in your pressure monitoring with intelligent features that directly address common pain points.

• Eliminate Temperature-Induced Errors: Fluctuating environmental conditions can wreak havoc on sensor accuracy. This precision pressure transmitter features advanced automatic compensation for ambient temperature and zero drift. This ensures that your measurements remain accurate and reliable across a wide temperature range (-50°C to +85°C), without manual intervention.

• Unmatched Long-Term Stability for Critical Data: Stop questioning your data's integrity over time. The APT digital pressure transmitter is designed for extreme stability, guaranteeing that the basic error does not exceed the maximum range for 12 months. With a long-term stability of ±0.2% of URL over 15 years, you can trust the data from your process or experiment for decades.

• Flexible Connectivity for Modern Systems: Don't be limited by outdated output signals. This smart pressure transmitter offers a comprehensive suite of communication options. Choose from standard 4-20mA analog output, RS485 Modbus for digital integration, or even ZIGBEE wireless communication for remote monitoring. This flexibility ensures seamless integration into any new or existing control system.

Key Features for Demanding Applications

Engineered for longevity, precision, and ease of use:

• Exceptional Accuracy & Range: Achieve laboratory-grade measurements with accuracy up to ±0.025% of full scale. A remarkable turn-down ratio of ≥100:1 provides immense flexibility, allowing one transmitter to cover multiple pressure ranges.

• Rugged, Intelligent Design: The fully welded stainless steel sensor body with an isolation diaphragm ensures media compatibility and durability. The all-aluminum die-cast housing with an electrostatic spray coating is built for harsh environments.

• Intuitive Operation & Diagnostics: The integral LCD digital display eliminates parallax errors common with analog gauges. On-board buttons allow for easy on-site zeroing and configuration. The transmitter also features high/low pressure alarms and self-diagnostic functions.

• Inherent Safety & Isolation: Designed with high isolation between power, input, and output for reliable operation. It complies with IEC61000 standards for electromagnetic interference and is available with flameproof Exd II BT4/BT6 certification for hazardous areas.

Technical Specifications at a Glance

Performance & Accuracy

• Measurement Media: Liquids, Gases, and Vapors

• Accuracy (at reference conditions): ±0.025% F.S. / ±0.05% F.S. / ±0.1% F.S. / ±0.5% F.S. / ±1.0% F.S. (Selectable)

• Linearity: ±0.025%, ±0.05%, ±0.1%, ±0.5% of full-scale range

• Range (Turn-Down) Ratio: ≥100:1

• Response Time: ≤100 ms

Stability & Environmental Compensation

• Long-Term Stability: ≤ ±0.2% of URL over 15 years

• Annual Stability: Basic error does not exceed maximum range within 12 months

• Temperature Drift: ±0.015% F.S. / °C (Automatically compensated)

• Ambient Temperature Range: -50°C to +85°C

• Ambient Humidity: ≤95% RH

Outputs, Power & Communication

• Analog Output: 2-wire (4-20) mA (Standard)

• Digital Communication: RS485 Modbus

• Wireless Option: ZIGBEE

• Pulse Output: Available

• Power Supply: Low-power processing module (integral to 2-wire loop power)

• Alarm Functions: Configurable high-pressure and low-pressure alarms

Mechanical & Safety

• Sensor Element: Fully welded diffusion silicon piezoresistive sensor with stainless steel isolation diaphragm

• Wetted Parts Material: Stainless steel (connector)

• Enclosure Material: All-aluminum die-cast shell with electrostatic spray protective coating

• Electrical Isolation: High isolation between power, input, and output

• Explosion Proof: Flameproof Exd II BT4 / Exd II BT6

• Electromagnetic Compatibility: Complies with IEC61000 (Class III industrial site immunity)

Ready to Achieve Lab-Grade Pressure Stability in Your Process?

Whether you are monitoring a critical chemical reaction, managing a pipeline, or conducting long-term research, the APT delivers the precision and reliability you need.