■ ERS.306 High Precision Pressure Transmitter

- High-precision pressure measurement with accuracy ≤ ±0.05% F.S @ RT (20~25°C)

- Digital Nonlinearity ≤ ±0.02% F.S

- RS485 (Half-duplex) / Modbus RTU communication

- 4~20 mA and various voltage outputs available with RS485

- Wide pressure range from -1~0 bar to 0~1000 bar

- Stainless Steel 316L wetted parts and sensor diaphragm

- IP67 protection rating

■ Product Overview

The ERS.306 is a high-precision pressure transmitter designed for test, calibration, and industrial environments requiring precise measurement. It provides an accuracy of ≤ ±0.05% F.S at room temperature (RT 20~25°C), including nonlinearity (BFSL), pressure hysteresis, non-repeatability, zero-point deviation, and amplification deviation. With Modbus RTU communication via an RS485 interface and analog outputs including 4~20 mA, 0~10 V, 0~5 V, and 1~5 V, the ERS.306 can be flexibly integrated into precision measurement and data acquisition systems.

■ Key Differentiators

① High Precision Accuracy ≤ ±0.05% F.S
As a key performance feature of the ERS.306, it provides accuracy of ≤ ±0.05% F.S at RT 20~25°C. It is ideal for applications where minimal measurement error is critical, including laboratories, test benches, gauge standards, and precision measurement systems.

② Digital Nonlinearity ≤ ±0.02% F.S
With digital nonlinearity of ≤ ±0.02% F.S based on BFSL, the ERS.306 enables highly precise pressure data acquisition through its digital signal.

③ Analog Output + RS485 / Modbus RTU
RS485 communication can be combined with 4~20 mA or various voltage outputs, allowing integration with both conventional analog systems and digital communication systems.

④ Precision Performance Across Temperature Variations
The Total Error Band is specified as ≤ ±0.1% F.S at 10~40°C and ≤ ±0.15% F.S at -10~80°C, providing defined precision performance across varying temperature conditions.

■ Applications

▶ Laboratory Precision Measurement

▶ Test Benches

▶ Gauge Standards

▶ Precision Pressure Measurement

▶ Industrial Precision Measurement Systems

■ Options

▶ RS485 + 4~20 mA / 0~10 V / 0~5 V / 1~5 V

▶ -40~+125℃ Operating Temperature

▶ Absolute Pressure Range

▶ M12 Plug 90°

▶ Cable Extension

▶ Restrictor Screw

▶ Stainless Steel Tag Plate

▶ Manufacture Calibration Certificate

▶ KOLAS ILAC-MRA Calibration Certificate

■ General Specifications

Pressure Ranges	-1…0 bar to 0…1000 bar
Accuracy	≤ ±0.05% F.S @ RT (20~25℃)
Communication	RS485 (Half-duplex) / Modbus RTU
Analog Output	4~20 mA, 2-wire 0~10 V / 0~5 V / 1~5 V, 3-wire
Electrical Connection	M12 Plug, Straight M12 Plug, 90°
Process Connection	G1/4 / G3/8 / G1/2 / R1/4 / R3/8 / R1/2
Operating Temperature	-20~+100℃ Option: -40~+125℃
Resolution	0.0005% F.S (Digital)
Signal Stability	0.0025% F.S (Digital noise-free)