084G2100 Danfoss 4-20mA High Precision Pressure Transmitter

Product Overview

The 084G2100 (084G2100) is a precision-engineered industrial pressure transmitter designed for low-pressure monitoring and vacuum applications. Operating within a specialized range of -1 to 1.5 bar (-14.5 to 21.76 psi), this sensor provides critical feedback for closed-loop control systems in HVAC, water treatment, and industrial processing. The 084G2100 converts physical pressure into a highly stable 4-20 mA current signal, ensuring long-distance transmission without voltage drop or interference susceptibility. Built to endure rigorous environments, it features a robust IP65 enclosure and a temperature-compensated sensing element that maintains a typical accuracy of 0.5% FS, making it an essential component for optimizing system efficiency and preventing cavitation in pumping circuits.

Technical Configuration

The 084G2100 integrates advanced sensing technology with a versatile mechanical interface:

• Dual-Pressure Connection: Features a unique G 1/4 external and G 1/2 internal thread combination according to EN 228-1 standards, allowing for flexible mounting without additional adapters.

• Low-Pressure Precision: Optimized for the sensitive range of -1 to 1.5 bar, providing high resolution for vacuum and low-head pressure applications.

• Signal Integrity: A dedicated 4-20 mA output signal with a maximum response time of 4 ms allows the controller to react nearly instantaneously to pressure transients.

• Industrial Hardening: Capable of handling an overload pressure of up to 5 bar, protecting the internal piezo-resistive element against sudden system surges or water hammer.

Technical Specifications

Technical FAQs

How should the 4-20 mA loop be powered for optimal performance?

The 084G2100 operates on a supply voltage of 12 to 32 VDC. For most industrial PLC and DCS applications, a stabilized 24 VDC power supply is recommended. Ensure the total loop resistance (including wiring and receiver input impedance) does not exceed the drive capability of the transmitter at the minimum operating voltage.

What is the benefit of the compensated temperature range?

The transmitter is electronically compensated for temperatures between 0 and 70 deg C. This means the internal electronics actively correct for thermal expansion or contraction of the sensing diaphragm, ensuring the 1% maximum accuracy is maintained even as the ambient or medium temperature fluctuates.

Can this transmitter be used in applications with significant vibration?

While the transmitter is built for industrial use, the Pg 13.5 terminal block connection requires secure wiring. In high-vibration environments, ensure the cable is properly supported and that the internal terminal screws are tightened to prevent contact fatigue or signal intermittent loss.

Engineering & Installation Guide

• Mounting and Thread Sealing: When installing the G 1/4 or G 1/2 connection, use a bonded seal (Dowty washer) or appropriate thread sealant compatible with the medium. Avoid over-torquing, as the 084G2100 utilizes a precision sensing diaphragm that can be affected by extreme mechanical stress on the housing.

• Moisture Protection: To maintain the IP65 rating, ensure the Pg 13.5 cable gland is tightened firmly around the cable jacket. It is a best practice to form a "drip loop" in the cable before it enters the transmitter to prevent condensation or washdown water from following the cable directly into the terminal housing.

• Vacuum Application Shielding: Since this transmitter measures down to -1 bar (vacuum), ensure all upstream seals are airtight. Even a minor leak will result in erratic 4-20 mA signal fluctuations that do not accurately represent the process vacuum level.