MBS 3000 060G1121 Danfoss Low Pressure Transmitter

Product Overview

The 060G1121 (060G1121) is a precision-engineered low-pressure transmitter within the high-performance Danfoss MBS 3000 series. Designed for high-accuracy measurement in ranges from 0 - 1 bar, this sensor is a staple in HVAC systems, tank level monitoring, and low-pressure pneumatic circuits. By converting gauge pressure into a stable 4 - 20 mA analog output, the 060G1121 allows for granular control over sensitive industrial processes. Its robust stainless steel housing and excellent vibration stability make it a reliable choice for demanding environments such as power plants and chemical processing facilities, where maintaining specific pressure thresholds is critical to preventing system failures and ensuring operational safety.

Suffix Breakdown

The 060G1121 model code identifies the following technical configurations:

• 060G: Commercial prefix for the Danfoss industrial sensor portfolio.

• 10: Indicates the specific low-pressure measuring range of 0 to 1 bar.

• 1: Specifies Gauge (relative) pressure reference, measuring against ambient atmosphere.

• 1: Industry-standard 4 - 20 mA output signal for long-distance transmission with low noise interference.

• 1: Electrical connection via a Plug Pg 9 (EN 175301-803-A), providing a secure and replaceable interface.

• AB04: Mechanical connection utilizing the G 1/4 A (EN 837) thread standard.

Technical Specifications

Technical FAQs

Can the 060G1121 be used for vacuum measurement?

The 060G1121 is calibrated for 0 - 1 bar gauge pressure. While it can physically withstand a vacuum, it is not designed to provide accurate linear output for negative pressure values. For vacuum applications, a dedicated vacuum or compound range transmitter should be selected.

Is this model suitable for media temperatures exceeding 85 deg C?

The standard operating limit is 85 deg C. If your process media exceeds this, it is highly recommended to use a syphon tube or a long capillary to dissipate heat before the media reaches the sensor diaphragm.

What happens if the power supply polarity is accidentally reversed?

The 060G1121 includes integrated reverse polarity protection. This prevents damage to the internal electronics if the loop wiring is incorrectly connected during commissioning.

Engineering & Installation Guide

Low-Pressure Accuracy & Venting:

Since the 060G1121 is a gauge pressure transmitter in a low-pressure range (1 bar), accuracy is highly dependent on proper atmospheric venting. Ensure that the Pg 9 plug and the cable used do not completely hermetically seal the reference port. The internal venting mechanism must be able to "breathe" to account for changes in local barometric pressure, which could otherwise cause a zero-point shift in such a sensitive range.

Wiring and Shielding:

For optimal performance, use a shielded cable for the 2-wire 4 - 20 mA loop. In 0 - 1 bar applications, even minor electromagnetic interference (EMI) can represent a significant percentage of the total measured range. Connect the shield to the ground terminal of the PLC or DCS, ensuring it is not grounded at the sensor end to avoid potential ground loop currents that could distort the pressure reading.