Melexis has introduced new low-pressure variants of its Triphibian pressure sensors, extending the family down to configurable pressure spans starting at 2 bar. The devices retain the family’s ability to measure gas, liquid, and frozen media and are intended for lower-pressure coolant loops in EV thermal management and liquid-cooled data centers.
The new variants are available across the MLX90830, MLX90833, and MLX90834. Existing Triphibian devices support pressure measurement up to 70 bar for applications including refrigeration loops and oil measurement. The additional 2 bar and 4 bar ranges bring the same sensing approach to systems using lower-pressure media, including glycol-based coolants.
Suspended-Cantilever MEMS Sensing
Triphibian sensors use a suspended-cantilever MEMS pressure sensing element designed for direct contact with gas, liquid, and frozen media. This differs from pressure sensing arrangements that require the sensing element to be isolated from the measured medium.
For the new variants, Melexis combines the MEMS element with signal processing, conditioning, and an output driver in a factory-calibrated SOIC16 wide-body package.
The lower pressure ranges are aimed at coolant circulation monitoring in systems such as EV battery thermal management loops, pumps, and coolant distribution units used in data center liquid cooling. Pressure measurements can be taken either through a standalone module or by integrating the sensor into a larger system assembly.
Factory Calibration and Electrical Protection
Each sensor is calibrated by Melexis across multiple pressure and temperature points. The devices therefore do not require module-level end-of-line calibration, according to the company.
The low-pressure variants include overvoltage protection up to +40 V and reverse-voltage protection down to -40 V. They are developed as Safety Elements out of Context under ISO 26262 and support integration into systems up to ASIL B. Melexis specifies glycol compatibility for the new variants, reflecting their intended use with coolant media.
Analog, LIN, and SENT Variants
The low-pressure range is available across three Triphibian devices. The MLX90830 provides an analog output, the MLX90833 uses LIN, and the MLX90834 provides a SENT interface.
Digital versions include on-chip temperature information and support connection of an external NTC where pressure and temperature data are both required.
The new low-pressure MLX90830, MLX90833, and MLX90834 variants are available now. Melexis plans to add SPI and I²C options in 2027.
Learn more and read the original announcement at the Melexis website.
Technology Overview
The Melexis low-pressure Triphibian variants are MEMS pressure sensors with configurable spans starting at 2 bar. Their suspended-cantilever sensing element is designed for direct contact with gas, liquid, and frozen media, while signal processing, conditioning, and the output driver are integrated in a factory-calibrated SOIC16 wide-body package. Analog, LIN, and SENT versions are available.
Frequently Asked Questions
What pressure ranges do the new Melexis Triphibian variants support?
The new variants support configurable pressure spans starting at 2 bar, with 2 bar and 4 bar operating ranges extending the wider Triphibian family’s coverage from 2 bar to 70 bar.
Which output interfaces are available?
The MLX90830 provides an analog output, the MLX90833 supports LIN, and the MLX90834 supports SENT. Melexis plans SPI and I²C options for 2027.
Can Triphibian sensors measure liquid coolant directly?
Yes. Melexis designs the Triphibian sensing element for direct contact with gas, liquid, and frozen media. The new low-pressure variants are also specified for compatibility with glycol-based coolants.
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