MS554C (Digital Barometric Waterproof Pressure Sensor)

This is an amazing digital pressure sensor from Intersema has wide range applications.The MS5540C pressure sensor measures Absolute water or air pressure. It also measure temperature at the same time. So you can use it for measuring water depth in sea or water level in tank. It can be also be used with different fluids measurements such as oil. You might use it also with air  for measuring altitude (barometer) and temperature.

The MS5540C carries a metal protection cap filled with silicone gel for enhanced protection against water and humidity. The properties of this gel ensure function of the sensor even when in direct water contact. The MS5540C is qualified referring to the ISO Standard 2281 and can withstand a pressure of 100 m in salt water. Nevertheless the user should avoid drying of hard materials like for example salt particles on the silicone gel surface. In this case it is better to rinse with clean water afterwards.

The sensor measure water depth  with very good accuracy of 0.1 mbar (1 cm water level). Please read note 3 below for linear range and accuracy. The pressure module have wide range applications ranging from liquid level measurements in tanks, water depth and temperature in diving, snorkeling and ROV.

The pressure sensor is factory calibrated and future electronics Egypt has extensively tested the sensor and prepared a  tutorial (check below) showing how to read factory calibration coefficients and use it to measure both pressure and temperature in an accurate manner.

Features:

1. Low voltage, low power device, and with automatic power off switch.
2. 3 wire interface can meet the various communication with the microprocessor.
3. Compared with MS5534A, the pressure range of the pressure drop (10 mbar) is improved. Relative to MS5540B, MS5534B by the previous 15 bit output to 16 bit digital output. Other improvements include ESD sensitivity, current consumption, and switch accuracy.
4. MS5540C software is compatible with MS5534A, MS5534B, MS5534C, MS5540B. In addition MS5540C is compatible with the MS54xx series from its external dimension to the pressure sensor.
5. Sensor glue can be met in the use of waterproof watches without any other protection against the 100 meter water depth.
6. Application: * portable altimeter / Barometer system * weather control system or watch wild adventure mode * standby current < *GPS 0.1uA receiver

Specification:

1. Absolute pressure range: 10 – 1100 mbar
2. Resolution 0.1 mbar and 0.01
3. Chip memory 6 parameters for software compensation
4. Piezo resistive silicon micro sensor
5. Integrated micro pressure sensor 6.2×6.4 mm
6. 16 bit ADC, SPI interface
7. 3 serial interface
8. 1 system clock (32.768 kHz)
9. Operating voltage 2.2 V -3.6 V
10. Working current:5uA
11. RoHS compatible :Pb-free
12. Operating temperature: -40C – +85C
13. Waterproof, maximum water depth of 100 meters (ISO2281)
14. Board size:18*16mm