From Makers Electronics's description

BMP180 GY-68 Barometric Pressure Sensor This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter! The sensor is soldered onto a PCB with a 3.3V regulator, I2C level shifter and pull-up resistors on the I2C pins. Measuring the absolute pressure of the environment using a digital barometer such as this has some interesting applications. By converting the pressure measured into altitude, you have a reliable sensor for determining the height of your robot, plane or projectile. Features: Can measure temperature and altitude. Pressure range: 300 to 1100hPa. High relative accuracy of ±0.12hPa. Can work on low voltages. 3.4Mhz I2C interface. Low power consumption (3uA). Pressure conversion time 5msec. Potable size. Specifications: Pressure range: 300 ~ 1100 hPa (altitude 9000 m ~ – 500 m) Compatible with 3.3V and 5V LCC8 encapsulation: lead-free ceramics carrier encapsulation (LCC) Low power consumption: 5 μA, in the standard model High precision: low power consumption mode, the resolution is 0.06 hPa (0.5 meters); High linear mode, the resolution is 0.03 hPa (0.25 meters) MSL 1 response time: 7.5 ms Standby current: 0.1 μA Size: 15mm * 13mm Pin Configuration: Pin Description VIN(VCC) Power supply (typically 3.3V; some modules support 5V) GND Ground SCL I2C clock line (connect to microcontroller SCL pin) SDA I2C data line (connect to microcontroller SDA pin) Applications: Weather forecast. Smartwatches. Mobile phones. GPS navigation. Vertical velocity indication. Package Includes: 1 x BMP180 Barometric Pressure Sensor. 1× 4-pin header strip. Data sheet: BMP180

From Ampere Electronics's description

GY-68 BMP180 Atmospheric Pressure Module BMP180 is one of sensor of BMP XXX series. They are all designed to measure Barometric Pressure or Atmospheric pressure . BMP180 is a high precision sensor designed for consumer applications. Barometric Pressure is nothing but weight of air applied on everything. The air has weight and wherever there is air its pressure is felt. BMP180 sensor senses that pressure and provides that information in digital output. Also the temperature affects the pressure and so we need temperature compensated pressure reading. To compensate, the BM180 also has good temperature sensor. Pin Configuration: Pin Name Description VCC Connected to +5V GND Connected to ground. SDA Serial Data pin (I2C interface) SCL Serial Clock pin (I2C interface) 3.3V If +5V is not present. Can power module by connecting +3.3V to this pin. Features: Can measure temperature and altitude. Pressure range: 300 to 1100hPa High relative accuracy of ±0.12hPa Can work on low voltages 3.4Mhz I2C interface Low power consumption (3uA) Pressure conversion time: 5msec Potable size Specifications: Operating voltage of BMP180: 1.3V – 3.6V Input voltage of BMP180MODULE: 3.3V to 5.5V Peak current : 1000uA Consumes 0.1uA standby Maximum voltage at SDA , SCL : VCC + 0.3V Operating temperature: -40ºC to +80ºC Applications: Indoor navigation Sport devices Computer Peripherals GPS Weather forecast Vertical velocity Indication Hobby projects 2D-Model: Package Includes: 1x GY-68 Pressure Module Documents: Instructions Datasheet Related Products: SENSORS | MODULES

From Micro Ohm's description

Introduction The BMP180 sensor module is a high-precision, low-power barometric pressure and temperature sensor based on Bosch’s BMP180 IC. It communicates via I²C or SPI and is widely used in weather monitoring, altitude measurement, and environmental sensing projects. Its compact size and low cost make it an excellent choice for hobbyists, IoT developers, and embedded systems. Key Features Measures barometric pressure and temperature. Digital output via I²C interface (3.3V logic). High accuracy: ±1 hPa pressure, ±2 °C temperature. Low power consumption. Wide operating voltage range. Small and lightweight breakout module. Technical Specifications Sensor IC: BMP180. Pressure Range: 300 – 1100 hPa. Pressure Accuracy: ±1 hPa. Temperature Range: –40 °C to +85 °C. Temperature Accuracy: ±2 °C. Supply Voltage: 1.8 – 3.6 V (typ. 3.3 V). Interface: I²C (up to 3.4 MHz). Operating Current: ~5 µA (standby), ~12 µA (active). Dimensions: approx. 21 × 15 × 1.5 mm. Applications Weather stations and climate monitoring. Altimeters for drones and GPS systems. Portable devices requiring atmospheric data. Indoor navigation systems. IoT environmental monitoring projects. المقدمة تُعد وحدة BMP180 مستشعر ضغط جوي ودرجة حرارة عالي الدقة ومنخفض الاستهلاك للطاقة، مبني على شريحة Bosch BMP180. يتواصل عبر بروتوكول I²C (أو SPI في بعض الإصدارات)، ويُستخدم على نطاق واسع في محطات الطقس، قياس الارتفاع، ومشاريع الاستشعار البيئي. صغر حجمه وتكلفته المنخفضة يجعلاه خيارًا مثاليًا للهواة ومطوري إنترنت الأشياء والأنظمة المدمجة. الميزات الرئيسية يقيس الضغط الجوي ودرجة الحرارة. خرج رقمي عبر واجهة I²C (بمنطق 3.3 فولت). دقة عالية: ±1 hPa للضغط، ±2 °م للحرارة. استهلاك منخفض للطاقة. يعمل على مدى واسع من الفولتية. وحدة صغيرة الحجم وخفيفة الوزن. المواصفات الفنية الشريحة: BMP180. مدى الضغط: 300 – 1100 hPa. دقة الضغط: ±1 hPa. مدى الحرارة: –40 °م إلى +85 °م. دقة الحرارة: ±2 °م. جهد التغذية: 1.8 – 3.6 فولت (قياسي 3.3 فولت). الواجهة: I²C (حتى 3.4 ميجاهرتز). التيار: ~5 ميكروأمبير (وضع الاستعداد)، ~12 ميكروأمبير (نشط). الأبعاد: تقريبًا 21 × 15 × 1.5 مم. التطبيقات محطات الطقس ورصد المناخ. مقاييس الارتفاع للطائرات بدون طيار وأنظمة GPS. الأجهزة المحمولة التي تحتاج بيانات جوية. أنظمة الملاحة الداخلية. مشاريع إنترنت الأشياء لرصد البيئة.

From Most Electronic's description

This pressure sensor module is used for measuring barometric pressure (weather) and altitude. It also have temperature sensor for temperature compensation of pressure measurements. It uses push sensor the BMP180. It offers a pressure measuring range of 300 to 1100 hPa with relative pressure error to 0.12 hPa (1m height). Note : (1 hPa ≡ 100 Pa) which is equal to 0.001 bar (atmospheric) BMP 180 is a barometric pressure sensor with an I2C (“Wire”) interface. Barometric pressure sensors measure the absolute pressure of the air around them. This pressure varies with both the weather and altitude. Depending on how you interpret the data, you can monitor changes in the weather, measure altitude, or any other tasks that require an accurate pressure reading. Features Digital two wire (I²C, TWI, “Wire”) interface Wide barometric pressure range Supply Voltage: 3.3 V Ultra-low power consumption Low noise measurements Factory-calibrated Includes temperature sensor Pin Definition: Vin= Input voltage (3.3 v) GND= ground DA (SDA): I2C data CL (SCL): I2C clock For BMP180 datasheet, click here