There are many types of micro water pumps, here are some common types:

1. **Centrifugal pump**: A centrifugal pump is a type of pump that uses centrifugal force to transfer fluid. It is a simple and reliable pump that is widely used in various fields.

2. **Gear pump**: A gear pump is a type of positive displacement pump that uses gears to transfer fluid. It is a high-pressure pump that is suitable for applications that require high pressure and low flow rate.

3. **Screw pump**: A screw pump is a type of positive displacement pump that uses screws to transfer fluid. It is a low-pressure pump that is suitable for applications that require low pressure and high flow rate.

4. **Diaphragm pump**: A diaphragm pump is a type of positive displacement pump that uses a diaphragm to transfer fluid. It is a leak-proof pump that is suitable for applications that require leak-proof and high purity.

5. **Peristaltic pump**: A peristaltic pump is a type of positive displacement pump that uses a flexible tube to transfer fluid. It is a leak-proof pump that is suitable for applications that require leak-proof and high purity.

 

These are some common types of micro water pumps, and each type has its own characteristics and application scenarios. When choosing a micro water pump, you need to consider the specific application requirements and parameters to select the most suitable pump type.