Wireless back-fat meter is a kind of ultrasonic ranging method to measure the thickness of sow's back-fat at P2 point, and transmit the tested data to cell phone via Bluetooth.

In order to facilitate the statistics of pig farms, we plot the data of different time periods into a curve, which is convenient to understand the fat thickness of sows in different time periods.

P2 point back-fat is a basic data commonly used in the international pig industry, which refers to the thickness of back-fat at the last rib of the pig at 6.5 cm from the midline of the back. The change of P2 back-fat thickness determines the growth level of sows throughout their lives. The reproductive performance of sows can be effectively improved by grasping the P2 back-fat level at each stage.

Apply an amount of gel to the test site, as ultrasound cannot penetrate air or air bubbles. Place the probe against the animal's skin and gently rotate it to ensure that there are no air or bubbles between the skin and the probe. Note that the probe must be kept perpendicular to the back, as tilting it may result in erroneous measurements.

Due to the different measuring positions and the deformation of the fat after slaughter, the fat thickness of a live animal obtained by the back-fat tester is usually a little different from the real data.

Note: Irregularities in the back-fat may affect the penetration of the ultrasound waves. Move the probe to allow the ultrasound to pass through and the reading will be displayed. The thickness of the back-fat layer is not the same everywhere, usually two or three layers in close proximity to each other will ensure accuracy. Older pigs with thicker skin and more dead skin are more difficult to access with the probe. If necessary, you can shave off the hair at the measurement site, moisten the skin with hot water to soften it, apply oil or water and wait 1-2 minutes before measuring.