JJY-2 Well diameter measuring instrument (small aperture)Detailed product description：

1、 Purpose:
JJY-2 caliper (small aperture) is a specialized equipment for drilling aperture detection, suitable for the inspection and supervision of drilling quality in geological drilling, engineering drilling, and other fields.
This instrument is a caliper point measuring instrument.

2、 Technical specifications of JJY-2 caliper (small aperture)
1. Aperture detection range: Φ 60mm to Φ 430mm.
2. Aperture measurement error: ± 20 mm.
3. Reading display: Three and a half digit LCD digital display.
4. Working power supply: AC220V ± 10%, 50Hz.