The Pentax AL Series Automatic Level product leaflet details specifications, features, and accessories for models AL‑240, AL‑270 and AL‑320 series.
The Pentax AL Series Automatic Levels are high‑performance surveying instruments built for harsh conditions. They are IPX6 waterproof, have a gas‑filled objective lens compartment to prevent condensation, and feature a wire‑suspended, magnetically damped automatic compensator.
The series includes the AL‑240, AL‑240R, AL‑270, AL‑270R, AL‑320, AL‑320R and AL‑320S models, offering various magnifications, objective apertures and focus distances. Optional accessories such as a parallel micrometer (SM4), diagonal eyepieces (SBL2) and illumination device (EP2) expand their usability in confined spaces and low‑light environments.
| Sensitivity of vial | Circular vial 8’/2 mm |
|---|---|
| Horizontal circle diameter | 96 mm (metal) / 88 mm (glass) |
| Graduation | 1°/1G (360° or 400G) |
| Estimation accuracy | 0.1°/0.1G |
| Levelling base | 3 screws, spherical |
| Length | 219 mm – 247 mm (model dependent) |
| Magnification | 24× / 27× / 32× |
| Objective aperture | 36 mm / 40 mm / 45 mm |
| Resolving power | 3.5" / 3" / 2.5" |
| Field of view | 2.5 % (1°26’) / 2.3 % (1°20’) |
| Minimum focus distance | 0.3 m (12 in) |
| Automatic compensator range | ±12 ′ |
| Setting accuracy | ±0.5 ″ |
| Standard deviation (1 km double run) | ±2.0 mm |
The instrument is waterproof with protection class IPX6.
The AL‑240 provides a minimum focus distance of 0.3 m (12 in).
It is wire‑suspended and magnetically damped.