10m-500m Steel Ruler Water Level Gauge for Groundwater Well Water Level
| specification | 30m | 50m | 100m | 150m | 200m | 300m | 500m |
| measurement dept.(m) | 0-30 | 0-50 | 0-100 | 0-150 | 0-200 | 0-300 | 0-500 |
| minimum reading(mm) | 1 | ||||||
| repetitive reading(mm) | ±2.0 | ||||||
| operating voltage(V) | DC=9 | ||||||
