DY4102 Analog Ground Resistance Tester price is available in sensotech website.
Features:
round resistance measurements from 0.01Ω to 2000Ω with 0.01Ω resolution
Low battery warning
Complete with test leads, auxiliary earth bars, heavy duty case and six 1.5V batteries
Specifications:
| Earth Ground Resistance | 0/10/100/1000Ω ±5% | 
| Earth Voltage | 0~30V ±5% | 
| Low Battery Warning | yes |