well-organized structure，great anti-interference capability，small volume and light weight，cost a small amount of power and operate stably. 

1、Measure range： 2000Nt~100000nT  

2、Intensity resolution： 0.1nT  

3、Accuracy： ±1nT (total absolute field intensity= 50000nT)  

4、Allowable gradient： ≤5000nT/m  

5、Environment temperature： -15℃~+50℃ 

6、Environment humidity： ≤95% (25℃)  

7、Data storage Daily variation: no less than 200 days (min. reading interval=5s, 24 h/day)， Stationary measurement: no less than 100,000 spots  

8、Power Lithium ion battery：12.8V~16.8V/5 Ah, continuously operating for no less than 17 hours (when in daily variation mode, typical reading interval is 10s)  

9、Size (L×W×H): 260×100×230 (mm)  

10、Weight： About 2Kg  

11、Size and weight of probe φ74×150 (mm), 0.8Kg