| GENERAL FEATURES & SPECIFICATIONS | Ò»°ã¹¦ÄܺÍÒŽ(gu¨©)¸ñ | 
|  | AR-841 | AR-851 | 
| Measuring Range | 0.5¡«15m | 0.5¡«15m(single Unit) | 
| œyÁ¿·¶‡ú | 1¡«60m(Double Unit) | 
| Accuracy | ¡À0.5% | ¡À1.5%(single Unit) | 
| œyÁ¿¾«´_¶È | ¡À2%(Double Unit) | 
| Measure In Imperial/Metric | ¡Ì | ¡Ì | 
| ¹«Ó¢ÖÆÞD(zhu¨£n)“Q | 
| Operation Condition | 0¡«30¡æ | 0¡«30¡æ | 
| ¹¤×÷h(hu¨¢n)¾³ | 30-70%RH | 30-70%RH | 
| Laser Pointer Aiming Selection | ¡Ì | ¡Ì | 
| ¼¤¹â¶¨Î» | 
| Low Battery Indication | ¡Ì | ¡Ì | 
| µÍëŠï@ʾ¹¦ÄÜ | 
| Computer Area And Volume | ¡Ì | ¡Ì | 
| Ó‹(j¨¬)ËãÃæ·eºÍów·e | 
| Sum Of Length | ¡Ì | ¡Ì | 
| Ó‹(j¨¬)ËãéL¶ÈÀÛ¼Ó | 
| Auto/Manual Shut-off | ¡Ì | ¡Ì | 
| ×Ô„Ó(d¨°ng)/ÊÖ„Ó(d¨°ng)êP(gu¨¡n)™C(j¨©) | 
| LCD Backlight | ¡Ì | ¡Ì | 
| LCD ±³¹âï@ʾ | 
| response Time | 2s | 2s | 
| í‘‘ª(y¨©ng)•r(sh¨ª)ég | 
| Measureing Benchmark Setup | ¡Ì | ¡Ì | 
| œyÁ¿»ùœÊ(zh¨³n)ÔO(sh¨¨)Öà | 
| Single Or Double Unit Measure Selection | _____ | ¡Ì | 
| †Î™C(j¨©)ºÍëp™C(j¨©)œyÔ‡ßx“ñé_êP(gu¨¡n) | 
| WorkFrequency | 40khz | 40khz(single Unit) | 
| ¹¤×÷îlÂÊ | 20khz(Double Unit) | 
| Key Sound,Beeps For Wrong Reading | ¡Ì | ¡Ì | 
| And Reading Confirmation | 
| °´æI•Ìáʾ,³öåe(cu¨°)•ÒôÌáʾ | 
| ÒÔ¼°´_ÕJ(r¨¨n)•ÒôÌáʾ |