|  						 Sensors  						 |  						 						Various principle sensors can be combined in any number , up to 18 sensors; Combustible: catalytic combustion principle orinfrared principle; 						 oxygen: electrochemical principle or zirconia principle;   						toxic: electrochemical principle;   						CO2: infraredprinciple;   						VOC: PID photo ion principle;   						CH4: catalytic combustion principle or infrared principle;   						He: thermal conductivity Principle,   						temperature and humidity sensors, pressure sensors (optional) (other principles of the sensor can be customized)  						  						 |  					  					 						|  						 Measure range  						 |  						 						 0~1,10,100,1000,5000,50000,100000 PPM;0-100mg/L,200mg/L;  						0-100%LEL;0-10%,20%,50%,99.999%,100%Vol(Measure range is optional and customerized)  						 |  					  					 						|  						 Resolution  						 |  						 						 0.001 PPM(0-1 PPM);0.01 PPM or 0.001 PPM(0~10 PPM);  						0.1 PPM or 0.01 PPM(0~100 PPM);1 PPM or 0.1 PPM(0~1000 PPM);  						1 PPM(0~1000 PPM);0.01mg/L(0~200%mg/L);0.1%LEL(0-100%LEL);0.01%(0-100%VOL)  						 |  					  					 						|  						   						Display  						 |  						 						 Formula, gas concentration data, measurement trend curve, gas curve, battery, time, temperature, humidity, pressure (optional),  						pump condition, wireless status, printer status, screen shot status  						 |  					  					 						|  						 Alarm  						 |  						 						 Buzzer, red LED and alarm status on the display, fault alarm, pump abnormal alarm, low battery alarm  						 |  					  					 						|  						 Data storage  						 |  						 						 Independent SD memory card, Max.32G, measurement data can be record automatically, customizable record time interval.  						 |  					  					 						|  						 Data transmission and download  						 |  						 						 RS232,RS485 singnal output, USB interface data transmission, with the upper computer software, can download storage, analyze and  						print data  						 |  					  					 						|  						 Print function(Optional)  						 |  						 						 Optional with internal portable printer or external bluetooth printer  						 |  					  					 						|  						 Print content(Optional)  						 |  						 						 Text, graphics, one-dimensional code, two-dimensional code, curves, characters, etc.  						 |  					  					 						|  						   						Charger  						 |  						 						 Standard Mini-USB charging port. With 13V/2A special charger (built-in printer) or 5V/2A universal charger (external printer )  						 |  					  					 						|  						 Language  						 |  						 						 Chinese/English  						 |  					  					 						|  						 Wireless network (optional)  						 |  						 						 Bluetooth, Zigbee  						 |  					  					 						|  						 Network frequency  						 |  						 						 2.4G high frequency.  						 |  					  					 						|  						 wireless transmission distance  						 |  						 						 Bluetooth is less than 10m, and the ZigBee outdoor single point is less than 500m.  						 |  					  				 			  			 |