I、Summary

 To make the TDS conductivity test easy ，we designed a lot of tds sensor。As the most easy test item,  TDS sensor was used in homehold water purifier,commercial water purifier, fish tank,agricuture ,etc. TDS-X10-2 series sensors includes TDS210 for 2/8 inches tube and TDS310-2 for 3/8 inches tube.
 
 
II、Important Param.

	Introduction	Min	Typical	Max	Unit
Electronic param.
Operating Voltage		3.3	5	5.5	v
Operating Current		2		4	mA
resistance when open	when circuit is open, the res. between the two probes	5	50	100	mΩ
resistance when short circuit	when circuit is shorted, the res. between the two probes		2		Ω
Operating param.
measure range	the range when it can works	0		2000	uS/cm2
		0		1000	ppm①
TDS resolution		0.1	1		ppm
Temp. calibration range	the range when temprature calibration work normal	0	25	50	℃
probe life	based on the working condition	1	2	3	Year
pressure range	max pressure for the probe		4	9	Bar
water velocity limit	max water velocity	0	0.5	2	L/min
Storage Temp.	when the package is instant	0		50	℃
Storage Humudity	when the package is instant	0		95	%RH
structure param.
probe length	metal parts ouside	5.9	6	6.1	mm
probe diameter			1		mm
electrode gap			2		mm
probe head length	TDS210		59		mm
	TDS310		69		mm
wire length	standard 500mm, can be customized	480	500	520	mm

 
 notes：
1 for  less than 2000us/cm³  
 
 
 
III、Demension
DS-310-2 stucture in mm


IV、Reference design

Calculate Steps:
1 get the conductivity of liquid on the current temperature
   Conductivity K=Q/R， we get the resistance of the liquid, Q is a constant of the probe.
2 Convert the conductivity to 25℃
  K₂₅=Ktest/（1+（Ttest-25）×2%）
 
3 get the TDS
TDS=K₂₅ x0.5


V、Install instructions