Water sampling equipment, instruments, environmental sampling supplies, hazardous gas detection meters
Water sampling equipment, instruments, environmental sampling supplies, hazardous gas detection meters













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Calibration Supplies & Repair Parts
We stock a variety of calibration solutions and supplies. If you don’t see something that you need, please ask us. We may be able to conveniently provide it to you all in one order.

Water Quality testing instruments require periodic calibration using standardized reference solutions. Some sensors require periodic replacement of electrolyte solution or replacement of a membrane. EON stocks convenient field-size plastic bottles of the most common calibration solutions, electrolytes, and accessories.

Don’t forget batteries! Click here for a complete listing of replacement batteries.



Calibration Solutions and Repair Parts Ordering Information
 CONDUCTIVITY
WQS 110 Cal Solution; Cond 1000 uS/cm 500 ml
WQS 115 Cal Solution; Cond 1000 uS/cm 1 L
WQS 120 Cal Solution; Cond 1413 uS/cm 450 ml
WQS 125 Cal Solution Packets; Cond 1413 uS/cm 25 @ 20 ml
 SPECIFIC ION
WQS 140 Cal Solution; Bromide      10 ppm 1 L
WQS 141 Cal Solution; Bromide     100 ppm 1 L
WQS 142 Cal Solution; Bromide   1000 ppm 1 L
WQS 145 Cal Solution; Chloride      10 ppm 1 L
WQS 146 Cal Solution; Chloride    100 ppm 1 L
WQS 147 Cal Solution; Chloride  1000 ppm 1 L
 pH BUFFERS
WQS 170 Cal Solution; pH 4 Buffer 500 ml
WQS 175 Cal Solution; pH 7 Buffer 500 ml
WQS 177 Cal Solution; pH 7 Buffer 4 L
WQS 180 Cal Solution; pH 10 Buffer 500 ml
WQS 181 Cal Solution Packets; pH 10 Buffer 25 @ 20 ml
WQS 190 Cal Solution Packets; pH 4& 7 5 ea @ 20 ml
 DO & ORP
WQS 150 Cal Solution; DO, Zero O2 460 ml
WQS 160 Cal Solution; ORP 200 to 275mV 230 ml
WQS 151 Cal Solution; Zobell ORP, 241mV YSI 556  125 ml
 TURBIDITY
WQS 200 Cal Solution; Turbidity-EPA    0-FTU (NTU) 30 ml
WQS 201 Cal Solution; Turbidity-EPA  10-FTU (NTU) 30 ml
WQS 202 Cal Solution; Turbidity-EPA 500-FTU (NTU) 30 ml
 MULTIPARAMETER
WQS 250 Cal Solution; Auto Cal, Horiba (pH4,Cond,Turb,DO) 500 ml
WQS 251 Cal Solution: Level Two Horiba (pH7,Turb 40NTU, Cond) 500 ml
WQS 252 Cal Solution: Auto Cal, Horiba (pH4, Cond, Turb, Do) 4L
 ELECTROLYTE & MISC
WQS 506 Electrolyte; O2 for Hanna Meter 30 ml
WQS 510 Electrolyte;  KCL for TempHion 500 g
WQS 511 Electrolyte; for pH, for TempHion 60 ml
WQS 195 Cal Solution; Electrode Storage 460 ml
WQS 196 Cal Solution; Electrode Cleaning 450 ml
Parts & Accessories
WQP 104 Electrode Removal Tool For Hanna Pocket Meters
WQP 130 Membrane Kit, DO for Hanna Meter 5 each
WQP 150 Membrane Kit; DO Memb & Electrolyte for U-22  
WQP 305 Membrane Kit; DO Memb & Elec'lyte for 55
WQP 310 Membrane Kit; DO Screw-On for 550A  
WQP 315 Membrane Kit; DO Screw-On for 556 30 each
WQP 515 Replacement Sensor; DO for Horiba U-22  
WQP 520 Replacement Sensor; DO for YSI 55  
WQP 521 Replacement Sensor; DO for YSI 550A  
WQP 522 Replacement Sensor; DO for YSI 556  
WQP 555 Replacement Sensor; Conductivity for YSI 63  
WQP 570 Replacement pH Sensor for WQM105 & 120  
WQP 575 Replacement Sensor; pH for Horiba U-22  
WQP 580 Replacement Sensor; pH/ORP for Horiba U-22  
WQP 590 Replacement ORP Sensor for WQM115
WQP 800 Carry Case, Soft-Side for YSI instruments

EON Products, Inc.  ·  Toll-Free: (800) 474-2490