solution combo meter Dist5 Hanna colorimeter oakton EC Meter
Calibration Standards Hanna Combo
Hanna Dist5
Hanna Multi
Parameter Meter
Oakton EC Tester
35634-55 pc35 pinpoint Pro 30
Oakton Multi
CTSTester 50P
Oakton Multi
Parameter Tester
Pinpoint Conductivity
YSI Pro30 Meter

ec meter

Ideal for a wide variety of applications, these waterproof, dustproof testers provide dual-range measurements with +/-1% full-scale accuracy and push-button calibration (single or one point per range). The Valox® housing and stainless steel electrodes provide excellent chemical compatibility and durability. Because the electrodes are replaceable, the meter body can be reused many times without losing waterproof and dustproof protection. Additional features include a HOLD function, automatic temperature compensation, auto shutoff, and low-battery indicator.

ECTestr 11:
• Range: 0 to 2000 S; 0 to 20.00 mS.
• Resolution: 10 S; 0.10 mS.
• Calibration: 1 pt. push button.
• Accuracy: 1% full-scale (of range).
• Temperature: Operating, 32°F to 122°F (0°C to 50°C).
• Temperature Compensation: Automatic.
• Battery: Power, (4) 1.5V batteries (included).
• Battery: Life, >150 hrs.
• Dimensions: 6.5"L x 1.5" dia.

TDSTestr 11:
• Range: 0 to 2000 ppm; 0 to 10.00 ppt.
• Resolution: 10 ppm; 0.10 ppt.
• Calibration: 1 pt. push button.
• Accuracy: 1% full-scale (of range).
• Temperature: Operating, 32° F to 122°F (0°C to 50°).
• Temperature Compensation: Automatic.
• Battery: Power, (4) 1.5V batteries (included).
• Battery: Life, >150 hrs.
• Dimensions: 6.5"L x 1.5" dia.

#ECTestr11: Oakton Dual Range EC Tester $135.00
#TDSTestr11: Oakton Dual Range TDS Tester $135.00
76432 Replacment Electrode $89.00

35634-55 meter

This CTS tester makes measuring water quality easier and faster. The large display offers a better viewing angle, has indicators for battery life, readiness, and calibration, and shows both the parameter and temperature readings at the same time. To enhance field use, the cap was redesigned to be leakproof and can be attached to the top of the meter when not being used-no more lost caps! The cap features a fill line, so you know how much sample you need for an accurate reading when using the cap as a sample cup. The wider design provides a base to keep the meter upright for hands-free measurements. The keypad features fourth key to simplify menu navigation while keeping convenient one-touch calibration. The housing is compatible with lanyards to prevent losing or dropping, but is still waterproof.

- Immerse and read with pin-style sensor
- Redesigned leakproof cap functions as a sample cup and stabilizing base to stand the meter upright
- Automatic temperature compensation ensures accurate reading in varying environments
- Easy-to-navigate interface for quick setup and calibration

Range: Conductivity: 0.0 to 200.0 S, 200 to 2000 S, 2.00 to 20.00 mS; TDS: 0.0 to 100.0 ppm, 100 to 1000 ppm, 0.10 to 10.00 ppt (TDS factor 0.5); Salinity: 0.00 to 10.00 ppt
Resolution: Conductivity: 0.1 S, 1 S; 0.01 mS TDS: 0.1 ppm, 1 ppm; 0.01 ppt Salinity: 0.10 ppt
Accuracy: Conductivity: 1% full-scale TDS: 1% full-scale Salinity: 1% full-scale
Temperature Range: 32° to 140°F (0° to 60°C)
Temperature Resolution: 0.1
Temperature Accuracy: 0.9°F (0.5°C) from 32° to 122°F (0° to 50°C); 1.8°F (1.0°C) from 122° to 140°F (50° to 60°C)
Calibration: Up to 3 points (conductivity and TDS); 1 point (salinity)
ATC: Yes
Operating Modes: conductivity, TDS, and salinity
Power Supply: AAA Batteries
Includes: Protective plastic storage case, lanyard, and 4 AAA batteries

#CTS50P: Oakton Waterproof Multi-Parameter CTSTestr 50P $205.00
#R-CTS50P: Replacement conductivity sensor for Oakton Waterproof CTSTestr 50P $69.00

dist5 meter

• EC range of 0 to 3999 uS/cm at a 1 uS/cm resolution within an accuracy (@ 20°C/68°F) of +/-2% Full Scale
• TDS range of 0 to 2000 ppm at a 1 ppm resolution within an accuracy (@ 20°C/68°F) +/-2% of Full Scale
• Temperature range of 0.0 to 60.0 °C or 32.0 to 140.0 °F at 0.1 °C or 0.1 °F resolution within an accuracy (@ 20C/68°F) +/-0.5 °C or +/-1 °F
• EC / TDS Calibration; Automatic 1 point at 1413 uS/cm
• Includes 4 x 1.5V batteries with 100 hours rated life
• Auto Shut-off after 8 minutes
• Battery Operated: 4 x 1.5V / 100 Hours

This waterproof tester has a dual-level LCD that displays EC or TDS and °C or °F. At startup, DiST performs a self check and then displays the remaining battery level to assure proper working condition. It also features a stability indicator and hold feature to prompt the user when to take the reading. The stainless steel temperature probe makes for faster and more precise temperature measurement. Calibration and temperature compensation is automatic. The graphite electrode provides the greatest possible accuracy as it cannot be contaminated by salt deposits in the solution!

Specification Data Sheet for Hanna DiST5 Meter

Manufacturer Flyer for Hanna DiST5 Meter

#HI98311: Hanna DiST5 Meter $148.00
#HI73311: DiST5 Replacement Electrode $83.00

combo meter

The new waterproof HI98129 & HI98130 Combo testers from Hanna are designed for high accuracy pH, EC/TDS and temperature measurements. No more switching meters to measure the pH and then the EC or TDS of a solution. At startup, Combo performs a self check then displays the remaining battery level to assure proper working condition. These testers also have a stability indicator and hold feature to prompt the user when to take the reading & freeze the display for easy and accurate recording. Calibration and temperature compensation is automatic, while the EC / TDS conversion factor and temperature coefficient factor () are user adjustable for application specific measurements. For calibration in pH, the user may choose between standard or N.I.S.T. buffer sets. The combo has a replaceable pH electrode cartridge with an extendable cloth junction as well as an EC/TDS graphite electrode, which resists contamination by salts and other substances that come in contact with the electrode. These new pH / EC / TDS / Temperature meters have a stainless steel temperature probe for faster and more precise temperature measurement. Fast, efficient, accurate and portable, the Combo pH, EC/TDS and temperature tester meets the requirements of your routine multi-measurements.

Choose your Combo according to the proper EC / TDS ranges for your application:

HI98129 Combo; EC - 0 to 3999 uS/cm; TDS - 0 to 2000 ppm with HI73127 pH electrode, 4 x 1.5V batteries and electrode replacement tool (HI73128).

HI98130 Combo; EC 0.00 to 20.00 mS/cm; 0.00 to 10.00 ppt with HI73127 pH electrode, 4 x 1.5V batteries and electrode replacement tool (HI73128).

Specification Data Sheet for HI98129 and HI98130

Manufacturer Flyer for HI98129 and HI98130

Note that calibration, storage and cleaning solutions are not included with the meter. Storage solution will be required to soak the meter prior to the first usage.

HI98129 HI98130
Range: EC 0 to 3999 uS/cm 0.00 to 20.00 mS/cm
Range: TDS 0 to 2000 ppm 0.00 to 10.00 ppt
Range: pH 0.00 to 14.00 pH
Range: Temperature 0.0 to 60.0 °C or 32.0 to 140.0 °F
Resolution: EC 1 uS/cm 0.01 mS/cm
Resolution: TDS 1 ppm 0.01 ppt
Resolution: pH 0.01
Resolution: Temperature 0.1 °C or 0.1 °F
Accuracy: EC/TDS 2% of Full Scale
Accuracy: pH 0.05
Accuracy: Temperature 0.5 °C or 1°F
Calibration: EC/TDS Automatic @ 1 point
Calibration: pH 1 or 2 points with 2 sets of memorized buffers: (pH 4.01, 7.01 & 10.01 or 4.01, 8.68 & 9.18)
Temperature Compensation: EC/TDS BETA () = adjustable from 0.0 to 2.4 per °C in increments of 0.1
Temperature Compensation: pH Automatic
EC / TDS Conversion Factor Adjustable from 0.45 to 1.00
Environment 0 to 50°C (32 to 122°F); R.H. 100%
Battery Type / Life 4 x 1.5V / 100 hours
Auto Shut-off After 8 minutes
Dimensions 163 x 40 x 26 mm (6.4 x 1.6 x 1.0″)
Weight 85 g (3 oz.)

#HI98129: HI 98129 Combo; EC - 0 to 3999 uS/cm; TDS - 0 to 2000 ppm $210.00
#HI98130: HI 98130 Combo; EC 0.00 to 20.00 mS/cm; 0.00 to 10.00 ppt $210.00
#HI73127: Replacement pH Electrode $83.00
#HI73128: pH Probe Replacement Tool $19.00

pc35 meter

Ideal for water, wastewater, laboratory, or plant use, this multi-parameter Testr featurea long-life pH electrodes with a wide range of sample compatibility. The Tester features up to five-point pH calibration with NIST or USA autobuffer recognition. The Conductivity parameter features autoranging based on the concentration of your sample. Pin-style conductivity sensors have stainless steel electrodes for outstanding chemical resistance and durability. Replaceable sensors allow you to reuse the meter body without compromising the waterproof and dustproof protection. Other advanced features include push-button calibration, HOLD function, auto-shutoff, user-adjustable temperature coefficient, and low-battery indicator. Case, batteries, and lanyard included.

PCTestr™ 35 - Measures conductivity, pH, and temperature
Range: pH, 0.0 to 14.0; Conductivity, 0 to 1999 S, 2.00 to 20.00 mS; Temperature, 32°F to 122°F (0°C to 50°C).
Resolution: pH, 0.1; Conductivity, 1 S, 0.01 mS; Temperature, 0.1°F (0.1°C).
Accuracy: pH, 0.1; Conductivity, 1% full scale; Temperature: 0.9°F (0.5°C).
Calibration: pH, Up to 5 points (auto-recognition); Conductivity, 2 auto, 2 manual; Temperature compensation, Automatic and manual.
Conductivity temperature coefficient, 0.0 to 100%/°C.
Junction: Single.
Display: LCD.
Power: 4 x 1.5 V A76 button cell (included).
Battery life: >150 hours.
Low battery indicator: Yes.
Operating temperature: 32°F to 122°F (0°C to 50°C).
Dimensions: 6-1/2" L x 1-1/2" diameter

#PCTestr35: Okaton Multi-Parameter Testr $215.00
#76532: Replacement Sensor for PCTestr35 $125.00
#PC35-ORING: Replacement O-Ring Set Currently Unavailable

pinpoint meter

This pocket size meter measures from 0-2000 S or 0-20,000 uS. Temperature compensated. One meter of cable. Runs on 9V battery (included). Accurate to 2% of reading. Weight 22 grams. 0.4 seconds sampling time.

#CM6: Pinpoint Conductivity Meter $175.00
#PA12: Optional AC Adapter $17.75

ysi Pro30

The YSI Pro30 field conductivity meter simultaneously measures conductivity, specific conductance, salinity, total dissolved solids (TDS) and temperature. User-replaceable cables and convenient Quick Cal features make it extremely user-friendly. The instrument also features Mil-spec (military spec) quarter-turn locking connectors, an IP-67 waterproof rating with a rubber over molded case, and 1-meter drop test rating.

The super-stable 4-electrode conductivity cell is built directly into the cable bulkhead providing years of accurate data. The conductivity cells are designed for rugged field performance and are easily cleaned with a small conductivity brush.

Other features include:
• Quick Cal routine allows calibrations with the push of a button; remembers previous calibration values and walk user through the routine
• Stores 50 data sets
• Graphic, backlit display and glow in the dark keypad
• Available with 1, 4, 10, 20, or 30-meter cables (4-meter and longer cables include cable management kit)
• View display with polarized sunglasses on
• Multiple languages include English, Spanish, French and German
• User-replaceable cables utilizing a robust MS connector that locks in place with a quarter turn rotation
• Conductivity cell is part of the cable bulkhead and is a proven, field-worthy electrode
• 3-year instrument; 2-year cable warranty

Order instrument and cables separately below.

YSI-PRO30: YSI PRO30 Meter Body $770.00
YSIPRO-30-4: YSI Pro Series Conductivity Cable, 4m $448.00
YSIPRO-30-10: YSI Pro Series Conductivity Cable, 10m $525.00
YSIPRO-30-20: YSI Pro Series Conductivity Cable, 20m $588.00


Used to standardize conductivity and TDS meters.

#6417-L: 718 uS/cm Standard, 500 ml $26.75


Used to standardize conductivity and TDS meters.

#HI7033L: 84 uS/cm Standard, 500 ml $21.00
#HI7031M: 1413 uS/cm Standard, 250 ml $15.00
#HI7031L: 1413 uS/cm Standard, 500 ml $21.00
#HI7031GL: 1413 uS/cm Standard, 4000 ml $99.00
#HI7030L: 12880 uS/cm Standard, 500 ml $21.00


Standards have KCl, NaCl and 442 conversions printed on the bottle for ease of use. Temperature corrections are printed on the bottle, with the certified values listed in the tables, and are referenced to 25C. One 500-mL (17-oz) bottle.

#C10740: 84 uS/cm Standard, 1 Pint $19.00
#C10741: 1413 uS/cm Standard, 1 Pint $19.00
#C10742: 12880 uS/cm Standard, 1 Pint $19.00


For compatible YSI® Conductivity, Salinity & Temperature Meters
NIST-traceable conductivity solutions to calibrate both field instruments and lab instruments and cells together for maximum accuracy. 1 pint bottles.

#3167-E: 1,000 uS/cm, Pint (Fresh water) $29.95
#3168-E: 10,000 uS/cm, Pint (Brackish water) $29.95
#3169-E: 50,000 uS/cm, Pint (Salt water) $29.95


Conductivity calibration solutions supplied in handy and cost effective 20 ml sachets. Each pouch contains sufficient solution for one calibration. The calibration solutions are individually sealed inside each sachet and protected against the ingress of light and air. Hence when you calibrate your meter in a pouch, it is like adjusting your meter in a freshly opened calibration solution. Available individually or in packages of 25.

#HI70031P: 1413 uS/cm Pouch, 20 ml $1.98
#HI70031P25: 1413 uS/cm Pouch, 20 ml, Box of 25 $42.00