Laboratory instruments
See additionally the Laboratory equipment section.
This range includes:
- pH/ORP Meters
- Conductivity/TDS
- Salinity Meters
- Chlorine/Fluoride
- Meters
- Dissolved Oxygen Meters
- Particle Counters
- Leakage Detectors
- Microscopes and Scales
- Stopwatches
- Refractometers
email aqua@ecotao.co.za for prices
Accessories
Extech 804010A: Polymer Conductivity Cell Probe
Conductivity cell probe with 39″ (1m) cable
Features:
- Compatible with 341350A-P – Oyster pH/Conductivity/TDS/ORP/Salinity meter
Extech PH305: pH/mV/Temperature Electrode
Replacement pH/mV/Temperature Electrode
Features:
- Compatible with DO700 – 9-in-1 Portable Dissolved Oxygen Meter
- Compatible with PH300 – 3-in-1 Portable pH/mV/Temperature Meter
Extech DO605: ExStik® Replacement Dissolved Oxygen Module
Replacement dissolved oxygen sensor for ExStik® DO meter
Features:
- Screw-on membrane cap for easy replacement
- Measures Dissolved Oxygen and Temperature
- Non-interchangeable with ExStik® pH, Chlorine or ORP Meter
- ATC via built-in Pt-100Ohm sensor
Chlorine/Flouride Meters
Extech CL200: ExStik® Chlorine Meter
Direct reading of Total Chlorine down to 0.01ppm
Features:
- Direct reading of Total Chlorine provides fast and easy measurements (less than 2 minutes)
- Low detection limit down to 0.01ppm
- Unaffected by sample color or turbidity
- Memory stores, tags and recalls up to 15 readings
- US EPA approved as an acceptable method for wastewater compliance monitoring of Total Chlorine.
Extech FL704: TISAB Fluoride Reagent Tablets
Reagent tablets for use with ExStik® Fluoride Meter
Features:
- Includes 100 tablets
- No messy powder reagents
- No dosing equipment required
- Comes in convenient plastic cup with cap
Conductivity/TDS/Salinity Meters
Extech EC400: ExStik® Conductivity/TDS/Salinity Meter
4-in-1 multi-range sensor for measuring Conductivity, TDS, Salinity and Temperature
Features:
- Autoranging meter offers 3 ranges of measurements from tap water to wastewater and any aqueous solution
- Units of measure include µS/cm, mS/cm, ppm, ppt, mg/L, and g/L
- Adjustable Conductivity to TDS ratio factor from 0.4 to 1.0 – conveniently calculates the TDS value
- Large 3-1/2 digit (2000 count) Digital display with analog bargraph to indicate sample trends
- Data Hold, Auto Power Off and low battery indication
- Automatic Temperature Compensation of 2% per °C
- Simultaneous display of Conductivity, TDS, or Salinity plus Temperature
- Internal memory stores up to 25 labeled readings for easy recall
- Self calibration of electronics on power up
- Order Conductivity standards separately
- Complete with meter and Conductivity cell, protective cap, sample cup, four CR2032 batteries, and 48″(1.2m) neckstrap
Extech EC410: EC410 – ExStik® Conductivity/TDS/Salinity Kit
Waterproof meter with high accuracy multi-range sensor that measures four parameters
Features:
- Includes EC400 meter with sensor, 3 calibration standards, weighted base, 3 plastic cups, batteries and carrying case
- Autoranging meter offers 3 ranges of measurements from tap water to wastewater and any aqueous solution
- Units of measure include µS/cm, mS/cm, ppm, ppt, mg/L, and g/L
- Adjustable Conductivity to TDS ratio factor from 0.4 to 1.0 – conveniently calculates the TDS value
- Large 3-1/2 digit (2000 count) Digital display with analog bargraph to indicate sample trends
- Data Hold, Auto Power Off and low battery indication
- Automatic Temperature Compensation of 2% per °C
- Simultaneous display of Conductivity, TDS, or Salinity plus Temperature
- Internal memory stores up to 25 labeled readings for easy recall
- Self calibration of electronics on power up
Dissolved Oxygen Meters
Extech DO600-K: Waterproof ExStik® II Dissolved Oxygen Meter Kit
Kit with DO600, replacement membrane kit, and 16ft (5m) extension cable with probe guard
Features:
- Kit includes DO600 meter, DO603 membrane kit, 16ft (5m) extension cable, weighted probe guard and carrying case
- Oxygen level displayed as % Saturation or Concentration (mg/L [ppm])
- Adjustable Altitude Compensation (0-20,000ft in 1,000ft increments)
- Adjustable Salinity Compensation from 0 to 50ppt
- Analog bargraph indicates trends
- Memory stores up to 25 data sets with DO and Temperature reading
- Self calibration on power up
- Data Hold, Auto power off, Low battery indicator
Extech DO600: Waterproof ExStik® II Dissolved Oxygen Meter
DO sensor with easy to replace screw-on membrane cap with optional extension cables
Features:
- Oxygen level displayed as % Saturation or Concentration (mg/L [ppm])
- Adjustable Altitude Compensation (0-20,000ft in 1,000ft increments)
- Adjustable Salinity Compensation from 0 to 50ppt
- Analog bargraph indicates trrends
- Memory stores up to 25 data sets with DO and Temperature reading
- Self calibration on power up
- Data Hold, Auto power off, Low battery indicator
Extech DO610: ExStik® II DO/pH/Conductivity Kit
Measures Dissolved Oxygen, pH, Conductivity, TDS, Salinity and Temperature
Features:
- Includes EC500 pH/Conductivity meter with combination high accuracy multi-ranging Conductivity sensor for Conductivity, TDS, Salinity, pH and
Temperature measurements - Includes DO600 Dissolved Oxygen meter with electrode, replacement membrane cap, electrolyte, and polishing paper
- Complete with 3 calibration standards, 3 pH buffer pouches plus rinse solution, 3 plastic cups, batteries and carrying case
Leakage Detectors
Extech RD300: Refrigerant Leakage Detector
Detect Leakages from Air-Conditioning Units and Cooling Systems
Features:
- Detects all standard refrigerants using a heated diode sensor
- LED light at probe tip (with on/off switch) for working in dimly lit areas
- LEDs display user-selectable High/Medium/Low levels with sensitivity of 0.25/0.50/0.99 oz per year
- Audible and Visual alert with mute button
- Low battery indicator
- Field replaceable sensor and LED light tip
- Complete with leak test bottle, 9V battery, and protective hard carrying case
Particle Counter
Extech VPC300: Video Particle Counter with built-in Camera
Measure up to 6 Channels of Particle Sizes plus Air Temperature and Relative Humidity
Features:
- Simultaneously measure and display 6 channels of particle sizes (down to 0.3 µm), Air Temperature, Humidity, Dew Point and Wet Bulb
2.8″ TFT Color LCD display - Built-in 320×240-pixel camera takes videos (3GP) and photo images (JPEG) and records them in internal 74MB memory
- Store 5000 records (date, time, counts, humidity, temperature, sample volumes, and location label) and 20 minutes of video
- Selectable sample time, count data, and programmable delay
- Max, Min, DIF, AVG record, Date/time setup controls, Auto Power Off
- Mini-USB port connection
- Complete with NIST-traceable calibration certificate, Universal AC
Adapter/Charger with multiple plugs, USB cable, PC software, tripod, filter, 7.4V NiMH battery and hard case
pH/ORP Meters
Extech EC510: Waterproof ExStik® II pH/Conductivity Meter Kit
Combination flat surface pH electrode with autoranging high accuracy Conductivity cell
Features:
- Kit includes: EC500 meter, 3 calibration standards, 3 pH buffer pouches plus rinse solution, 3 cups, batteries and carrying case
- Measures 5 parameters including Conductivity, TDS, Salinity, pH, and Temperature using one electrode
- 9 units of measure: pH, µS/cm, mS/cm, ppm, ppt, mg/L, g/L, °C, °F
- Analog bargraph indicates trends
- Memory stores up to 25 labeled readings
- Adjustable Conductivity to TDS ratio from 0.4 to 1.0; 0.5 fixed Salinity ratio
- RENEW feature alerts user when electrode needs replacement
Extech EX900: ExStik® 4-in-1 Chlorine, pH, ORP and Temperature Kit
Chlorine, pH, ORP and Temperature measurements with all the necessary accessories
Features:
- Includes CL200 meter, pH and ORP electrodes, reagent tablets, 4 plastic cups, weighted stand, pH buffer pouches, batteries and carrying case
- 4-in-1 Water Quality Meter measures Chlorine, pH, ORP plus Temperature with interchangeable flat surface electrodes (included)
- Flat surface electrodes work in liquids, semi-solids and solids
- Memory stores and recalls 15 readings and saves last calibrated value
- Large 3-1/2 digit (2000 count) Digital display with bargraph
- Automatic electronic self calibration for Chlorine and ORP; 1, 2 or 3 point buffer calibration for pH
- Data Hold, Auto shut-off and low battery indication
- Simultaneous display of ppm or pH and °C/°F Temperature
- Automatic Temperature Compensation
Extech RE300: ExStik®ORP Meter
ORP meter with rugged flat surface OPR electrode and high resolution of 1mV

Features:
- Measures ORP/Redox from -999 to 999mV
- Automatic electronic self calibration
- Simulated analog bargraph displays change in ORP reading
- High resolution of 1mV
- Memory stores and recalls 15 readings and saves last calibrated value
- Data validation indicators show user the reading is stabilized
- Data Hold, Auto shut-off and low battery indication
Extech PH110: ExStik® Refillable pH Meter
Unique pH stick meter with rugged refillable flat surface pH electrode
Features:
- Refillable pH electrode that can be reused by refilling the reference solution once it depletes
- Obtains continuous high accuracy using fresh reference solution
- Fast and easy steps to refill your electrode
- Eliminates the concern of electrode shelf life
- 1, 2 or 3 point calibration automatically recognizes buffer solutions.
Order pH buffers separately - Complete with refillable pH electrode, 1.5mL bottle KCI, 2 reference junctions, 2 removal tools, protective cap, sample cup, four 3V CR-2032 batteries, and 48″ (1.2m) neckstrap
Extech PH220-C: Waterproof Palm pH Meter with Temperature
Compact size pH meter with cabled pH electrode
Features:
- Large LCD displays pH or mV and Temperature simultaneously
- Microprocessor provides for Automatic Buffer recognition
- Memory stores 25 readings
- Automatic Temperature Compensation
- Unit is completely waterproof when electrode is connected to the meter
- Low Battery indicator and Auto Power off
- Includes cabled pH electrode, protective holster, pH buffers and 9V battery
Stopwatches
EXTECH HW30: HeatWatch™ Humidity/Temperature Stopwatch
Digital UP/DOWN timer displays Temperature, Humidity, and Heat Index
Features:
- User adjustable Heat Index alarm
- Stopwatch/chronograph mode with 1/100 second resolution
- Fastest/Slowest/Average Lap recall
- 99 lap counter with 30 lap/split memory
- 10 hour countdown timer with audible beeper warning for the last 5 seconds
- Programmable alarm
- Calendar mode displays day, month, and date