The Apera Instruments YD300 is specially designed for fast and accurate measurement of water hardness (the concentration of calcium ions Ca2+ and magnesium ions Mg2+). The YD300 is equipped with a proprietary601-S water hardness electrode that has been proven to provide the same accuracy as the traditional volumetric EDTA method, but is much more convenient to perform measurements. Unlike the traditional EDTA method, it is not necessary to stir the samples or add reagents during measurements, and the ion concentration of the sample solutions can be measured directly as in pH measurements.

The meter uses an intelligent chip design that supports automatic calibration, data storage (up to 99 groups), and a low battery voltage indicator. The YD300 allows switching between eight common water hardness units, including mmol/L, mg/L (CaCO3), mg/L (CaO), mmol/L (Boiler), mg/L (Ca), ˚fH (France Degree), ˚dH (German Degree), and ˚eH (England Degree).

Application of electrode method to measure hardness, with the same accuracy as EDTA titration method, but much more convenient.
Patented 601-S 3-in-1 water hardness electrode: combines a measuring electrode, a reference electrode and a temperature electrode in one instrument.
Intelligent chip design ensures stable performance potential, fast response time and convenient handling;
Store 99 data; automatic calibration and temperature compensation (ATC), automatic lockout and shutdown.
Portable IP57 waterproof design, equipped as a complete set with a rugged carrying case; suitable for laboratory and field use.

The YD300 is waterproof according to IP57 and is supplied as a complete set. This kit contains the Model 601-S water hardness electrode, water hardness calibration solutions (B1, B2 and B3); matching calibration bottles, water hardness activation solution, a 20 ml test cup, a test cup stand, 2 AA batteries and a quick reference guide in a rugged carrying case. Applications: potable water, wastewater, cooling towers, boilers, piping, aquaculture, pools & spas. Two-year manufacturer’s warranty on the device (6 months on the electrode).

Water Hardness : Measuring range (0 ~ 10) mmol/l; (0 ~ 401) mg/l(Ca)；(0 ~ 1000) mg/l(CaCO3); (0 ~ 100）ºfH(French unit)；
(0 ~ 561) mg/l(CaO); (0 ~ 56）ºdH(German unit)；(0 ~ 20) mmol/l(kettle)； (0 ~ 70) ºeH (English unit).
Resolution : 0.01 / 0.1 Water hardness units
Accuracy : ±5% F.S
Temperature compensation : (5 ~ 50°C)（automatic)
Calibration points : 2.00×10-2 mmol/l (B1 calibration solution), 2.00×10-1 mmol/l (B2 calibration solution)
2.00 mmol/l (B3 calibration solution)
Calibration mode : – B1/B2 calibration, suitable for low concentrated water (< 2.00×10-2 mmol/l), e.g. boiler water - B2/B3 calibration, suitable
for general water quality
Temperature : Recommended Operating temp. : 0 ~ 60°C (32 ~ 140°F)
Resolution : 0,1°C
Accuracy : ±0,5°C
Data storage : 99 groups
Storage data : Serial number of measured value, measured value, units, Temperature and calibration method
Power supply : 2 AA batteries (1.5V×2)
Dimensions/Weight : Gauge: (65×120×31) mm/180g; Carrying case: (255×210×50) mm/790g Quality and safety certificate
Ambient temperature : 5 ~ 35°C (41 ~ 95ºF)
Humidity : ≤85%
Housing protection class : IP57, dust and waterproof

Technical Specification
Carrying caseing including solutions: YesElectrodes: LabSen803
IP Rating: IP57
Datalogger: No
Date and Time: No
Output: No
Features
:
This Portable pH Meter has a ±0.01 pH accuracy in a range of 0-14 pH, and Temperature Range: 0 to 80°C(32 to 176°F), Auto Calibration with auto-recognition of up to 12 kinds of buffer solutions, Auto. Temp. Compensation, and supports stable reading/auto-hold display mode.

Intelligent Functions: Self Diagnosis reminds of out-of-range measurement, incorrect calibration, and electrode invalidation. Other functions include auto. calibration, auto. lock, easy parameter settings, pH electrode's slope display, auto. power off, etc.

Reliable Structure Design: foldable stand allows use as a benchtop meter; The rubber boot gives you a nice and firm grip; IP57 waterproof rating; Powered by 3 AA alkaline batteries.

Technical Specs

pH Range: 0 to 14 pH

Resolution: 0.01/0.1 pH

Accuracy: ±0.01 pH ±1 digit

Temperature Compensation: 0 to 100°C (Auto or Manual)

mV Range: -1000 mV - 0 - 1000 mV

Resolution: 1 mV

Accuracy: ±0.2% F.S ±1 digit

Temp Range: 0 to 100°C (23 to 212°F)

Resolution: 0.1°C

Accuracy: ±0.5°C ±1 digit

Other Specs

AA Batteries * 3 / DC5V (USB port)

IP Ranking: IP57 dust-proof and waterproof

Dimensions& Weight Meter: (88_170_33 ) mm/ 313g With case_(360_270_76) mm/ 1.6kg

pH Electrode (LabSen 803) Specs

Housing Material: Lead-free glass

Temperature sensor: Yes

Junction: Movable sleeve

Reference Electrode: Silver ion trap

Electrolyte: 3M KCL

Shape of glass membrane: Cylindrical

Range: 1 to 11 pH

Temperature Range: 0 to 80°C (32 to 176°F)

Basic Features :
- Intelligent functions : auto. calibration, auto. temperature compensation, self-diagnosis, data logging, auto. power off, and more.
- Digital filter technology : enhance the meter’s response time and measurement accuracy
- Automatic electrode recognition : the meter automatically switches to the right parameter mode according to the connected electrode
- Data logging : 400 sets of data storage and recall
- Built tough : IP57 water-resistant structure, ideal for use in harsh environment

pH
Measurement range : (-2.00 to 19.99) pH
Resolution : 0.1/0.01 pH
Accuracy : ±0.01pH±1 digit
Input current : ≤2×10-12 A
Input impedance : ≥1×1012 Ω
Temp. compensation range : (0 to 100) ˚C (automatic)

ORP
Measurement range (mV/ORP/EH) : -1999 mV to 1999mV
Resolution : 1mV
Accuracy : ±15mV

Conductivity
Measurement range Conductivity:
(0.00 to 19.99) μS/cm (20.0 to 199.9) μS/cm
(200 to 1999) μS/cm (2.00 to 19.99) mS/cm
(20.0 to 199.9) mS/cm
TDS: (0 to 100) g/L; Salinity : (0 to 100) ppt
Resistivity : (0 to 100) MΩ·cm
Resolution : 0.01/0.1/1μS/cm; 0.01/0.1 mS/cm
Accuracy : ±1.0% F.S
Temp. compensation range : (0 to 50) ˚C (automatic)
Electrode constant : 0.1 / 1 / 10 cm-1
Reference temperature : 25˚C, 20˚C, and 18˚C

Dissolved Oxygen
Measurement range : (0 to 19.99) mg/L (ppm); (0 to 200.0) %
Resolution : 0.1/0.01 mg/L (ppm) 1/0.1%
Accuracy : ±0.30 mg/L (ppm)
Response time : ≤30 seconds (25˚C, 90% response)
Temp. compensation range : (0 to 45) ˚C (automatic)
Salinity compensation range : (0 to 45) ppt (automatic)
Barometric pressure compensation range : (66 to 200) kPa (manual)
Automatic calibration : One or two points at 100% (water-saturated air) and 0%
Electrode type : Polarographic

Other Technical Parameters
Data storage : 400 sets
Data content : Serial number, measurement value, measurement unit, and temperature
Power Supply : Two AA alkaline batteries (1.5V x2)
Dimensions and weight Meter: (65×120×31) mm/180g
Dimensions and weight Complete Kit: (255 x 210x 50) mm/1760g
Quality and safety certification : CE, ISO 9001:2015

Working Condition
Working temperature : 5 to 35˚C
Working humidity : ≤85%
IP rating : IP57 water-resistant

Feature :
- Quick and easy 1 to 3 points auto. pH calibration, automatically recognizing pH standards of 1.68, 4.00, 7.00, 10.01, 12.45.
- Built-in self-diagnosis ensures pH calibration will be performed correctly and guides you on how to fix common problems.
- Ideal for use in harsh environments — IP57 Waterproof rating, silicone socket protector and rubber boot protect the instrument from general impact.
- The large LCD displays pH and temperature along with icons of stable readings and finished calibrations.
- Standard BNC connector, compatible with Apera's LabSen® Series professional pH electrodes for other applications.

Technical Specifications
pH
Measuring Range（0 to 14.00）pH
Resolution 0.1/0.01 pH
Accuracy ±0.01 pH ±1 digit
Temperature Compensation Range (0 to 100)˚C (Auto. or Manual)
Calibration point 1 to 3 points
mV
Measuring Range ±1000mV
Resolution 1mV
Accuracy ±0.2% FS ±1 digit
Temp.
Measuring Range 0 to 100℃
Resolution 0.1℃
Accuracy ±0.5℃±1 digit
Power 3* AA alkaline batteries
Dimension & Weight
Meter: (88*170*33)mm / 313g
Case: (360*270*76)mm / 1.6kg
Connector
BNC for pH and ORP; RCA for temperature
What's in the box? PH850 meter, 201T-F pH/temp. electrode, 50ml of pH buffers (4.00, 7.00), 50ml of conductivity standards (1413µS, 12.88mS), instruction manual, screwdriver (for battery replacement), carrying case

Technical Specification:
Range -2 ~ 16 PH
Resolution 0.01 PH; ± 0.01 PH
Accuracy ± 0.01 pH ; ± 0.5 C
Calibration auto buffer recognation
Temp 0-50.0 C
IP Rating IP167 Water-proof and dust proof; floats on water
Power DC 3 V, AAA Batteries x 4
Battery Life Continuous operation up to 2000 hours

Dimensions& Weight Tester: (40*40*178) mm/ 133g With case_(255*210*50) mm/ 700g

Electrode's Technical Specs

Application
Regular water solution testing, such as pools and spas, hydroponics, tap water, drinking water, water treatment, aquaculture, cooling towers, etc.
Shape of glass membrane
Bulb
Replaceable Yes
Temperature sensor Yes
Junction Single Junction Ceramic
Reference Eelctrode Ag/AgCl
Electrolyte KCL Gel
Range 0 to 14 pH
Temperature Range 0 to 50°C (32 to 122°F)

Technical Specification
Carrying caseing including solutions: YesElectrodes: 201T-F/2301T-F
IP Rating: IP57
Datalogger: No
Date and Time: No
Output: No
Features
:

Portable pH/Conductivity Meter Kit PC 850
Model : PC 850

* PH
Measuring Range PH :（0 to 14.00）pH
Resolution : 0.1/0.01 pH
Accuracy :±0.01 pH ±1 digit
* MV
Range : ±1000mV
Resolution : 1mV
Accuracy : ±0.2% FS ±1 digit
* Temp Range
Range : 0 to 100Ԩ
Resolution : 0.1℃
Accuracy : ±0.5℃±1 digit
* Conductivity
Cond Range : Conductivity：0~200 mS/cm,
Resolution : 0.01/0.1/1μS/cm 0.01/0.1 mS/cm
Accuracy : ±1.0% FS ±1 digit