Portable pH Orp Conductivity TDS Salinity Resistivity Do Meter

• Display: Digital
• Portable: Portable
• Appliance: Food Analysis, Medical Research, Biochemistry
• Model NO.: SR711, SR721, SR723, SR725, SR731, SR736, SR751
• Certification: ISO9001, RoHS, CE
• pH Range: -2.00 to 19.99pH
• Mv/Orp Range: -1999 Mv ~ +1999mv
• Conductivity Range: 0.00~19.99,20.0~199.9,200~1999us/Cm
• TDS Range: (0 to 100) G/L
• Salinity Range: (0 to 100) Ppt
• Resistivity Range: (0 to 100) Momega.Cm
• Do Range: (0 to 40.00) Mg/L(Ppm) (0 to 200.0)%
• IP Rating: IP57 Dustproof and Waterproof
• Transport Package: Carrying Case
• Specification: 360* 270*76mm/ 1.7kg
• Trademark: ShowRange
• Origin: China
• HS Code: 9025800000
• Production Capacity: 1000PCS/Month

Product Description

MODEL: SR711 pH/mV/Temp. 3-in-1 Portable Meter
Features:
-Built-in microprocessor chip, with the intelligent functions of automatic calibration, automatic temperature compensation, data storage, function setting and automatic self-diagnose, auto power off and low voltage display etc.
-Adopts digital filter and step slipping technology to intelligently improve meter's response speed and result accuracy. ""will appear when reading to be stable.
-Automatically recognize 13 kinds of pH standard buffer solution. User can choose anyone from three series of buffer solutions: Europe & U.S.A. series, NIST series, China series.
-Purified water and ammonia added purified water pH measuring mode can be set up, especially suitable for the fields of electric power and petrochemical etc.
-Meter's circuit board adopts SMT film-covering technology to improve meter's production reliability.
-Meter has the back light LCD display monitor.
-Dustproof and waterproof meter meets IP57 rating.
Specifications:

Measuring range	pH:  (-2.00 ~ 19.99)pH    mV:  ±1999mV
Resolution	pH:  0.1/0.01pH          mV:  1mV
Accuracy	pH:  ±0.01pH            mV: ±0.1%FS
Stability	±0.01 pH/3h
Temp. compensation range	(0 ~ 100) ºC (ATC)
Data storage	200 groups
Storage content	Series number, measuring value, measuring unit and temperature
Power	Two AA batteries (1.5V x2)
Size and weight	Meter: (65×120×31)mm/180g  Carrying case:(255 x 210x 50)mm/790g
Quality and safety certification	ISO9001:2000, CE and CMC

Extech PH300 is OEM made based on ours this meter SR711. They use totally same IC borard and shell, and technology to produce.

Package includes

1. SR711portable meter;	3. pH calibration solution (4.00, 7.00, 10.01pH/50ml)
2. 201T-S plastic pH/ATC 3-in-1 combination electrode	4. Carrying case

Model: SR721 pH/ORP/Temp. Meter
Prominent Features
-Double parameters meter, equips with pH and ORP electrode,calibration solution and special carrying case, easy to use.
-Built-in microprocessor chip, with the intelligent functions of automatic calibration, automatic temperature compensation, data storage, function setting and automatic self-diagnose, auto power off and low voltage display etc.
-Adopts digital filter and step slipping technology to intelligently improve meter's response speed and result accuracy, "" will appear when reading to be stable.
-Automatically recognize 13 kinds of pH standard buffer solution. User can choose anyone from three series of buffer solutions: Europe & U.S.A. series, NIST series, or China series.
-Purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, besides the general slope temperature compensation, also added function of nonlinearity solution temperature compensation to make measurement more accurate, especially suitable for the fields of electric power and petrochemical etc.
-Meter's circuit board adopts SMT film-covering technology to improve meter's production reliability.
-Meter has the back light LCD display monitor.
-Dustproof and waterproof meter meets IP57 rating.
Technical parameter
1. pH:

Measuring range	(-2.00 to 19.99) pH
Resolution	0.1/0.01 pH
Accuracy	Meter:±0.01pH; connect meter with electrode: ±0.02pH
Temp. Compensation range	(0 to 100) ºC (automatic)

2. ORP:

Measuring range (mV/ORP/EH)	-1999 mV to 0 to 1999mV
Resolution	1mV
Accuracy	Meter:±0.1% FS, connect meter with electrode: ±15mV

3. Other Technical Parameters:

Data storage	200 groups
Storage content	Series number, measuring value measuring unit and temperature,
Power	Two AA batteries (1.5V x2)
Size and weight	(360 x 270x 76) mm/1.5kg
Packing	10PCS/CTN, CTN SIZE: 69*39*29CM, G.W: 15KGS, VOLUME WEIGHT: 16KGS
Quality and safety certification	ISO9001:2000, CE and CMC
IP rating	IP57 Dustproof and waterproof

Package includes

1. SR721portable meter;	4. pH calibration solution (4.00, 7.00, 10.01pH/50ml)
2. 201T-S plastic pH/ATC 3-in-1 combination electrode	5. 220mV ORP standard solution(50mL)
3. 301Pt-S ORP combination electrode	6. Carrying case

Model: SR723 pH/mV/Conductivity/TDS/Sal./Res./Temp.  7-in-1 Meter
Extech EC600 is OEM made based on ours this meter SR723. They use totally same IC borard and shell, and technology to produce.
Prominent Features
-Double parameters meter, with pH electrode, conductivity electrode, and with calibration solution and special carrying case, easy to use.
-Built-in microprocessor chip, with the intelligent functions of automatic calibration, automatic temperature compensation, data storage, function setting and automatic self-diagnose, auto power off and low voltage display etc. 
-Adopts digital filter and step slipping technology to intelligently improve meter's response speed and result accuracy. "" will appear when reading to be stable.
-Automatically recognize 13 kinds of pH standard buffer solution. User can choose anyone from three series of buffer solutions: Europe & U.S.A. series, NIST series, China series.
-High purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, besides the general slope temperature compensation, also added function of nonlinearity solution temperature compensation to make measurement more accurate, especially suitable for the fields of electric power and petrochemical etc.
-Adopts advanced automatic frequency convertible and voltage regulation technology to enlarge the measuring range of conductivity electrode which constant K=1 to 10 times. It can meet measuring accuracy requirement for range within 0 to 200mS/cm by using only one-point calibration. It is the particular one-point calibration function for this meter.
-Automatically recognize 8 kinds of conductivity standard solution. User can choose anyone from two series of standard solutions: Europe & USA series and CHINA series.
-Automatically select conductivity measuring range, the meter will do non-linearity temperature compensation test for purified and high purified water less than 10uS/cm, which greatly improve the measuring accuracy. It is especially suitable for use in fields of electric power, microelectronics and medicine.
-Meter's circuit board adopts SMT film-covering technology to improve meter's production reliability.
-Meter has the back light LCD display monitor.
1-Dustproof and waterproof meter meets IP57 rating.
Technical parameter
1. pH:

Measuring range	(-2.00 to 19.99) pH
Resolution	0.1/0.01 pH
Accuracy	Meter:±0.01pH; connect meter with electrode: ±0.02pH
Temp. Compensation range	(0 to 100) ºC (automatic)

2. mV:

Measuring range (mV/ORP/EH)	-1999 mV to 0 to 1999mV
Resolution	1mV
Accuracy	Meter:±0.1% FS, connect meter with electrode: ±15mV

3. Conductivity:

Measuring 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	Meter:±1.0% FS, connect meter with electrode:±1.5% FS
Temp. compensation range	(0 to 50) ºC (automatic)
Electrode constant	0.1 / 1 / 10 cm-1
Benchmark temperature	25ºC, 20ºCand 18ºC

4. Other Technical Parameters:

Data storage	300 groups
Storage content	Series number, measuring value measuring unit and temperature,
Power	Two AA batteries (1.5V x2)
Size and weight	(360 x 270x 76) mm/1.7kg
Quality and safety certification	ISO9001:2000, CE and CMC
IP rating	IP57 Dustproof and waterproof

Package includes

1. SR723portable meter;	4. pH calibration solution (4.00, 7.00, 10.01pH/50ml)
2. 201T-S plastic pH/ATC 3-in-1 combination electrode	5. Conductivity calibration solution (1413μS/cm/50ml)
3. 2301-S plastic conductivity electrode (ATC, K=1)	6. Carrying case

Model: SR725  pH/mV/DO/Temp. 4-in-1 Meter
Prominent Features
1. Double parameters meter, with pH and DO electrode, also with calibration solution and special carrying case, easy to use.
2. Built-in microprocessor chip, with the intelligent functions of automatic calibration, automatic temperature compensation, data storage, function setting and automatic self-diagnose, auto power off and low voltage display etc.
3. Adopts digital filter and step slipping technology to intelligently improve meter's response speed and result accuracy. "" will appear when reading to be stable.
4. It automatically recognizes 13 kinds of pH standard buffer solution. User can choose anyone from three series of buffer solutions: Europe & U.S.A. series, NIST series and China series.
5. Purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, besides the general slope compensation, also added function of nonlinearity temperature compensation for pH values of solution to make measurement more accurate, especially suitable for use in the fields of electric power and petrochemical etc.
6. Equipped with new type of DO electrode with temperature and salinity sensor which makes DO measuring mode has auto temperature compensation, auto salinity compensation and manual barometric pressure compensation. It's easy to use and accurate to measure.
7. Polarogram type DO electrode has special electrode calibration cap. Only needs 3 to 5 minutes for electrode polarization. Electrode adopts combination diaphragm cap which very convenient to use. Each DO electrode equips with three spare diaphragms caps.
8. Meter's circuit board adopts SMT film-covering technology to improve meter's production reliability.
9. Meter has the blue back light LCD display monitor.
10. Dustproof and waterproof meter meets IP57 rating.
Technical parameter
1. pH:

Measuring range	(-2.00 to 19.99) pH
Resolution	0.1/0.01 pH
Accuracy	Meter:±0.01pH; connect meter with electrode: ±0.02pH
Temp. Compensation range	(0 to 100) ºC (automatic)

2. mV:

Measuring range (mV/ORP/EH)	-1999 mV to 0 to 1999mV
Resolution	1mV
Accuracy	Meter:±0.1% FS, connect meter with electrode: ±15mV

3. Dissolved Oxygen:

Measuring range	(0 to 40.00) mg/L(ppm)  (0 to 200.0) %
Resolution	0.1/0.01 mg/L(ppm)  1/0.1%
Accuracy	Meter:±0.10 mg/L, connect meter with electrode:±0.40 mg/L
Temp. Compensation range	(0 to 45) ºC (automatic)
Salinity compensation range	(0 to 45) ppt (automatic)
Barometric pressure compensation range	(66 to 200) kPa (manual)
Automatic calibration	Air saturated by water; water saturated by air
Electrode type	Polarogram type

4. Other Technical Parameters:

Data storage	300 groups
Storage content	Series number, measuring value measuring unit and temperature,
Power	Two AA batteries (1.5V x2)
Size and weight	(360 x 270x 76) mm/1.7kg
Quality and safety certification	ISO9001:2000, CE and CMC
IP rating	IP57 Dustproof and waterproof

Package includes

1. SR725 portable meter;	4. pH calibration solution (4.00, 7.00, 10.01pH/50ml)
2. 201T-S plastic pH/ATC 3-in-1 combination electrode	5. Carrying case
3. DO500 DO electrode, 3pcs of membrane caps inner solution for DO probe (30ml)

Model: SR731 pH/ORP/Conductivity/TDS/Sal./Res./Temp. 7-in-1 Meter
Prominent Features
1. Multi-parameter meter, equipped with pH electrode, ORP electrode, conductivity electrode, equips with calibration solution and special carrying case, easy to use.
2. Built-in microprocessor chip, with the intelligent functions of automatic calibration, automatic temperature compensation, data storage, function setting and self-diagnose information, auto power off and low voltage display etc.
3. Adopts digital filter and step slipping technology to intelligently improve meter's response speed and result accuracy. "" will appear when reading to be stable.
4. Automatically recognize 13 kinds of pH standard buffer solution. User can choose anyone from three series of buffer solutions: Europe & U.S.A. series, NIST series, China series.
5. High purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, besides the general slope temperature compensation, also added function of nonlinearity solution temperature compensation to make measurement more accurate, especially suitable for the fields of electric power and petrochemical etc.
6. Adopts advanced automatic frequency convertible and voltage regulation technology to enlarge the measuring range of conductivity electrode which constant K=1 to 10 times. It can meet measuring accuracy requirement for range within 0 to 200mS/cm by using only one-point calibration. It is the particular one-point calibration function for this meter.
7. Automatically recognize 8 kinds of conductivity standard solution. User can choose anyone from two series of standard solutions: Europe & USA series and China series.
8. Automatically select conductivity measuring range, the meter will do non-linearity temperature compensation test for purified and high purified water less than 10uS/cm, which greatly improve the measuring accuracy. It is especially suitable for use in fields of electric power, microelectronics and medicine.
9. Meter's circuit board adopts SMT film-covering technology to improve meter's production reliability.
10. Meter has the blue backlight LCD display.
11. Dustproof and waterproof meter meets IP57 rating.
Technical parameter
1. pH:

Measuring range	(-2.00 to 19.99) pH
Resolution	0.1/0.01 pH
Accuracy	Meter:±0.01pH; connect meter with electrode: ±0.02pH
Temp. Compensation range	(0 to 100) ºC (automatic)

2. ORP(mV):

Measuring range (mV/ORP/EH)	-1999 mV to 0 to 1999mV
Resolution	1mV
Accuracy	Meter:±0.1% FS, connect meter with electrode: ±15mV

3. Conductivity:

Measuring 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	Meter:±1.0% FS, connect meter with electrode:±1.5% FS
Temp. compensation range	(0 to 50) ºC (automatic)
Electrode constant	0.1 / 1 / 10 cm-1
Benchmark temperature	25ºC, 20ºCand 18ºC

4. Other Technical Parameters:

Data storage	300 groups
Storage content	Series number, measuring value measuring unit and temperature,
Power	Two AA batteries (1.5V x2)
Size and weight	(360 x 270x 76) mm/1.7kg
Quality and safety certification	ISO9001:2000, CE and CMC
IP rating	IP57 Dustproof and waterproof

Package includes

1. SR731portable meter;	5. pH calibration solution (4.00, 7.00, 10.01pH/50ml)
2. 201T-S plastic pH/ATC 3-in-1 combination electrode	6. Conductivity calibration solution (1413μS/cm/50ml)
3. 301Pt-S ORP combination electrode	7. Carrying case
4. 2301-S plastic conductivity electrode (ATC, K=1)

Model: SR736 pH/mV/Conductivity/TDS/Sal./Res./DO/Temp. 8-in-1 Meter
Extech DO700 is OEM made based on ours this meter SR736. They use totally same IC borard and shell, and technology to produce.
Prominent Features
1. Multi-parameter meter, equipped with pH electrode, ORP Electrode, conductivity electrode, temperature electrode, DO
electrode, when connect the electrode to the meter, the meter can automatically know the electrode, easy to use.
2. Built-in microprocessor chip.. Its features up to automatic calibration, automatic temperature compensation, data storage, auto power off, low voltage indication, functions setting and automatic self-diagnose etc. 
3. Adopts digital filter and step slipping technology to intelligently improve meter's response speed and result accuracy. "" will appear when reading to be stable.
4. Automatically recognize 13 kinds of pH standard buffer solution. User can choose anyone from three series of buffer solutions: Europe & U.S.A. series, NIST series, and China series.
5. High purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, besides the general slope temperature compensation, also added function of nonlinearity solution temperature compensation to make measurement more accurate, especially suitable for the fields of electric power and petrochemical etc.
6. Adopts advanced automatic frequency convertible and voltage regulation technology to enlarge the measuring range of conductivity electrode which constant K=1 to 10 times. It can meet measuring accuracy requirement for range within 0 to 200mS/cm by using only one-point calibration. It is the particular one-point calibration function for this meter.
7. Automatically recognize 8 kinds of conductivity standard solution. User can choose anyone from two series of standard solutions: Europe & USA series and CHINA series.
8. Automatically select conductivity measuring range, the meter will do non-linearity temperature compensation test for purified and high purified water less than 10uS/cm, which greatly improve the measuring accuracy. It is especially suitable for use in fields of electric power, microelectronics and medicine.
9. Equips new type of DO electrode with temperature and salinity sensor which has function of automatic temperature compensation and automatic salinity compensation as well as manual Atmospheric pressure compensation inside meter, easy to use, accurate to measure.
10. Polarogram type DO electrode has special electrode calibration cap. Only needs 3 to 5 minutes for electrode polarization. Electrode adopts combination diaphragm cap which very convenient to use. Each DO electrode equips with three spare diaphragms caps.
11. Meter's circuit board adopts SMT film-covering technology to improve meter's production reliability.
12. Meter has the back light LCD display monitor.
13. Dustproof and waterproof meter meets IP57 rating.
Technical parameter
1. pH:

Measuring range	(-2.00 to 19.99) pH
Resolution	0.1/0.01 pH
Accuracy	Meter:±0.01pH; connect meter with electrode: ±0.02pH
Temp. Compensation range	(0 to 100) ºC (automatic)

2. Conductivity:

Measuring 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	Meter:±1.0% FS, connect meter with electrode:±1.5% FS
Temp. compensation range	(0 to 50) ºC (automatic)
Electrode constant	0.1 / 1 / 10 cm-1
Benchmark temperature	25ºC, 20ºCand 18ºC

3. Dissolved Oxygen:

Measuring range	(0 to 40.00) mg/L(ppm)  (0 to 200.0) %
Resolution	0.1/0.01 mg/L(ppm)  1/0.1%
Accuracy	Meter:±0.10 mg/L, connect meter with electrode:±0.40 mg/L
Temp. Compensation range	(0 to 45) ºC (automatic)
Salinity compensation range	(0 to 45) ppt (automatic)
Barometric pressure compensation range	(66 to 200) kPa (manual)
Automatic calibration	Air saturated by water; water saturated by air
Electrode type	Polarogram type

4. Other Technical Parameters:

Data storage	400 groups
Storage content	Series number, measuring value measuring unit and temperature,
Power	Two AA batteries (1.5V x2)
Size and weight	(360 x 270x 76) mm/1.7kg
Quality and safety certification	ISO9001:2000, CE and CMC
IP rating	IP57 Dustproof and waterproof

Package includes

1. SR736portable meter;

2. 201T-S plastic pH/ATC 3-in-1 combination electrode

3. 2301-S plastic conductivity electrode (ATC, K=1)

4. DO500 DO electrode, 3pcs of membrane caps inner solution for DO probe (30ml)

5. pH calibration solution (4.00, 7.00, 10.01pH/50ml)

6. Conductivity calibration solution (1413μS/cm/50ml)

7. Carrying case

8. Battles (1.5V x 2) 

9. Operation Manual

Model: SR751 pH/ORP/Conductivity/TDS/Sal./Res./DO/Temp. 8-in-1 Meter
Prominent Features
1. Multi-parameter meter, equipped with pH electrode, ORP Electrode, conductivity electrode, temperature electrode, DO
electrode, when connect the electrode to the meter, the meter can automatically know the electrode, easy to use.
2. Built-in microprocessor chip.. Its features up to automatic calibration, automatic temperature compensation, data storage, auto power off, low voltage indication, functions setting and automatic self-diagnose etc.
3. Adopts digital filter and step slipping technology to intelligently improve meter's response speed and result accuracy. ""  will appear when reading to be stable.
4. Automatically recognize 13 kinds of pH standard buffer solution. User can choose anyone from three series of buffer solutions: Europe & U.S.A. series, NIST series, and China series.
5. High purified water and ammonia added purified water pH measuring mode can be set up, for this two special pH measuring modes, besides the general slope temperature compensation, also added function of nonlinearity solution temperature compensation to make measurement more accurate, especially suitable for the fields of electric power and petrochemical etc.
6. Adopts advanced automatic frequency convertible and voltage regulation technology to enlarge the measuring range of conductivity electrode which constant K=1 to 10 times. It can meet measuring accuracy requirement for range within 0 to 200mS/cm by using only one-point calibration. It is the particular one-point calibration function for this meter.
7. Automatically recognize 8 kinds of conductivity standard solution. User can choose anyone from two series of standard solutions: Europe & USA series and CHINA series.
8. Automatically select conductivity measuring range, the meter will do non-linearity temperature compensation test for purified and high purified water less than 10uS/cm, which greatly improve the measuring accuracy. It is especially suitable for use in fields of electric power, microelectronics and medicine.
9. Equips new type of DO electrode with temperature and salinity sensor which has function of automatic temperature compensation and automatic salinity compensation as well as manual Atmospheric pressure compensation inside meter, easy to use, accurate to measure.
10. Polarogram type DO electrode has special electrode calibration cap. Only needs 3 to 5 minutes for electrode polarization. Electrode adopts combination diaphragm cap which very convenient to use. Each DO electrode equips with three spare diaphragms caps.
11. Meter's circuit board adopts SMT film-covering technology to improve meter's production reliability.
12. Meter has the back light LCD display monitor.
13. Dustproof and waterproof meter meets IP57 rating.
Technical parameter
1. pH:

Measuring range	(-2.00 to 19.99) pH
Resolution	0.1/0.01 pH
Accuracy	Meter:±0.01pH; connect meter with electrode: ±0.02pH
Temp. Compensation range	(0 to 100) ºC (automatic)

2. ORP(mV):

Measuring range (mV/ORP/EH)	-1999 mV to 0 to 1999mV
Resolution	1mV
Accuracy	Meter:±0.1% FS, connect meter with electrode: ±15mV

3. Conductivity:

Measuring 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	Meter:±1.0% FS, connect meter with electrode:±1.5% FS
Temp. compensation range	(0 to 50) ºC (automatic)
Electrode constant	0.1 / 1 / 10 cm-1
Benchmark temperature	25ºC, 20ºCand 18ºC

4. Dissolved Oxygen:

Measuring range	(0 to 40.00) mg/L(ppm)  (0 to 200.0) %
Resolution	0.1/0.01 mg/L(ppm)  1/0.1%
Accuracy	Meter:±0.10 mg/L, connect meter with electrode:±0.40 mg/L
Temp. Compensation range	(0 to 45) ºC (automatic)
Salinity compensation range	(0 to 45) ppt (automatic)
Barometric pressure compensation range	(66 to 200) kPa (manual)
Automatic calibration	Air saturated by water; water saturated by air
Electrode type	Polarogram type

5. Other Technical Parameters:

Data storage	400 groups
Storage content	Series number, measuring value measuring unit and temperature,
Power	Two AA batteries (1.5V x2)
Size and weight	(360 x 270x 76) mm/1.7kg
Quality and safety certification	ISO9001:2000, CE and CMC
IP rating	IP57 Dustproof and waterproof

Package includes

1. SR751portable meter;	5. DO500 DO electrode  3pcs of membrane caps inner solution for DO probe (30ml)
2. 201T-S plastic pH/ATC 3-in-1 combination electrode	6. pH calibration solution (4.00, 7.00, 10.01pH/50ml)
3. 301Pt-S ORP combination electrode	7. Conductivity calibration solution (1413μS/cm/50ml)
4. 2301-S plastic conductivity electrode (ATC, K=1)	8. Carrying case