ORP Meter with PH and Thermometer DW99

ORP Meter with PH and Thermometer DW99
ORP Meter with PH and Thermometer DW99 ORP Meter with PH and Thermometer DW99 ORP Meter with PH and Thermometer DW99 ORP Meter with PH and Thermometer DW99
Product Code: DW99
Availability: In Stock
Price: Rp.1,200,000
   - OR -   

ORP Meter + PH Meter + Thermometer 3 in 1


Ideal digunakan untuk mengukur kualitas air pada produksi air minum/ food processing, kolam renang, rumah sakit, Aquarium, Rumah Tangga, Lab, dan water testing secara umum.

This ORP meter Designed for simultaneous pH, temperature, and ORP measurements.
All pH readings are automatically temperature compensated(ATC).
Measurements are highly accurate with a unique stability indicator right on the LCD.
The pH electrode, supplied with the meter, is interchangeable and can be easily replaced by the user.

MV 0 ~ ±1999m
pH 0.00 to 14.00 p
Temperature 0 to 55°C

2.Resolution:MV 1 mV ; PH 0.01 PH ; Temperature 0.1°C

Mv ±5mV
pH ±0.1 pH
Temperature ±1°C

4.Power Supply 4 x batere jam LR44 / AG13
5.Dimensions 170 x 40 x 23 mm. Weight 100g



Apa itu ORP ? / What is ORP?

In the world that surrounds us, we do not see it, but there is a continuous exchange of electrons that takes place between substances in the air, in the earth, in water, and in our bodies.  This phenomenon is known as ion exchange.

In an effort to reach a state of stability, substances that are lacking electrons are desperately seeking out electrons wherever they can: these substances are referred to as oxidizing agents.  On the contrary, substances which have a surplus of electrons are capable of donating their extra electrons: these substances are referred to as reducing agents, or anti-oxidizing agents.

Oxidation-reduction potential, or ORP, is a measurement that indicates the degree to which a substance is capable of oxidizing or reducing another substance.   ORP is measured in millivolts (mv) using an ORP meter.

A positive (+) ORP reading indicates that a substance is an oxidizing agent.  The higher the reading, the more oxidizing it is.  As such, a substance with an ORP reading of +400 mv is 4 times more oxidizing than a substance with an ORP reading of +100 mv.
A negative (-) ORP reading indicates that a substance is a reducing agent.  The lower the reading, the more anti-oxidizing it is.  As such, a substance with an ORP reading of -400 mv is 4 times more anti-oxidizing than a substance with an ORP reading of -100 mv.

Most types of water, including tap water and bottled water, are oxidizing agents as their ORP value is positive.

Alkaline ionized water is an anti-oxidizing agent, as it has a negative ORP value and it is able to donate extra electrons to neutralize the harmful effects of free radicals on the body.  Most other types of water are oxidizing agents as their ORP is positive.

The following video explains ORP and shows the ORP level of different kinds of water.

source: Aqua Health Product






Another Source

What is ORP?

ORP is a term used frequently in the water treatment & food processing industry.  ORP stands for Oxidation-Reduction Potential.  So what is that?  The best definition I can give is that “ORP is a measure of the cleanliness of the water & its ability to break down contaminants”.  It has a range of –2,000 to + 2,000 and units are in “mV” (millivolts).  Since ozone is an oxidizer, we are only concerned with positive ORP levels (above 0 mV).

ORP Level (mV)



No practical use




Cooling Towers


Swimming pools


Hot Tubs


Water Disinfection *


Water Sterilization **

ORP sensors work by measuring the dissolved oxygen.  More contaminants in the water result in less dissolved oxygen because the organics are consuming the oxygen and therefore, the lower the ORP level.  The higher the ORP level, the more ability the water has to destroy foreign contaminants such as microbes, or carbon based contaminants.  The chart on the left identifies ORP levels for various applications.


ORP level can also be viewed as the level of bacterial activity of the water because a direct link occurs between ORP level and Coliform count in water.  The chart to the right lists ORP levels and relative Coliform counts.

ORP Level

Coliform count in 100 ml of water










How does an ORP meter work?

An ORP meter measures very small voltages generated with a probe placed in ozonated water.  The electrode is made of platinum or gold, which reversibly looses its electrons to the oxidizer.  A voltage is generated which is compared to a silver (reference) electrode in a silver salt solution, similar to a pH probe.  The more oxidizer available, the greater the voltage difference between the solutions.


ORP cannot be used as a direct indicator of dissolved ozone residual, except in very clean water applications.

ORP is a convenient measure of ozone’s ability to perform a chemical task.  ORP is valid over a wide pH range, and ORP probes are rugged enough to be place into processes for in-line measurement. The probes can withstand process pressures in excess of 30 PSI.

ORP and Ozone
In a clean water system, using ORP to measure the dissolved ozone status works well.  In our experience, however, even the strong oxidizing power of ozone in moderate turbidity (cloudiness) systems can result in ORP values far below expected and even negative (reducing) values.  In general, monitoring ozone with ORP at the generator source works well but measuring dirty water becomes unreliable.  Ozone detection kits are available and work well at the limit of approved concentrations for your application.





Untuk Alat analisa air/ Water tester, kami juga menjual:

PH Meter lengkapnya di:

TDS Meter lengkapnya di:

EC Conductivity Meter lengkapnya di:

ORP Meter lengkapnya di:

Salinity Meter lengkapnya di:

Chlorine Tester lengkapnya di:

Turbidity Meter lengkapnya di:

Dissolved Oxygen Meter lengkapnya di:

Refractometer lengkapnya di:

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