Does this meter test for ozone and PH levels?

Dennis,This tester tests for Temperature, ORP and PH (not Ozone).

Does tester test for ozone and PH levels

This meter does not test for pH or Ozone. I bought a cheap pH meter off Amazon , model ATC, a yellow and black rectangular meter, about $10 with shipping, for the pH. I haven't done anything with ozone. The ORP meter tests water temperature and ORP. I didn't buy the calibration fluid which I'm going to have to buy. The first reading was -255 and the next reading a couple of days later was about -20. I don't have any way to calibrate it and the reviews say you have to calibrate regularly. Hope this helps.

The specs on the orp 200 state it will test -999 to +1000 and also that it is factory calibrated to +200. what's the factory calibration of +200 for?

On all ORP meters I have received, over the last 10 years, when you turn it on, the meter will read between 200 and 250. This is normal. Keep the ORP probe wet. Get your self a calibration solution to check and adjust the calibration. This meter comes with a small piece of sand paper. the meter probe needs to be wet sanded once in a while. If you can smell the Ozone in the water the meter reading should be at least 700 ORP.

Does the meter have an on & off switch?

FROM HM DIGITAL: Yes, the ORP-200 have an on/off switch and it's located on the front of the unit. In order to properly turn the unit on, you will first want to remove the cap and then press the `ON/OFF' button. The display will become active. For more information, www.tdsmeter.com/products/orp200.html

Hm Digital Orp 200 Waterproof Orp Meter Measures Oxidation Reduction

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

💧 Stay ahead of water quality with precision and durability in your hands!

READY WHEN YOU ARE - Includes alkaline batteries for immediate use—no extra purchases needed to get started.
COMPACT LIGHTWEIGHT - Weighing just 159g, it’s easy to carry and handle during field testing or lab work.
PRECISION IN EVERY DROP - Accurately measures Oxidation Reduction Potential and temperature for reliable water quality insights.
BUILT TO BRAVE THE ELEMENTS - IP67 waterproof design ensures durability and performance even in wet, rugged environments.
TRUSTED BRAND PROVEN RESULTS - HM Digital’s ORP-200 is a go-to tool for professionals demanding consistent, actionable data.

The HM Digital ORP-200 is a waterproof, battery-powered meter designed to measure oxidation reduction potential and temperature with IP67 protection. Lightweight and portable, it delivers reliable water testing results for professionals in industrial, scientific, and environmental fields.

Specifications

ASIN	B00132GJ0E
Are Batteries Included	Yes
Batteries Are Included	Yes
Battery Description	Alkaline
Best Sellers Rank	#125,540 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #232 in Conductivity Meters & Accessories
Brand	HM Digital
Brand Name	HM Digital
Colour	Green
Customer Reviews	3.7 out of 5 stars 75 Reviews
Global Trade Identification Number	00891144000045
International Protection Rating	IP67
Item Weight	159 g
Manufacturer	HM Digital India, Rajasthan, HM Digital India, Rajasthan
Manufacturer Contact Information	HM Digital India, Rajasthan
Manufacturer Part Number	ORP-200
Material	Plastic
Material Type	Plastic
Model Number	ORP-200
Packer Contact Information	HM Digital India, Rajasthan
UPC	891144000045 612953889764 735090555849
Unit Count	1.00 Piece
Water Resistance Level	Waterproof
Whats In The Box1 - Whats In The Box3	ORP-200 ,USER MANUAL

Reviews

R**P

Cool Product

Its working!!

30.07.2015

A**A

Two Stars

The calibration solution is desperately required and is not available in India. We can not trust the readings.

30.08.2015

T**F

Très bien

J'ai acheté ce produit pour mon entreprise et je l'ai trouvé parfaitement adapté à mon utilisation. Les résultats sembles fiables.

28.06.2018

D**I

OK!

16.11.2020

J**E

Buena relación calidad precio.

Buen tester, llevo varios años utilizándolos en vinificación. Producto muy recomendable.

21.07.2019

G**N

Water tester

Good product I would like to order accessories for it as well.

6.04.2026

S**A

Ideal and works well

I use these to monitor certain levels within a pond when treating with a particular chemical. Its works well and takes the stress out of the process.

19.02.2019

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