SKU: 86757739441

Ohaus ST400M-G pH & Conductivity Portable

Sale price$554.53 Regular price$616.15
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Ships within 48 hours · Estimated delivery Sep 4 - Sep 9

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Description

Ohaus ST400M-G pH & Conductivity PortableOhaus ST400M G pH & Conductivity Portable Ohaus ST400M G Portable Water Analysis Meters are robust, lightweight, battery operated units with waterproof housing which makes them ideal for prolonged use in wet environments, and a rubber protective case fit for field testing. A rechargeable lithium battery ensures hours of trouble free testing in the field. Intuitive software and an easy to view LCD allows for simple operation. A built in USB port

Ohaus ST400M-G pH & Conductivity Portable


Ohaus ST400M-G Portable Water Analysis Meters are robust, lightweight, battery-operated units with waterproof housing which makes them ideal for prolonged use in wet environments, and a rubber protective case fit for field testing. A rechargeable lithium battery ensures hours of trouble-free testing in the field. Intuitive software and an easy-to-view LCD allows for simple operation. A built-in USB port enables easy data transfer.

• IP67 Waterproof Housing for Working in Wet Environments 

• Rechargeable Lithium Battery Ensures Less Downtime: provides 40 hours of uninterrupted use and more than 300 charge cycles

• Easy to Operate with Intuitive Software and Information Displayed: guides the user through operation. All necessary information to run tests successfully such as electrode condition is displayed clearly on the large LCD.

• Equipped with Large Storage Capacity and Ability to Transfer Data Easily Via USB: storage capacity of 1000 records. Data can be quickly transferred to a laptop via the micro-USB port, ensuring that users can retain every measurement.

Includes:

  • ST400M Meter with Electrode Clip, Wrist Strap and Batteries
  • ST320 IP67 3m probe
  • STCON3 IP67 3m probe
  • Portable Bag

Specifications:

Measurement Range

  • -2.00 – 16.00 pH
  • -1999 – 1999 mV 
  • 00.0 μS/cm – 199.9 mS/cm (Conductivity)
  • 0.1 mg/L – 199.9 g/L (TDS)
  • 0-99.9 psu (Salinity)
  • 0-20 MΩ•cm (Resistivity)
  • -5 °C – 110 °C (Temperature)

Accuracy

  • ±0.01 pH
  • ±1 mV
  • ± 0.5 % F.S.
  • ±0.3 °C

Measurement Resolution

  • 0.01 pH
  • 1 mV
  • 0.1 μs/cm
  • 0.01 mg/L
  • 0.01 psu
  • 0.01 Ω•cm
  • 0.1 °C

Display

LCD Backlit Display

Electrose

ST320 IP67 3m (Included);  STCON3 IP67 3m (Included) 

Accuracy ± (mV)

1 mV

Accuracy ± (Temperature)

0.3 °C

Battery Life

40 Hours with Rechargeable Battery

Conductivity accuracy (±)

0.5 %

Conductivity measuring range

0.01 μS/cm-199.9 mS/cm

Dimensions

1.57 in x 9.05 in x 3.94 in (40 mm x 230 mm x 100 mm) (HxLxW) 

Measurement Range (Temperature)

-5 °C – 110 °C

Measurement Range

-1,999 mV – 1,999 mV

Net Weight

0.77 lb (0.35 kg)

pH accuracy (±)

0.01

pH measuring range

-2 – 16

pH resolution

0.01

Resistivity measuring range

0 MOhm – 20 MOhm

Resistivity resolution

0.01 MOhm

Resolution Cond. (Variable)

0.1 – 199.9

Resolution (Voltage)

1 mV

Temperature Compensation

Automatic

Temperature Resolution

0.1 °C

Temperature Sensor

30 KΩ NTC

Working Environment

41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80%RH, non-condensing)


Literature:
ST400 Data Sheet
ST400 Manual


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 86757739441

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4.5 ★★★★★
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Verified Purchase
Bstew
Lake Worth, US
★★★★★ 4
Ash vs. Moisture/Success?
Scent: Smoky coffee, Size: 4 Fl Oz (Pack of 1)
The product feels great on the skin and moisturizes well. Although, don't be fooled by the smokey coffee detail. I'm an avid expresso bean grinder and drinker, this is no coffee. Smells like strong chain smokers favorite corner of the house on a stressful day. Imagine ash trays and Jojoba blended. Now that that's explained, it genuinely feels great on the skin/beard/scalp. Unfortunately, I am unsure how long my wife will tolerate this as a nighttime routine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 9, 2025
D
Verified Purchase
denise varnell
Massapequa, US
★★★★★ 5
Strong coffee smell. Might not be be compatible for everyone. However, product is really good.
Scent: Smoky coffee, Size: 4 Fl Oz (Pack of 1)
Love this product. May not be compatible for someone who doesn't like smell of coffee that does not detract from the product. it's really good for hair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 5, 2026
N
Verified Purchase
Natalie
Dallas, US
★★★★★ 3
So far nothing amazing
Scent: Smoky coffee, Size: 4 Fl Oz (Pack of 1)
So I’ve been using for a couple of weeks now and I haven’t noticed any difference. I am going to continue on. I don’t know if it takes time for it to actually show some results. I will say two things about it. It comes solid for 12 my jar cracked and broken And it’s non-returnable so I just have to deal with it so that’s unfortunate after paying $20 second of all it is a solid mass so you have to put it in your hands and kind of warm it up for it to become any sort of an oil and I wouldn’t even consider it an oil at that it’s more of like a cream once you warm it up in your hands, but it doesn’t make your hair greasy. I use a small amount I would think that the jar would last a long time given that you don’t need a lot to get through to your scalp unfortunately, with my jar being cracked, I don’t know how that’s gonna affect the longevity of the product And it does have a smell think of burnt coffee beans that will dissipate after about an hour to an hour and a half after putting it on, but if you’re not putting it on, I’m just going to bed. It might be become an issue. I’m gonna wait it out. I hope I do see results from doing this but again so far nothing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2025
M
Verified Purchase
megan moyes
Lowell, US
★★★★★ 5
Wonderful product
Scent: Smoky coffee, Size: 4 Fl Oz (Pack of 1)
I used this on a bald spot I had and it worked extremely well. Consistency is key though it needs to be used every day
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
M
Verified Purchase
MYREEN
West Palm Beach, US
★★★★★ 5
It works and I love it!
Scent: Smoky coffee, Size: 4 Fl Oz (Pack of 1)
I love this product.. been using it for a few months now. My hair is more manageable and my thinning crown looks and feels fuller. The smoky smell, am not bothered because it disappears after a few minutes. I use it twice a week, massage very little amount on scalp and hair, then the next day wash it off with shampoo. I used to need to dye my gray every 3 to 4 months when some appear. Now, it's been 4 months since my last visit to the salon. I noticed my hair has darken a bit. I can delay my salon visit for another month unless I need a haircut!! Yehey!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 19, 2025

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