SKU: 95906590564

Ohaus ST20R ORP Pen Meter

Sale price$130.96 Regular price$145.51
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  • CAN

Ships within 48 hours · Estimated delivery Aug 31 - Sep 5

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Description

Ohaus ST20R ORP Pen MeterOhaus ST20R ORP Pen Meter with Temperature Display Starter pen meters provide what should be expected of a small pen meter: simple, fast, straightforward, no frills yet highly accurate operation time and time again. They are the economical option when you are looking for accurate measurements with no restrictions. With durable plastic housing, a protective cap that safeguards the sensor, and an automatic shutdown feature to preserve battery life, the

Ohaus ST20R ORP Pen Meter with Temperature Display

Starter pen meters provide what should be expected of a small pen meter:  simple, fast, straightforward, no-frills yet highly accurate operation time and time again.  They are the economical option when you are looking for accurate measurements with no restrictions.

With durable plastic housing, a protective cap that safeguards the sensor, and an automatic shutdown feature to preserve battery life, the Starter pen meters can endure consistent use in rugged environments.

Equipped with a wrist strap that helps to prevent unintentional dropping, Starter pen meters are constructed with an IP67 waterproof design that can prevent water damage when accidentally dropped into liquid.

The meter provides almost instantaneous results and offers the ability to hold the reading right on the display to provide additional time for data logging.

Specifications:

  • Meter Type: ORP
  • Measurement Range: -1000 – 1000 mV;  0.0 – 99.0 °C
  • Accuracy ±: 2 mV / 0.5 °C
  • Measurement Resolution: 1 mV
  • Display: LCD
  • ATC: Yes
  • Temperature Compensation: Automatic
  • Automatic Shutdown: Yes, after 6 minutes of non-use
  • Battery Life: 200 hours with disposable batteries
  • Calibration: Not applicable
  • Dimensions: 5 in x 7.28 in x 1.77 in (38 mm x 185 mm x 45 mm) (LxHxW)
  • Net Weight: 88 oz (110 g)
  • Number of Buttons: 2
  • Power: 4 AG13 batteries (included)
  • Protection Rating: IP67
  • Temperature Display: Yes
  • Temperature Sensor: 50 KΩ NTC
  • Working Environment: 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85% RH, non-condensing)
  • Wrist Strap: Yes

Starter Pen Meters Data Sheet
ST20R 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: 95906590564

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Yessenia melende.
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Reviewed in the United States on December 12, 2025
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Joyelle Augenstein
Dallas, US
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Comfortable easy
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Reviewed in the United States on January 2, 2026
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TheFaceLadyG
Massapequa, US
★★★★★ 5
Really Nice Hydrating Toner Pads
Scent: Collagen, Scent: Collagen
At 52, post-menopausal, with dry and increasingly sensitive skin, I’m very selective about toner pads. Many of them either feel too thin and ineffective or too active and irritating. These landed right in the middle in the best possible way — gentle, hydrating, and very easy to use. The first thing I noticed is how well these pads are saturated. They’re not dripping, but they hold enough product to comfortably treat the entire face. The gel texture also makes them feel a little more substantial than typical toner pads, which I really like. They feel cooling and comfortable on the skin. What I notice most after using them is how hydrated and slightly plumped my skin looks. This isn’t dramatic or instant, but it’s the kind of improvement that makes your skin look healthier and more comfortable. My skin feels smoother and softer, and it layers very well with the rest of my routine. They also feel very lightweight. There’s no sticky or heavy residue, and once the essence absorbs, my skin just feels hydrated and calm. I can easily follow with serums and moisturizer without any pilling. I also appreciate that these pads are gentle and very skin-compatible. I’ve had no irritation, redness, or sensitivity, even on days when my skin is feeling more reactive. At this stage, that matters more than aggressive results. In terms of moisture, these do a really nice job. My skin feels comfortable after using them, and they work well as a prep step before the rest of my routine. On some mornings, they even give enough hydration that I don’t feel rushed to apply moisturizer immediately. Fragrance is also worth mentioning. The scent is very light and subtle, and it doesn’t linger. I’m careful about fragrance, and these didn’t cause any sensitivity or irritation. Another thing I like is how easy they are to use. They’re quick, convenient, and a nice step when I want hydration without adding another liquid toner. Overall, these feel like a supportive, hydrating step that helps improve overall skin quality over time. They’re gentle, comfortable, and easy to incorporate into a daily routine.
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Reviewed in the United States on April 12, 2026
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Mom who does everything
Port Orchard, US
★★★★★ 5
Love These Toner Pads
Scent: Collagen
I’ve really been enjoying these Biodance Collagen Gel Toner Pads! They feel super refreshing on the skin and are an easy step to add into my routine. The pads are well-soaked without being messy, and they glide on smoothly. After using them consistently, my skin feels more hydrated and looks a bit more plump and smooth. I’ve also noticed my pores appear slightly minimized, especially around my T-zone. They’re gentle enough for daily use and don’t irritate my skin. Overall, a great option if you’re looking for a simple way to boost hydration and improve your skin’s overall look and feel!
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Reviewed in the United States on May 5, 2026
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R. Barnes
Houston, US
★★★★★ 5
Finally!!
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I have had huge pores with combination oily skin and dry skin since reaching my mid 30’s and makeup made them more prominent. Since adding these to my morning routine my makeup stays smooth with my pores minimized and skin looking and feeling healthier. After trying multiple products I finally found THE ONE.
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