Advanced Search

Ohaus® Starter 3100M Multi-Parameter Bench Meters

By Ohaus

Ohaus has gone beyond weighing!

View the NEW full line of equipment


Ohaus® Starter 3100M Multi-Parameter Bench Meters

Save time, space and money with the Starter 3100M Bench Meter, which combines all your pH, ORP, conductivity, TDS, salinity, resistivity, and temperature measurements—in one smart device. Ideal for a wide range of lab applications, the ST3100M is incredibly easy to use. Equipped with software to ensure the reliability of your readings, and RS232 connectivity to store and transfer data conveniently, the ST3100M is a great addition to your lab.

  • Equipped with Software to Ensure the Reliability and Accuracy of Your Readings: Auto temperature compensation, auto buffer recognition, six pH buffer groups, five conductivity standards and automatic/manual endpoints ensure accurate and stable measurement.
  • User-Friendly Features Offer Ease of Operation and Versatility: An adjustable electrode holder, a large backlit LCD for optimal viewing of results, and a Quick Guide with set-up and navigation info combine to make ST3100M a truly userfriendly experience.
  • Store and Transfer Data Conveniently with RS232 Connectivity: Documenting data is made efficient with a 99-item memory for pH and conductivity measurements. RS232 interface allows you to connect to an external device such as a printer to store or transfer data.

The Starter 3100M is available in three configurations.


pH Measurement Range -2.00 to 20.00 pH
Resolution -2000 to +2000 mV
Accuracy ± 0.01 pH
Calibration 3 point, 6 buffer groups for pH
Temp. Compensation Automatic or manual/0°C to 100°C for pH
Input BNC, impedance >l0e+12 Ω
Conductivity Measurement Range 0.01µS/cm to 199.9 mS/cm
Resolution 0.01µS/cm auto-range
Accuracy ± 0.5% full-scale reading
Calibration 5 pre-defined conductivity standard points
Temp. Compensation Automatic or manual/0°C to 100°C for pH
Input Mini-DIN
Temp. Coefficient Range 0.00 %/°C to 10.00 %/°C
Reference Temp. 20 or 25°C
Temperature Measurement Range -5°C to 110°C
Resolution 0.1°C
Accuracy ± 0.3°C
Input Cinch, NTC 30 kΩ
TDS Measurement Range 0.1mg/1 to 199.9 g/1 (rDS)
Resolution 0.01 mg/L auto-range
Salinity Measurement Range 0 to 100 psu
Resolution 0.01 psu
Resistivity Measurement Range 0-20MΩ•cm (resistivity)
Resolution 0.01 Ω•cm auto-range
Memory 99 sets of pH and conductivity data, last calibration data
Power/Battery 110-240V / 50Hz,12 VDC
Size (W x D x H) 220 x 175 x 78 mm (approx.)/0.95 kg
Display LCD with backlight
Communication RS232 (included), USB (not included)

Cat.No. Brand Name EA   Certified
316-30276082 Ohaus® ST3100M-B: ST3100M bench meter, stand-alone electrode holder, in-use-cover $815.00
Add To Favorites
316-30276083 Ohaus® ST3100M-F: ST3100M-B content; ST310, STCON3, pH powder sachet set, 1413 uS/cm and 12.88 mS/cm solution (20mL bottle) $711.33
Add To Favorites
316-30332140 Ohaus® ST3100M-N: ST3100M-B content; ST230, STTEMP30, STCON3, pH powder sachet set, 1413 uS/cm and 12.88 mS/cm solution (20mLbottle) $711.33
Add To Favorites

The following items have been added to your cart:

Choose a favorite list for this item:

Catalog Number Description Price

Request Literature

Please fill out the form below if you want to request literature from Krackeler Scientific.


Quick Order

* Required

New Year Price Updates

We are currently working diligently to update our website pricing information for the New Year. If you place an order, you will be acknowledged with any corrected pricing. If you'd like the most current information sooner, please don't hesitate to drop us an email or give us a call and we'd be happy to assist. Thank you for your patience while we are updating.


Play Video

To Request a Quote

  1. Search or Browse for items and add to them to your Shopping Cart.
  2. Click the "Request Quote" button at the bottom of the Shopping Cart page.
  3. Fill out required fields.
  4. Optionally you can convert to standard checkout mode by choosing a payment type.
  5. Click "Request Quote" at the bottom of the page.

You will be contacted with a quote.

To Order From a Quote

  1. Register and login to the website.
  2. Receive a quote from your sales representative or customer service.
  3. Have your copy of the quote in hand.
  4. Visit our quote module to search for your quote.
Back to Top