You are about to set up an account. For this process, you will be asked to provide personal information about yourself and possibly your organization. We invite you to read our Privacy Policy concerning any use of this information that you provide to us.

Benefits of setting up an Account:
  • Allows personalized content such as Favorite Items to be viewed.
  • Conveniently stores information to be used at checkout, such as billing and shipping addresses (Payment information is never stored on the website).
  • Get customized pricing for your organization (when available).

Join Our Mailing List!

Preferred Email Format

* Required

Advanced Search

Rapid Digestors

By Labconco
Rapid Digestors


Available in 4- or 25-place models, the Rapid Digestors were developed in a working laboratory environment following extensive interviews with Kjeldahl users. Only Labconco’s Rapid Digestors provide an individual ceramic heater module for each tube to provide efficient, uniform heat transfer. Unlike aluminum block designs, the ceramic modules have virtually the same coefficient of heat expansion as the digestion tube. This means more rapid destruction of organic material resulting in faster digestions. Digestion time is normally 45 minutes depending on the sample type and catalyst. Each ceramic heater is insulated on all four sides as well as the bottom. This prevents heat loss and assures low energy consumption while maintaining reduced external housing temperatures.

Rapid Digestor-4 and Rapid Digestor-25 both provide rapid digestions for nitrogen determination of 1 to 4 or 25 (depending on model) samples up to 2 grams using 250mL tubes. Both models are constructed of individual ceramic heaters surrounded by 1" thick insulation board housed in chemically-etched aluminum casing. The Rapid Digestor-4 has 4 heaters, while the Rapid Digestor-25 has 25 along with two fold-down handles on the casing. A heater element is encapsulated in each heater module. An RTD platinum temperature sensor (5 sensors are in the Rapid Digestor-25) is encased in the ceramic and sends signals to the controller. Capable of reaching 410°C in less than one hour. Separate controller has power switch and a solid-state, stepless temperature control knob, factory calibrated from ambient to 450°C, with triac control of ±0.5% over entire operating range. Features a 6-foot electrical cord with plug and electrical lines to connect the digestor to the controller. The Rapid Digestor-25 also has a 7-foot electrical line (electrical plug is required). Includes carrier rack made of aluminum alloy with two plastic handles and two removable heat shields.

Requires 250mL digestion tubes and fume removal system (not included). Operation inside a fume hood is strongly recommended. The RapidStill II provides the ideal companion for the Rapid Digestors.


Cat.No.ModelElectricalEA Certified
1195-2301200 Rapid Digestor-25 208/230V, 50/60Hz, 16A $12895.00
Add To Favorites
1195-2308000 Rapid Digestor-4 115V, 50/60Hz, 7A $5820.00
Add To Favorites
1195-2304025 Straight Digestion Tubes, pack of 25   $1305.00
Add To Favorites
1195-2304005 Straight Digestion Tubes, pack of 5   $265.00
Add To Favorites
1195-2303005 Volumetric Digestion Tubes, pack of 25   $310.00
Add To Favorites
1195-2303025 Volumetric Digestion Tubes, pack of 5   $1405.00
Add To Favorites
1195-2350025 25-Place Fume Removal System   $5175.00
Add To Favorites
1195-2354000 4-Place Fume Removal System   $1375.00
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