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We apologize this Instrument is currently | |
Please submit a request, we will notify you if another one comes in stock. Thank you! | |
![]() | Approved Vendor to many US, Canada, and EU Universities |
![]() | US & International Shipping |
- Stock: SOLD
- Brand: Sartorius Stedim
- Product Code: 58542
- Condition: Pre-Owned
For Sartorius Stedim Biostat B (B2) Dual Control Bioreactor for Microbial Cultures with 2 Liter Autoclavable Vessels
This item has been recently sold. Please view the other available instruments on your right.
If you do not see what you need, let us know via the “Request Quote” form; we often replenish sold-out items.
- Fully Functional
- Serviced & in Stock
- Current Model
- Good cosmetic condition
- Technical sales consultation available
- CONTINENTAL US 120 DAYS WARRANTY & 60 DAYS INTERNATIONAL
- Includes remote instrument setup and training session
We have sold equipment to many Fortune 500 companies, small/midsize businesses and Academia globally
Below is how we ensure a smooth transaction:
- We price bioreactors very competitively, reflecting the extensive technical hours each one receives
- We respond quickly and offer knowledgeable technical consultations via e-mail/phone/Zoom
- We thoroughly verify products we sell, offering operational videos and detailed testing information
- Most bioreactors receive between 20 and 60 hours of technician time, ensuring their proper operation
- We are well-versed in global logistics, having safely shipped bioreactors to the UK and the EU
- We offer professional post-sale technical support, resulting in virtually no returns in 2024 & 2025.
Here is what you will receive:
- (1x) Sartorius Biostat B (B2) dual control tower for 2 vessels
- (2x) Direct drive agitation motors with attached cables
- (2x) 2-liter univessel reactor vessels
- (2x) exhaust condensers
- (2x) pH sensors with cable
- (2x) DO sensors with cable
- (2x) Temp sensor with cable
- (1x) Power cord
Kindly take note: Tubing and other consumables are not included. Inquire with us about any accessories or components you would like to have added.
Biostat B2 Bioprocess System Configuration:
- Aeration Module with 2 solenoid valves: 2-gas mixing with sparger outlet
- Flow meters: 2
- Accuracy ±5% full scale
- Flow Rates:
- - 02: up to 3 lpm
- - Air: up to 3 lpm
- Vessel Type: Univessel Glass, Jacketed
- Working volume: 0.6-2l for 2l vessel
- Vessel 1 – 2 x 3-blade segment (marine) impellers
- Vessel 2 – 3 x 6-blade segment (Rushton) impellers (+ microsparger)
- Drive unit: 200 W motor for 1L–10L Vessel
- Stirrer shaft coupling: direct coupling
- Agitation range with direct drive: 20-2000 rpm for 2L vessel
- 6 Watson Marlow 114, fixed speed (on|off controlled) integrated pumps for pH control (acid | base) and foam
- Pumps as labeled: AFOAM-1, AFOAM-2, ACID-1, ACID-2, (5 rpm); BASE-1, BASE-2 (44 rpm)
Customization/Options:
- A chiller can be added if required for your process. (Please inquire with us.)
- Other impeller options may be available. (Please inquire with us for available inventory.)
Testing performed by our in-house service team:
The Biostat B2 Bioprocess System passed all tests and was found to be fully functional:
- We tested the power to the system.
- We tested the operation of the touchscreen display.
- We checked the operation of all peristaltic pumps.
- We verified the functionality of agitation motors.
- We verified the accuracy of temperature probes.
- We tested the accuracy of DO sensors using our calibration solution.
- We confirmed the proper operation of the heating jackets.
- We tested the functionality of gas-mixing components.
- We confirmed the function of the cooling water distribution components.
Instrument Overview:
- Twin-station design enables efficient side-by-side microbial culture development and optimization.
- The built-in solenoid valves with flow meters provide consistent gas delivery for standard microbial applications.
- Configurable with Rushton impellers for high oxygen transfer or marine impellers for gentler mixing.
- Powerful 200 W direct-drive motor delivers 20–2000 rpm for flexible and consistent agitation.
- Integrated Watson Marlow 114 pumps ensure dependable pH and foam control across both vessels.
- Sartorius Biostat B2 offers a user-friendly platform for scalable microbial bioprocessing.
Instrument Application:
- Microbial fermentation process development
- Batch and fed-batch culture optimization
- Scale-up studies for industrial bioprocesses
- Parallel testing of culture conditions
The Key Features:
- Twin independent control for parallel runs
- 2L glass vessels with 0.6–2L working volume
- 20–2000 rpm direct-drive agitation motor
- 2-gas mixing with precise flow control
- Marine or Rushton impeller options
- Six integrated Watson Marlow pumps
Additional technical info:
Video Overview:
About us

How we pack

VIEW SOME OF THE CUSTOMERS WE HELPED HERE
Why do so many customers choose to order from us?

- We have experience servicing and repairing these instruments.
- This instrument goes through all the described service steps before shipping. see the questions section below
- We offer detailed photos and videos of the instruments you buy.
- We are an approved pre-owned equipment vendor to many large US, Canadian, and EU Universities.
- We are an approved pre-owned equipment vendor to many Fortune 500 US and International Biopharma companies.
- Technical sales consultation available
- Remote installation and instrument operation training may be available.
- On-site installation may be available in the Boston Area (New England area)
- US or International shipping is no problem (see the shipping tab on how we pack and feel at ease)

- Warranty
- You get after-sales technical support
- Customer references are available
- The instrument will be fully functional!
- Smooth process from the initial quote to order fulfillment
This will ship via freight. Please contact us with your zip code to obtain a shipping quote.
COMMON QUESTIONS AND ANSWERS BELOW
What are the steps you take to verify, service, and confirm the functionality of the Biostat B2 Bioprocess System?
We verify various instrument functions individually and together, performing necessary repairs or maintenance to bring the instrument to our quality standards..
- We tested the power to the system.
- We tested the operation of the touchscreen display.
- We checked the operation of all peristaltic pumps.
- We verified the functionality of agitation motors.
- We verified the accuracy of temperature probes.
- We tested the accuracy of DO sensors using our calibration solution.
- We confirmed the proper operation of the heating jackets.
- We tested the functionality of gas-mixing components.
- We confirmed the function of the cooling water distribution components.
Can I view the Biostat B2 Bioprocess System in person at your facility or do a live Zoom demo before it is shipped to me?
We invite you to visit our facility for an on-site demo or feel free to request a virtual Zoom demo of the instrument you are interested in.
What about the warranty? Installation, training, maintenance?
Warranty Terms:
- The instrument comes fully warranted for both parts and labor.
- The customer should retain all packing materials during the warranty period.
What should I watch out for when buying a Biostat B2 Bioprocess System used/pre-owned from another lab?
- Make sure the instrument is properly packed for shipping and will arrive safely. If the instrument is large, request to have it packed in a wooden crate.
- Confirm that there is no physical damage or any misaligned internal components.
- Ask what accessories are included.
- Ask how long the warranty is and what it covers.
Here is what our technical team tests so you can request something similar and ensure your instrument will be fully functional.
- We tested the power to the system.
- We tested the operation of the touchscreen display.
- We checked the operation of all peristaltic pumps.
- We verified the functionality of agitation motors.
- We verified the accuracy of temperature probes.
- We tested the accuracy of DO sensors using our calibration solution.
- We confirmed the proper operation of the heating jackets.
- We tested the functionality of gas-mixing components.
- We confirmed the function of the cooling water distribution components.
We recommend inspecting the instrument in person or requesting a virtual demo; this will allow you to evaluate the condition and performance of the instrument you are considering purchasing.
Do you have a Biostat B2 Bioprocess System on hand?
- This is a common model, and we generally stock multiple instruments, accessories, and many replacement parts to back up our warranty.
I found it elsewhere for less. What goes into your price?
We acknowledge that sometimes you can purchase this model instrument elsewhere, possibly for less.
Here are some of the reasons for our price.
- We may offer longer warranty terms.
- We cover shipping costs during the warranty period. (Customer is required to save packing materials for the duration).
- We have to have technical staff that can do the testing/repairs and after-sales support if there are any issues.
- We invest considerable time into the testing and service of each instrument we sell.
- We have to purchase various testing supplies (often expensive) to perform testing.
- We have to purchase any missing required accessories to make the instruments complete.
- We have to procure and stock service parts to support our warranty.
- We have extensive experience packing sensitive instruments. See the shipping section in the website menu for info on how not to pack.
- We guarantee that the instrument will be functional.
This procurement is for a University or College. Are purchase orders with NET terms accepted?
- If you are a US or Canadian customer, we are likely already a registered vendor in your University's vendor system. This would greatly expedite the process of PO approvals and get this instrument into your lab faster.
- POs are accepted from US and Canadian universities.
How fast will you ship?
- We can ship within a few days to two weeks. Shipping time depends on the current demand for our instruments. Members of our sales team will be able to offer current delivery estimates.
Will my instrument be insured during shipping?
- All instruments shipped within the USA and internationally are fully insured. This applies as long as we are the shipper and handle shipping arrangements.
- If the buyer handles shipping, then shipping insurance responsibility falls to the buyer; we highly advise that the buyer obtain shipping insurance from their carrier.
How do you pack? Have you packed and shipped Biostat B2 Bioprocess System Instruments in the past? Do you ship Internationally?
Packing
- Most larger instruments ship in fully enclosed ISPM15-certified wooden crates with proper padding underneath, and the sides have moving components braced.
- Accessories are packed safely in boxes with padding and then safely packed inside the crate.
- We may not use a crate for local deliveries to save you money *if delivered by us.
- We often use “tilt’ & “shock” indicators on the crates to ensure the crate has not been excessively tilted and dropped where equipment may suffer damage.
- Photos are taken during the packing process to make sure nothing is missed.
USA/Canada Shipping
- Within the US and Canada, we will ship via selected freight carriers. We do not use low-price/high-damage carriers as we want the equipment to get safely to you.
International Shipping
- Internationally, we will only ship via Air Freight or Air Parcel (such as UPS or DHL), which provides reliability, no exposure to Ocean weather, and timely delivery.
We have extensive experience packing and shipping fragile instruments globally.
Our experience and process
- We have safely packed and shipped thousands of sensitive analytical instruments.
How much will I save buying it pre-owned, and is it worth it?
A lot…and it is undoubtedly worth it, and here is why. Feel free to ask for feedback from hundreds of customers who bought from us.
- You will pay less than half vs. buying a new instrument. Why not spend leftover funds on another instrument for your lab?
- You will get our standard warranty, plus, when available, an option to obtain an extended warranty agreement.
- Know that your instrument was tested and working the day it left our facility and is covered if there are faults.
- Get extra peace of mind by adding an extended warranty or service agreement when such an option is available.
Sustainability
- Well, this one is easy: buying a pre-owned instrument is great for the planet; you are reducing unnecessary waste, CO2 output, and water use that would be used during the manufacturing process.
I have more questions; I want to receive a formal quote.
Absolutely! Please give us a call (1-617-397-3486) or complete this form to get your questions answered or receive a formal Quote.

