
Overview
The Prepmaster 5100 is a fully automated system that uses advanced robotics and liquid handling to prepare biological specimens for TEM and SEM. It reliably accomplishes your repetitive tasks, increasing consistency in specimen preparation and giving you confidence in your results compared to manual processing.
Benefits
- Easy to set up and clean up
- Versatile — can process most biological samples.
- Prepare up to 8 kidney specimens in less than 1 hour.
- Excellent choice to run Ellisman rOTO protocol for vEM specimen prep.
- Up to 24 unique reagents or rinses.
- Reliable unattended overnight operation.
- High quality, consistent processing.
Featured Publication:
Preparation of Cells & Tissue for Clinical Diagnostics TEM: Delivering Consistent Results, Time Savings, & Cost-Effectiveness Using the Prepmaster™ 5100 EM Specimen Prep Robot
Read the Journal Article

Precision meets efficiency with 1-2-3 ease
1. Load Reagents
Add sealed reservoir with freshly prepared osmium tetroxide and other hazardous reagents. Buffer, water, and ethanol are stored in bulk reservoirs and daily.
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2. Load Specimen
Transfer biological specimens to the sample processing plate. Set plate on sample dock.
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3. Select Protocol & Press Start
Select your preprogrammed protocol and press Start Run. Then walk away. The Prepmaster will alert you when it's finished running.
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The Prepmaster 5100 computer controller comes pre-loaded with example protocols for standard tissue preparation that can be run or easily modified or written from scratch to match your existing protocols. For example, protocols for kidney tissue prep with and without en-bloc UA staining can be easily created, modified, and stored.
Prepmaster Advantages
Cost-effective for lab budgets
- Uses standard labware; No proprietary, expensive consumables required.
- Up to 90% less reagent use saves purchase, shipping and disposal cost.
- Unattended operation frees time to work on other projects for greater lab productivity
Requires much less effort
- A typical kidney preparation manual protocol takes 4 hours of hands-on time.
- A Prepmaster run takes <5 minutes to load and start and <1 minute to remove the specimens and proceed to the next step resulting in a 75% decrease in total time and 97% decrease in hands-on time effort.
Error reduction
- Labs report up to 50% specimen processing failure rate due to loss or mishandling. A conservative estimate is a 10% loss. Many labs process 2-3 identical specimens to make sure they get at least one good one.
- The Prepmaster eliminates pipetting error and never selects the wrong reagent bottle, so decreases the possibility of pipetting error or reagent mis-handing to zero, decreasing the error rate to zero from 50% in some cases and a minimum 10% in most cases.
Heated Agitation Station
For accelerated, enhanced tissue preparation.
Because penetration of osmium tetroxide or other post-fixatives into biological specimens can be slow and may result in uneven fixation, gentle agitation promotes uniform post-staining. The Prepmaster's heated (RT–60°C) Agitation Station ensures that the osmium tetroxide/fixative saturates the specimen evenly, allowing for more uniform and reliable fixation. Agitation increases contact between the fixative and the tissue, which enhances the fixation process and reduces overall fixation time. Heating the specimen often creates conditions optimal to the post-staining process by improving penetration of fixatives and stains, leading to more uniform results with enhanced contrast in imaging and reduced time.
Thermally-Controlled Reagent Reservoir
For temperature regulation of samples and reagents.
With 12 cooled or heated (5ºC - 70ºC) reagent reservoirs, the Prepmaster 5100 enables researchers to optimize staining protocols by controlling the temperature of up to 12 reagents each. Thermal control helps maintain the integrity of the specimens leading to pristine ultrastructure. Often protocols require specimens to be incubated at low temperatures to enhance dehydration, and also require high temperatures in other steps to create conditions critical to the post-staining process. Heating a sample can induce penetration of fixatives and stains, leading to more uniform results, enhanced contrast in imaging, and reduced time. Cooling a specimen can minimize swelling or shrinking. The Prepmaster provides temperature regulation over both samples and reagents for complete control and optimization.
Computer Controller
The Prepmaster 5100 computer controller comes pre-loaded with example protocols for standard tissue preparation (e.g., kidney) that can be run or easily modified to match your validated protocols. For example, protocols for kidney tissue prep with and without en-bloc UA staining can be easily created, modified, and stored.
Protocol development and protocol execution permissions are designed to enable 100% confidence in validated protocol use compliance. The Protocol Developer is responsible for methods performance, robustness, and validation. Protocol execution is limited to selecting the method and starting the run to ensure consistency.
Connectivity
The Prepmaster 5100 is a smart robot with all the advantages of internet connectivity. Remote technical support is available, including remote monitoring and control for real-time online assistance with methods development and troubleshooting.
Applications
The versatile Prepmaster 5100 offers a wide range of applications for TEM, SEM, and LM including preperation of tissue/biopsies (1x1x1mm), cell pellets, cells seeded-on-coverslips, organoids, retinas, and other biological samples.
Specifications
Dimensions (W x D x H) |
63 x 57 x 66 cm (25 x 22.5 x 26 in.) |
Weight |
48kg (105.8 lb.) |
Frame Composition |
Rigid steel and CNC aluminum |
Operating Environment |
Temperature: Recommended 20-24 °C Relative Humidity: Recommended 40-60% |
Power Requirements |
Robot Power Input: 36 VDC, 6.1 A Power Adapter Input: 100-240 VAC, 50/60 Hz, 4.0 A/115 VAC, 2.0 A/230 VAC |
Connectivity |
WiFi 2.4 GHz IEEE 802.11b/g/n, USB 2.0 |
Certifications |
CE, FCC, NRTL, CB, ISO 9001 |

Prepmaster™ and Agitation Station™ are trademarks of Heartland Biotech™.