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SER 158 Series Automatic Solvent Extractor

Fully automatic and cloud-enabled extractors, available in 3 and 6 positions that guarantee security, accuracy and precision in the determination of extractable matter according to Randall and Twisselmann.
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SER 158/3S303A0390
SER 158/6S303A0380
SER 158/3 without ControlPadF303A0390
SER 158/6 without ControlPadF303A0380

Fast and accurate solid-liquid extraction

Fast and accurate solid-liquid extraction

The SER 158 Series automatic solvent extractors in 3 and 6 positions are the accurate and precise solution for quantitative and qualitative extractable matter determination according to Randall method, analyzing up to 5 times faster than traditional Soxhlet

The solid-liquid extraction process removes the soluble components from solids using a liquid solvent in 5 steps. The SER 158 works in accordance with international standards such as AOAC, ISO, EPA, APHA, UNI.

Safe and powerful heating combined with advanced software and security processes guarantee reproducible extraction processes.

SER 158 is fully automated to maximize productivity and free operator time. Just Load&Go! 

Unparalleled versatility and scalability

Unparalleled versatility and scalability

The SER 158 Series can work with all sample types and sizez thanks to its unparalleled versatility and wide range of accessories and consumables:

  • Butyl, viton and the exclusive vaflon seals ensure compatibility with the majority of solvents and solvent mixtures
  • 3 different sizes of cups, thimble holders and thimble allow to extract minimum quantities and minimize solvent consumption
  • Cellulose and glass fiber thimbles for quantitative and qualitative analysis respectively
  • Compatibility with HU6 glass crucible avoiding sample loss due to transfer. 
The SER 158 is a universal solvent extractor and combining up to 4 units enables you to perform multiple applications independently and simultaneously. 

Smart and easy to use

Smart and easy to use

The exclusive 7" ControlPadTM of the SER 158 has an intuitive User Interface that facilitates the set-up and interaction with the analyzer. 

The SER 158 is designed to work unattended 24/7 with Load&Go technologies, minimizing necessary operator intervention. Integrated yet removable, the ControlPadTM can be connected with a balance and barcode reader for maximum automation and traceability.

Choose from the pre-installed methods, create new ones and mark your favorites for a fast start-up. Each extraction step is visualized on the ControlPadTM along with a great set of information and options.

Results are immediately calculated and stored on the on-board memory. Three USB ports are available along with an Ethernet connection for data transfer to external devices.

Minimum exposure to solvents

Minimum exposure to solvents

The SER 158 safe SolventXpress™ technology allows smart solvent dispensing for solvent addition guaranteeing minimum exposure to solvents and ensuring operator safety.

The condensed solvent at the end of the analysis is collected in the cooled recovery tank in the back of the instrument and the solvent output is completely automatic with one click on the ControlPadTM
The SER 158 is hermetically sealed and the protective transparent cover preserves from spills and hot solvents.  Advanced sensors constantly monitor the extraction process and ensure a safe analysis during all the steps.

SafeEnd™ technology of the SER 158 prevents extracted matter burnings automatically raising the cups after the removing step. 


Premium materials for cost-effective extractions

Premium materials for cost-effective extractions

VELP patent-pending titanium condensers guarantee the unparalleled solvent recovery of more than 90% that is collected in the cooled recovery tank. 

For the majority of fat extraction applications, the recovered solvent can be reused cutting down operating costs. 

Cost reduction is obtained by minimal cooling water consumption ( starting from 1l/min) and the independent heaters switch on/off. 

Compact design to save space in your lab

Compact design to save space in your lab

The SER 158 compact design saves precious space in your lab and especially under the fume hood! 

The SER 158 is the best in its category in terms of space savings thanks to VELP engineering and the completely automatic analysis step and solvent management. 

Cloud technology to raise the bar of automation

Cloud technology to raise the bar of automation

The SER 158 is designed to work automatically and unattended and with the connectivity option to VELP Ermes cloud platform, you will be able to monitor and control your analyses from a virtual cockpit wherever you are, anytime you need to avoiding routine instrument check and download of data. 

VELP Ermes is available for PC, smartphone and tablet. 

  • Real-time monitoring and notification 
  • Maximum security and data protection
  • Enhanced Service Support (VELP and partners)
  • Immediate Software Updates
  • Create and share reports, track trend and get useful insights

TEMS™ Technology

TEMS™ TechnologySave Time, Energy, Money and Space


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A wide range of accessories and consumables

A wide range of accessories and consumables

The SER 158 automatic solvent extractor is equipped with a wide range of accessories designed to make its daily use as easy as possible and guarantee a high versatility of use.

Choose your preferred size of glasses and thimbles as well as gaskets made of high-quality materials that can be adapted to any application, as in the case of the high-quality Vaflon, which is suitable for a very wide range of solvents.

In addition to the standard accessories, the SER 158 extractor has several optional accessories to satisfy every need and guarantee the execution of the analysis in maximum safety.
Adapter USB-RS232
cod. A00000195
Barcode scanner with USB socket
cod. A00000364
Boiling stones, 30g
cod. A00000305
Cellulose thimbles 40x80mm, 25pcs/box
cod. A00000296
Cellulose thimbles 25x80mm, 25pcs/box
cod. A00000294
Cellulose thimbles 33x80mm, 25pcs/box
cod. A00000295
Complete Glass bottle solvent collection
cod. A00000301
Crucible holder HU6 for SER 158
cod. A00000293
Extension lead 2m for ControlPad
cod. A00000315
Extraction cup L Ø 65x120mm 3pcs/box
cod. A00000302
Extraction cup S Ø 48x120mm 3pcs/box
cod. A00000303
Extraction cup STD aluminium 3pcs/box
cod. A00000361
Extraction cup STD Ø 56x120mm 3pcs/box
cod. A00000290
Extraction thimbles holder Ø25 mm
cod. A00000291
Extraction thimbles holder Ø33 mm
cod. A00000312
Extraction thimbles holder Ø40 mm
cod. A00000292
Glass fiber thimbles 25x80mm, 25pcs/box
cod. A00000314
Glass fiber thimbles 33x80mm, 25pcs/box
cod. A00000313
Glass fiber thimbles 40x80mm, 25pcs/box
cod. A00000393
Green viton seal SER158, 3pcs/box
cod. A00000297
Grey butyl seal SER158, 3pcs/box
cod. A00000298
Handling device extraction cups SER158/6
cod. A00000304
Inlet Connection 1/4NPT-tube Ø4,8÷5mm
cod. A00000300
Inlet Connection1/4 NPT-tubeØ 4,3÷4,5mm
cod. A00000299
IQ/OQ SER158 Manual
cod. A00000306
Oat meal, 30g
cod. A00000318
PM Kit Full SER158
cod. 40002953
PM Kit Regular SER158
cod. 40002952
Slave connection cable SER158
cod. A00000287
Thimble weighing cup SER158 and 148
cod. A00000310
Thimbles stand 6 places SER158
cod. A00000311
VELP Ermes 1 year Connection
cod. E00010012
VELP Ermes 3 years Connection
cod. E00010036
Waterproof mouse
cod. A00000215
White vaflon seal SER158, 3pcs/box
cod. A00000288
Wireless barcode scanner
cod. A00000365


Positions: SER 158/3 3-positions
SER 158/6 6-positions
Max. Capacity: SER 158/3 21 samples/day/unit
SER 158/6 42 samples/day/unit
Scalability: SER 158/3 12-pos. (up to 4 units)
SER 158/6 24-pos. (up to 4 units)
Display: 7” color touch screen - extractable ControlPad
Accepted Solvents: Capable of being used with the majority of solvents
Solvent Recovery: > 90%
Measurement Range: 0.1-100%
Reproducibility (RSD): ≤ 1%
Automation: Immersion, Removing, Washing, Recovery, Cooling
Lighting: LED lights show active positions
Heating Element: Glass ceramic – positions independent switch on/off
Sample Size: 0.5 to 15 g in 33x80 mm thimbles (generally 2-3 g)
Seals: Viton, Butyl, and Vaflon
Condensers: Titanium (VELP Patent Pending)
Connectivity: Cloud via LAN
Interfaces: 3 x USB (balance, mouse, USB stick), Ethernet (Pc)
Result Calculation: Automatic, Archived on ControlPad
Water Consumption: from 1.0 l/min
Dimensions (WxHxD): SER 158/3 358x546x450 mm - 14x21,5x17,7 inch
SER 158/6 546x546x450 mm - 21,5x21,5x17,7 inch 
Dimensions with ControlPad: SER 158/3 358x546x570 mm - 14x21,5x22,4 inch
SER 158/6 546x546x570 mm - 21,5x21,5x22,4 inch
Weight (SER 158/ControlPad): SER 158/3 Kg 29 / 1 - 64 / 2,2 lb
SER 158/6 Kg 36 / 1 - 80,3 / 2,2 lb  
Power Supply: SER 158/3 115/230 – 50/60 V-Hz 
SER 158/6 115/230 – 50/60 V-Hz 
Power Consumption: SER 158/3 630/850 W 
SER 158/6 630/850 W 

Brochures & Leaflets

VELP Scientifica invites you to download brochures and leaflets in order to explore our premium quality solutions and to have all the major key arguments, features and specifications of a product in your hands, in any place, and at any time.

Comparison tables

Select the category of products you are interested in and this tool will give you an easy overview of what is available at VELP in order to find the product that is perfect for you. These comparison tables provide a brief description with side by side features from basic equipment to the most advanced analytical solutions.

Application notes

Choose among a comprehensive library of Application Notes / White Papers and learn more on how to optimize the performance of your VELP instruments. These documents offer typical analyses of well-known samples, together with official references and suggestions, to make you an expert!


Our compliance to statutory rules and regulations worldwide.
With the CE mark, VELP Scientifica declares that the products are designed and manufactured in compliance with the essential safety requirements of the European Directive on Safety.
The Certification Body (CB) Certificate is an international program created by the IECEE for the acceptance of product safety test results among participating laboratories and certification organizations around the world.
The cNEMKOus mark ensures this product is designed and manufactured in compliance with the International Directive on Safety IEC/EN 61010-1. The cNEMKOus mark has the same legal status as any other NRTL/SCC accredited marks, for U.S. and Canada.
Service offering
Close to our customers: we are committed to supporting you anytime, anywhere
Check technical sheets with answers to most frequently asked questions
How to choose the correct extraction cup?
Standard Glass Extraction Cups Ø 56x120mm are used both in quantitative and qualitative analysis
Small Glass Extraction Cups Ø 48x120mm for processing small samples with high-fat content 
Large Glass Extraction Cups Ø 65x120mm are designed for big samples that have a low-fat content 
Standard Aluminum Extraction Cups Ø 56x120mm can be used only in quantitative analyses
How to choose the correct thimble?
VELP offers thimbles that differ in size and material. 

Cellulose extraction thimbles are produced from high-quality cellulose and have excellent mechanical strength and retention; they are generally used for gravimetric determination of the extracted matter. When it comes to qualitative analysis glass fiber thimbles guarantee no substances release and, therefore, maximum accuracy. 

Instead, the choice of size is strictly correlated to the amount of sample that has to be analyzed.
How to choose the correct gasket?
The gaskets are related to the solvent used for extraction. Vaflon gaskets are universally applicable.

Check the gasket comparison table to learn more.
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