Thermo Scientific TSGP20 Precision GP 20 General Purpose Water Bath

Thermo Scientific TSGP20 Precision GP 20 General Purpose Water Bath

The Thermo Scientific TSGP20 General Purpose Water Bath is a 20-liter digital laboratory water bath designed for dependable temperature control across a broad range of research, clinical, pharmaceutical, biotechnology, academic, and industrial laboratory applications. With an operating range from ambient temperature to 100°C, excellent temperature stability of ±0.1°C, uniformity of ±0.2°C, four programmable temperature presets, and advanced microprocessor controls, the Precision GP 20 provides a practical solution for laboratories that need consistent heating of samples, reagents, media, tubes, bottles, and other temperature-sensitive materials.

The spacious 20-liter stainless-steel chamber provides a working area of approximately 11.7"L x 19.7"W x 5.9"H, giving laboratories considerably more usable space than smaller benchtop baths while retaining a relatively compact footprint. A 1200-watt heating system provides the capacity needed to bring larger water volumes to temperature and maintain stable operating conditions during routine laboratory work.

The TSGP20 incorporates a digital microprocessor controller, monochrome LCD display, four temperature presets, audible alarms, programmable auto-on and auto-off timers, over-temperature protection, and low-fluid protection. These features make the bath easy to configure for repetitive laboratory procedures while helping protect samples and the bath itself from undesirable operating conditions.

A seamless stainless-steel interior simplifies cleaning and provides resistance to normal laboratory use, while the epoxy powder-coated exterior offers additional chemical and corrosion resistance. The 20-liter model also features a quick-disconnect drain, making water changes and routine cleaning easier than manually emptying a large bath.

Available used and refurbished from American Instrument Exchange, the Thermo Scientific Precision GP 20 provides laboratories with dependable general-purpose temperature control at a lower acquisition cost than purchasing comparable equipment new.

Key Features

• Thermo Scientific Precision GP 20

• Catalog number TSGP20

• 20-liter chamber capacity

• Temperature range from ambient to 100°C

• Temperature stability of ±0.1°C

• Temperature uniformity of ±0.2°C

• Digital microprocessor temperature controller

• Monochrome LCD display

• Four programmable temperature presets

• Programmable auto-on and auto-off timers

• Audible operating alarms

• Over-temperature protection

• Low-fluid-level protection

• 1200 W heating capacity

• Seamless stainless-steel chamber

• Epoxy powder-coated steel exterior

• Large usable work area

• Quick-disconnect drain

• Removable lid capability

• Compact benchtop design for a 20-liter bath

• 120/230V, 50/60 Hz electrical compatibility depending configuration

• Used and refurbished by American Instrument Exchange

Overview

Laboratory water baths provide a simple and effective way to maintain samples at a controlled temperature.

Because water transfers heat efficiently and surrounds vessels evenly, a water bath can provide more uniform sample heating than direct contact with a hot plate or other localized heat source.

The Thermo Scientific TSGP20 General Purpose Water Bath is designed as a general-purpose water bath, making it suitable for laboratories that need one versatile bath for many routine procedures rather than an application-specific system.

Potential uses range from warming reagents and incubating samples to thawing materials, maintaining media at working temperature, supporting enzyme reactions, and carrying out other procedures requiring stable temperature conditions.

Key Specifications

Specification	Details
Manufacturer	Thermo Scientific
Product Line	Precision General Purpose Baths
Model	Precision GP 20
Catalog Number	TSGP20
Equipment Type	General Purpose Laboratory Water Bath
Chamber Capacity	20 L
Temperature Range	Ambient to 100°C
Temperature Stability	±0.1°C
Temperature Uniformity	±0.2°C
Controller Type	Digital microprocessor
Display	Monochrome LCD
Temperature Presets	4
Heating Capacity	1200 W
Chamber Material	Stainless steel
Exterior Material	Epoxy powder-coated steel
Working Area	11.7"L x 19.7"W x 5.9"H
Working Area, Metric	297 x 500 x 150 mm
Exterior Dimensions	15.4"L x 21.8"W x 9.2"H
Exterior Dimensions, Metric	392 x 555 x 233 mm
Electrical	120/230 V, 50/60 Hz
Amperage	Approx. 9.0–10.5 A at 120V / 4.3–5.0 A at 230V
Drain	Quick-disconnect drain
Safety	Over-temperature and low-fluid protection
Certifications	UL, CE
Condition	Used / Refurbished
Supplier	American Instrument Exchange

Thermo Scientific TSGP20 General Purpose Water Bath Common Applications

The Thermo Scientific TSGP20 is suitable for a wide variety of general laboratory procedures, including sample incubation, reagent warming, media warming, enzyme reactions, biochemical assays, thawing frozen materials, temperature equilibration, microbiology workflows, molecular biology procedures, clinical research, pharmaceutical development, quality-control testing, and general sample preparation.

Its relatively large 20-liter chamber makes it particularly useful when multiple vessels need to be maintained at the same temperature simultaneously.

Ideal Laboratory Types

The Precision GP 20 is well suited for biotechnology laboratories, pharmaceutical companies, clinical research laboratories, academic research facilities, microbiology laboratories, molecular biology groups, chemistry laboratories, food and beverage testing facilities, environmental laboratories, quality-control departments, and industrial research laboratories.

The combination of broad temperature range and straightforward digital control also makes it a good shared instrument for multi-user laboratories.

20-Liter Chamber Capacity

The Thermo Scientific TSGP20 General Purpose Water Bath provides a nominal chamber capacity of 20 liters.

This places it between Thermo Scientific's smaller 10-liter GP 10 and larger 28-liter GP 28 models.

A 20-liter bath provides enough room for substantial sample loads without requiring the additional bench space of the largest models.

The usable work area measures approximately:

11.7"L x 19.7"W x 5.9"H

This broad, relatively shallow configuration makes it easy to arrange racks, bottles, tubes, and other laboratory vessels across the bath.

Ambient to 100°C Temperature Range

The Precision GP 20 can maintain temperatures from approximately ambient to 100°C under appropriate operating conditions.

This broad range supports both low-temperature incubation close to room temperature and demanding high-temperature laboratory procedures.

Typical operating temperatures may include:

• 25°C for controlled equilibration

• 37°C for biological and biochemical procedures

• 42°C for selected molecular biology applications

• 50–65°C for reagent and sample warming

• Higher temperatures for specialized laboratory procedures

Because this is a heating bath rather than a refrigerated circulator, it cannot actively cool samples below ambient temperature.

±0.1°C Temperature Stability

Thermo Scientific specifies temperature stability of approximately:

±0.1°C

Temperature stability describes how closely the bath maintains its setpoint over time once equilibrium has been reached.

Good stability is particularly valuable for procedures in which small temperature fluctuations could alter reaction rates or experimental conditions.

Applications that may benefit include:

Enzyme reactions
Sample incubations
Biochemical assays
Reagent preparation
Temperature-sensitive analytical procedures

±0.2°C Temperature Uniformity

Temperature uniformity is rated at approximately:

±0.2°C

under specified test conditions.

Uniformity describes the degree to which water temperature remains consistent across different locations within the bath chamber.

Good uniformity helps ensure that samples placed at opposite ends of the bath experience similar thermal conditions.

This becomes increasingly important in a larger 20-liter bath containing multiple racks or vessels.

Advanced Microprocessor Control

The Thermo Scientific TSGP20 General Purpose Water Bath uses a digital microprocessor controller to regulate bath temperature.

Electronic temperature control offers greater precision and repeatability than traditional analog thermostatic systems.

The controller continuously manages heater output to maintain the programmed setpoint.

Operators can monitor the bath through the front-mounted LCD display without relying on a separate thermometer for routine observation.

Four Temperature Presets

The TSGP20 allows users to save four frequently used temperature settings.

This is especially convenient in laboratories where the same bath may be used for several standard procedures throughout the week.

For example, a laboratory might store presets for:

25°C

37°C

56°C

and

65°C

rather than manually entering each temperature every time the application changes.

The actual preset temperatures can be selected according to the laboratory's workflow.

Auto-On and Auto-Off Timers

Programmable timing functions allow laboratories to control when the bath begins or ends operation.

An auto-on timer can prepare the bath before staff need it.

An auto-off timer can prevent the system from remaining heated unnecessarily after a procedure is complete.

These functions can improve workflow efficiency while reducing unnecessary heater operation.

Audible Alarms

The Precision GP 20 provides audible alarms to alert operators to selected operating conditions.

This gives laboratory personnel another layer of protection beyond simply monitoring the display.

Audible notification is particularly useful in shared laboratories where operators may move between several rooms or pieces of equipment while a procedure is underway.

Thermo Scientific TSGP20 General Purpose Water Bath Over-Temperature Protection

Thermo Scientific incorporates dedicated over-temperature safety circuitry into the Precision GP series.

This system is designed to help prevent uncontrolled heating if the primary temperature-control system develops a problem.

Over-temperature protection is an important feature for any unattended heating application because excessive temperatures could potentially:

• Damage samples

• Damage vessels

• Evaporate bath water

• Stress equipment components

• Create a laboratory safety concern

The independent safety system provides an additional layer of protection.

Low-Fluid Protection

Operating a water bath with insufficient fluid can damage the heater and cause abnormal temperature conditions.

The Precision GP 20 includes low-fluid protection designed to help prevent overheating when the water level becomes too low.

Users should still monitor bath level regularly, particularly during prolonged high-temperature operation when evaporation occurs more rapidly.

1200-Watt Heater

The GP 20 uses a 1200-watt heating system.

A larger water bath contains considerably more thermal mass than a small two- or five-liter unit.

The 1200 W heater provides the power necessary to heat the 20-liter chamber efficiently and maintain operating temperature as samples are introduced.

Recovery time will vary depending on factors such as:

• Initial water temperature

• Setpoint

• Bath volume

• Sample temperature

• Number and size of vessels

• Whether the lid is installed

Stainless-Steel Chamber

The bath chamber is constructed from seamless stainless steel.

The absence of internal seams simplifies cleaning because there are fewer joints where contamination, residue, or mineral deposits can accumulate.

Stainless steel also provides good durability for routine laboratory use.

Proper maintenance remains important, particularly when salts, corrosive materials, or tap-water minerals are present.

Corrosion-Resistant Exterior

The outer cabinet is constructed from steel with an epoxy powder-coated finish.

This provides additional resistance to chemicals and corrosion encountered during ordinary laboratory use.

Spills should still be cleaned promptly according to laboratory procedures.

Quick-Disconnect Drain

Emptying a 20-liter bath manually can be inconvenient.

For that reason, Thermo equips the GP 20 with a quick-disconnect drain.

The drain simplifies:

• Routine water changes

• Chamber cleaning

• Preventative maintenance

• Storage or relocation of the bath

This is particularly useful compared with smaller water baths that must be physically lifted and tipped to empty them.

Using the Bath Cover

A properly fitted bath cover helps:

• Reduce evaporation

• Improve temperature stability

• Reduce heat loss

• Shorten warm-up and recovery times

• Limit contamination entering the bath

Thermo offers the GP 20 with a clear polycarbonate gable-style cover in its new configuration.

For a used or refurbished unit, customers should confirm which cover and accessories are included with the specific instrument.

Applications at 37°C

One of the most common laboratory water-bath temperatures is 37°C.

This approximates normal human physiological temperature and is widely used for:

• Biological sample incubation

• Media warming

• Enzyme reactions

• Cell-culture support procedures

• Clinical laboratory preparations

• Reagent equilibration

The GP 20's ±0.1°C stability and ±0.2°C uniformity make it well suited for routine controlled-temperature work at 37°C.

Molecular Biology Applications

Water baths are widely used in molecular biology laboratories.

Potential applications for the TSGP20 include:

• Reagent warming

• Buffer equilibration

• Enzyme incubation

• Nucleic-acid procedures

• Sample thawing

• Controlled reaction incubation

For protocols requiring highly precise temperature cycling, a dedicated thermal cycler or other specialized instrument may be more appropriate.

Microbiology Applications

Microbiology laboratories can use the Precision GP 20 for procedures such as:

• Media warming

• Reagent equilibration

• Controlled sample incubation

• Melting or maintaining prepared media

• Temperature-controlled sample preparation

The large chamber can accommodate multiple containers simultaneously, making it useful for laboratories preparing significant volumes of media or reagents.

Pharmaceutical & Biotechnology Applications

Pharmaceutical and biotechnology laboratories often require stable temperature conditions for sample preparation and development work.

The TSGP20 can support:

Formulation research
Reagent preparation
Stability-related sample preparation
Biochemical assays
Protein workflows
General R&D incubation

For regulated processes, users remain responsible for establishing appropriate calibration, qualification, documentation, and operating procedures.

Food & Beverage Laboratory Applications

General-purpose water baths are also common in food science and quality-control laboratories.

Applications may include:

• Sample preparation

• Controlled warming

• Extraction procedures

• Temperature equilibration

• Microbiological testing

• Quality-control methods

The 20-liter chamber provides flexibility for larger sample batches.

Precision GP 20 vs. Precision GP 10

The Precision GP 10 provides a 10-liter chamber, while the GP 20 doubles nominal capacity to 20 liters.

The GP 20 is preferable when laboratories need to:

• Process more samples at once

• Use larger racks

• Accommodate larger vessels

• Share a bath among multiple users

The GP 10 may be preferable where bench space is limited and routine batch sizes are smaller.

Precision GP 20 vs. Precision GP 28

The GP 20 and GP 28 share the same approximate 11.7 x 19.7-inch chamber footprint.

The primary difference is depth.

The GP 20 has an approximately:

5.9-inch working depth

while the GP 28 provides approximately:

7.9 inches.

The GP 28 is therefore more appropriate for taller containers or applications requiring greater fluid depth.

The GP 20 offers the same broad working footprint in a shorter, more compact bath.

General-Purpose Water Bath vs. Circulating Water Bath

The TSGP20 is a general-purpose non-circulating water bath.

It uses natural convection and controlled heating to maintain temperature throughout the chamber.

A circulating water bath adds a pump that actively moves water through the chamber.

Circulating baths may be preferable for applications requiring extremely rapid equilibration, external circulation, or specialized temperature performance.

For routine incubation, warming, thawing, and sample preparation, a general-purpose bath such as the GP 20 is often simpler and more economical.

Water Quality & Routine Maintenance

Water quality can affect long-term bath condition.

Tap water containing high levels of dissolved minerals can eventually leave deposits on stainless-steel surfaces and heating components.

Laboratories should follow manufacturer recommendations regarding acceptable bath water and additives.

Routine maintenance should include:

• Regular water changes

• Cleaning the chamber

• Inspecting for mineral buildup

• Checking the drain

• Monitoring bath level

• Inspecting the lid

• Keeping the exterior clean

Appropriate antimicrobial bath additives may be used when compatible with the manufacturer recommendations and application.

Refurbishment & Testing by American Instrument Exchange

Although a laboratory water bath is relatively straightforward compared with larger laboratory instruments, temperature performance should still be verified before a used unit returns to service.

American Instrument Exchange evaluates refurbished water baths for proper operation.

Testing may include:

• Controller function

• Display operation

• Heating performance

• Temperature setpoint response

• Temperature stability

• Temperature distribution

• Alarm operation

• Low-fluid protection

• Over-temperature protection

• Timer functions

• Drain condition

• Chamber condition

• Electrical operation

Units are cleaned and prepared for laboratory use before shipment.

Refurbished Thermo Scientific Water Baths from American Instrument Exchange

Purchasing a used and refurbished Thermo Scientific Precision GP 20 from American Instrument Exchange can provide laboratories with dependable temperature-control equipment at a lower cost than purchasing the same or comparable water bath new.

Refurbished water baths are particularly attractive for laboratories that need additional capacity, are expanding rapidly, or want dependable general-purpose equipment without committing significant capital to a relatively simple laboratory instrument.

American Instrument Exchange supplies used and refurbished water baths along with incubators, centrifuges, refrigerators, freezers, ultra-low freezers, biosafety cabinets, shakers, ovens, autoclaves, and other laboratory equipment.

Shipping & Installation

The Precision GP 20 measures approximately:

15.4"L x 21.8"W x 9.2"H

without the cover.

Its benchtop configuration makes installation relatively straightforward compared with larger floor-standing laboratory equipment.

Before installation, laboratories should confirm:

• Adequate bench space

• Level supporting surface

• Appropriate electrical service

• Clearance for the lid

• Access to the drain

• Convenient location for water changes

The bath should be placed where accidental spills or drainage will not affect sensitive electrical equipment.

Related Laboratory Equipment

Laboratories using the Thermo Scientific Precision GP 20 may also require incubators, dry baths, heat blocks, orbital shakers, shaking water baths, centrifuges, laboratory refrigerators, laboratory freezers, ultra-low freezers, autoclaves, and other sample-preparation equipment.

American Instrument Exchange supplies used and refurbished laboratory equipment for biotechnology, pharmaceutical, clinical, academic, environmental, food-science, and industrial laboratories.

Thermo Scientific TSGP20 Precision GP 20 Frequently Asked Questions

What is the Thermo Scientific TSGP20?

The TSGP20 is a 20-liter Precision GP general-purpose laboratory water bath designed for controlled heating from ambient temperature to approximately 100°C.

What is the capacity of the GP 20?

The bath has a nominal 20-liter chamber capacity.

What is the temperature range?

The TSGP20 operates from approximately ambient temperature to 100°C under appropriate operating conditions.

Can the TSGP20 cool below room temperature?

No. The Precision GP 20 is a heating water bath and does not contain refrigeration for operation below ambient temperature.

What is the temperature stability?

Thermo Scientific specifies approximately ±0.1°C temperature stability under stated test conditions.

What is the temperature uniformity?

Temperature uniformity is approximately ±0.2°C under stated test conditions.

Is the TSGP20 suitable for 37°C incubation?

Yes. The GP 20 is well suited for routine laboratory procedures requiring stable operation around 37°C.

How large is the usable chamber?

The working area measures approximately 11.7"L x 19.7"W x 5.9"H.

What are the exterior dimensions?

The unit measures approximately 15.4"L x 21.8"W x 9.2"H without its cover.

How powerful is the heater?

The TSGP20 uses a 1200-watt heating system.

Does the bath have a digital controller?

Yes. It uses an advanced digital microprocessor controller with a monochrome LCD display.

Can commonly used temperatures be saved?

Yes. The Precision GP 20 stores four temperature presets for frequently used setpoints.

Does the bath have a timer?

Yes. Programmable auto-on and auto-off timers allow users to schedule operation.

Does the GP 20 have alarms?

Yes. Audible alarms provide notification of selected operating conditions.

Does it have over-temperature protection?

Yes. Independent safety circuitry is designed to help protect against thermal runaway.

Does it have low-water protection?

Yes. Low-fluid protection helps prevent damage caused by operation with insufficient water.

Does the GP 20 have a drain?

Yes. The 20-liter model incorporates a quick-disconnect drain to simplify water changes and chamber cleaning.

Is the chamber stainless steel?

Yes. The bath uses a seamless stainless-steel interior chamber.

What voltage does the TSGP20 require?

The Precision GP 20 platform is available for 120/230V, 50/60 Hz operation depending on the specific electrical configuration. The data plate on the individual refurbished unit should be verified before installation.

Can I use the GP 20 for molecular biology?

Yes. Typical uses include reagent warming, enzyme incubations, sample thawing, buffer equilibration, and other controlled-temperature procedures.

Can it be used for microbiology?

Yes. The GP 20 can support media warming, sample incubation, reagent preparation, and other microbiology workflows.

Is a cover recommended?

Yes. A cover can reduce evaporation and heat loss and can improve temperature stability and recovery. Customers purchasing a refurbished unit should confirm whether a cover is included with the specific instrument.

How does the GP 20 compare with the GP 10?

The GP 20 provides 20 liters of capacity versus 10 liters for the GP 10, making it more suitable for larger sample loads and multiple users.

How does the GP 20 compare with the GP 28?

Both have a similar chamber footprint, but the GP 28 is deeper and provides 28 liters of capacity. The GP 20 offers a more compact height while retaining a broad working area.

Is this a circulating water bath?

No. The Precision GP 20 is a general-purpose non-circulating water bath. Applications requiring active circulation may be better served by a dedicated circulating bath.

Is the Thermo Scientific TSGP20 available used and refurbished?

Yes. American Instrument Exchange offers used and refurbished laboratory equipment, including Thermo Scientific general-purpose water baths such as the TSGP20.

How does American Instrument Exchange test a refurbished water bath?

AIE evaluates heating, controls, temperature performance, alarms, safety functions, timers, electrical operation, chamber condition, and other major functions before preparing a refurbished water bath for shipment.