Thermostat (Constant Temperature) Bath

Thermostat (Constant Temperature) Bath

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Thermostat (Constant Temperature) Bath
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Thermostat (Constant Temperature) Bath

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Thermostat (Constant Temperature) Bath – QualiTB™ Series

Thermostat (Constant Temperature) Bath (-83°C to 98°C)

Accurate temperature control is essential for chemical reactions, sample conditioning, calibration, and other laboratory processes that require consistent thermal stability. The QualiTB™ Series Thermostat Bath delivers a precisely controlled liquid environment with uniform temperature distribution, efficient circulation, and integrated heating and refrigeration in a compact system.

A microcomputer-based PID controller continuously regulates temperature to maintain the selected setpoint with minimal overshoot during heating and cooling cycles. The system also supports external circulation, allowing it to provide stable thermal control for connected equipment and process applications. Stainless steel wetted components provide excellent corrosion resistance and dependable performance for laboratory and pilot-scale operations.

Thermostat (Constant Temperature) Bath – QualiTB™ Series Applications

  • Temperature-Controlled Chemical Reactions: Maintains a stable liquid bath for jacketed reactors, flasks, and process vessels where precise temperature control is critical for reaction rate, crystallization, and viscosity consistency.

  • Sample Conditioning: Brings samples to a specified temperature before analytical testing, material characterization, and stability evaluations to improve repeatability and reduce measurement variation.

  • Sensor and Instrument Calibration: Creates a uniform thermal environment for verifying and calibrating temperature probes, sensors, and other measuring instruments that require consistent bath conditions.

  • External Process Temperature Control: Circulates conditioned fluid through reactor jackets, heat exchangers, cooling coils, and temperature-controlled plates to maintain accurate process temperatures.

  • Low-Temperature Material Processing: Supports sub-ambient temperature operation for temperature-sensitive materials that require controlled cooling to maintain stability, reduce evaporation, or slow reaction rates during handling and testing.

Standards

  • IEC 61010-1 — Safety requirements for electrical equipment used in measurement, control, and laboratory applications.

  • IEC 61010-2-010 — Safety requirements for laboratory equipment designed for heating materials, including temperature control baths and circulating systems.

  • IEC 61326-1 — Electromagnetic compatibility (EMC) requirements for electrical equipment used in measurement, control, and laboratory environments.

  • ISO/IEC 17025 (Contextual) — Applicable when the thermostat bath is integrated into accredited calibration and testing laboratories that follow recognized quality and competence requirements.

Thermostat (Constant Temperature) Bath – QualiTB™ Series Key Features

  • Microcomputer-based PID temperature control for accurate setpoint regulation and stable temperature performance.

  • Integrated refrigeration and heating system for reliable operation across sub-ambient and elevated temperature ranges, depending on the model.

  • Bottom-mounted heating design that helps reduce frequent compressor cycling for improved operating efficiency.

  • Low-noise sealed compressor refrigeration system with rapid cooling response and dependable long-term performance.

  • Magnetic stirring system that promotes uniform liquid circulation for consistent temperature distribution throughout the bath.

  • Stainless steel wetted components that provide excellent corrosion resistance and help maintain fluid cleanliness.

  • Supports both internal bath operation and external fluid circulation for reactor jackets, heat exchangers, and other temperature-controlled equipment.

Theory and Method

The QualiTB™ Series maintains precise bath temperature through a closed-loop PID control system that continuously compares the measured temperature with the selected setpoint. The controller automatically adjusts heating and cooling output to minimize temperature variation, maintain stable operating conditions, and reduce overshoot during temperature transitions.

Cooling is generated by a sealed compressor refrigeration system, while a bottom-mounted heating module provides accurate heat input. The coordinated operation of the heating and refrigeration systems helps maintain consistent temperature control while reducing unnecessary compressor cycling during narrow temperature control ranges.

Thermostat (Constant Temperature) Bath – QualiTB™ Series Technical Specifications

Model Temp Range (°C) Control Accuracy (°C) Tank Size (mm) Tank Volume (L) Heating Power (kW) Cooling Capacity @25°C (W) Max Pump Flow (L/min) Max Pump Pressure (bar) Dimensions (L×W×H, mm) Voltage
QualiTB™ 100 -40 to 98 ±0.1 230×150 5 1.2 1420–462 35 0.5 520 × 350 × 720 220V/50Hz~1
QualiTB™ 200 -83 to 98 ±0.1 230×150 5 1938–200   430 × 350 × 960 380V/50Hz~3
QualiTB™ 300 -40 to 98 ±0.1 290×200 10 1.5 2548–980 580 × 450 × 730 220V/50Hz~1
QualiTB™ 400 -83 to 98 ±0.1 290×200 10 2900–230 720 × 650 × 900 380V/50Hz~3
QualiTB™ 500 -40 to 98 ±0.1 290×350 20 3635–980 630 × 520 × 1000 220V/50Hz~1
QualiTB™ 600 -83 to 98 ±0.1 290×350 20 4530–360 940 × 710 × 1010 380V/50Hz~3
QualiTB™ 700 -40 to 98 ±0.1 290×350 30 4080–1270 940 × 710 × 1010 220V/50Hz~1
QualiTB™ 800 -83 to 98 ±0.1 290×350 30 4679–422 1030 × 810 × 1020 380V/50Hz~3
QualiTB™ 900 -40 to 98 ±0.5 350×400 50 10256–2300 70 760 × 610 × 1030 220V/50Hz~1
QualiTB™ 1000 -83 to 98 ±0.5 350×400 50 11200–1480 1030 × 860 × 1030 380V/50Hz~3
QualiTB™ 1100 -40 to 98 ±0.5 500×450 80 2.5 10860–2830 1000 × 800 × 1100 220V/50Hz~1
QualiTB™ 1200 -83 to 98 ±0.5 500×450 80 11670–1800 1220 × 830 × 1350 380V/50Hz~3

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks. If you require these items urgently please contact us to check accurate stock availability and to organize faster shipping methods.

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Important Delivery Information

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks.

Need it urgently? Contact us here to check stock and organize faster shipping.

Orders:
Purchaser acknowledges that when placing an order on the Qualitest:

A. the placing of the order signifies the purchaser's assent to place said order at the Qualitest and that the order will be accepted by the successful processing of the order by Qualitest USA LC.
B. the purchaser typing their name when requested to do so by the Qualitest constitutes a signature to contract
C. the purchaser has the full authority to enter into the contract for such entity, and such grant of authority was indicated by purchaser by placement of the order through the Qualitest.
D. A minimum handling fee will be applied to the shipping total for all orders.

Shipping within the U.S.A.:

All orders will be shipped best way prepaid, via courier for smaller packages or via Freight forwarders for larger crates. A handling fee may be applicable to orders. Title to merchandise transfers to the purchaser upon delivery to the carrier. Loss or damage in transit is the responsibility of the purchaser. Qualitest USA will provide assistance with information needed for processing claims.

Shipping outside of the U.S.A.:

All orders will be shipped best way, via courier for smaller packages or via Freight forwarders for larger crates. A low handling fee may be applicable. Title to merchandise transfers to the purchaser upon delivery to the carrier. Loss or damage in transit is the responsibility of the purchaser. Qualitest USA will provide assistance with information needed for processing claims. Export fees, duties, taxes, and customs clearance are the responsibility of the purchaser.

Shipping insurance is not included, please contact our sales representatives if you need shipping insurance.

Partial shipment: Qualitest USA reserves the right to make partial shipments unless otherwise instructed by the purchaser.

Payment terms: All payments to Qualitest USA are to be made in U.S. Dollars (USD)

A. Credit Card - Qualitest USA will accept Visa, Master Card, AMEX or Discover. Required information from the purchaser is the credit card number, 3 digit security code, expiration date, card holder's name (exactly as it appears on the card), billing address, and valid telephone number for us to use in case of difficulty. Qualitest USA reserves the right to delay shipment pending verification of credit card validity.
B. Wire Transfer - Transfer must be made to Qualitest and confirmed for the full purchase amount (merchandise, handling and shipping) prior to shipment. Please contact us by phone at 1.877.884.TEST (8378)(outside U.S. +1.905.944.9825) or by fax at +1.954.697.8211 for bank information.
C. Open Account - Available to U.S.A. and Canadian customers only. Terms on open accounts are Net 30 days from date of shipment. Qualitest USA reserves the right to refuse shipment of new orders if any unpaid invoices are older than 30 days. Purchasers may apply for an open account by providing:

their bank information
3 credit references from other suppliers
Please allow 5 business days for confirmation of credit and creation of an open account.

Return Policy:

Qualitest USA may accept return of purchased merchandise within North America for refund or credit under the following conditions -

  • There may be an additional restocking fee charged to the transaction if items are already shipped to customer.
  • Goods must be returned to Qualitest USA within 5 days of the date of the receipt of the purchased goods.
  • All freight, duties, customs, and other related shipping charges for the returned merchandise are borne by the purchaser. Shipments made freight collect will be refused.
  • Merchandise must be returned properly packaged in brand new, salable condition, along with original packaging and all documentation, accessories and certificates.
  • Purchaser has confirmed return authorization directly with Qualitest.
  • Merchandise is regular catalog item. Special order items can not be returned.
  • All returned merchandise is subject to inspection by Qualitest. Qualitest reserves the right to refuse return of any merchandise that is used, damaged, or not part of the current published price list. In the case Qualitest does not accept the returned merchandise, reasonable attempts will be made to notify the Buyer and the merchandise will be returned to Buyer as they were received by Qualitest. Damaged merchandise that can be restored to original condition and thus accepted for return will be evaluated on an individual basis. The purchaser will be advised of additional expenses for the repair and restoration of the returned item. After approval, these expenses will be charged to the purchaser in addition to the restocking fee.


Change of Terms:

The acceptance of any order by Qualitest USA is subject to purchaser's assent to all of the terms and conditions set forth herein. Purchaser's assent to these terms and conditions shall be presumed from the purchaser's placement of an order through the Qualitest. Any and all other terms and conditions are expressly rejected, and no addition or modification of terms and conditions shall be binding without the prior agreement of Qualitest USA in writing.

Complete Agreement:

The terms and conditions in the Qualitest web site, incorporated herein by reference, including forms, acknowledgements, quotations, invoices and sales terms and conditions constitute the entire and exclusive agreement between the purchaser and Qualitest USA LC.

Information:

Qualitest USA makes every effort to insure the accuracy of the product information displayed on its web sites, but makes no warranties, expressed or implied, as to the accuracy of the data portrayed on the web sites. Qualitest USA reserves the right to change product information, including pricing information at any time without notice. 

Trademarks and Copyrights:

The WorldofTest.com Qualitest contains trademarked product names. Product names are not to be reproduced or used in any fashion by any party other than Qualitest without the express written consent of Qualitest International Inc.. All pictures, descriptions, and other content of this web site are copyrighted by Qualitest USA and may not be used without the express written permission of Qualitest USA. Purchaser acknowledges that they have no right, title, or interest in the trademarks or copyrights in the products, and purchaser covenants that it will take no action to register or otherwise interfere with such rights. Please contact us with any requests for permission or questions about our trademarks. 

Warranty Disclaimer:

No warranty or affirmation of fact, express or implied, other than expressly set forth herein is made or authorized by Qualitest USA. Qualitest USA disclaims any and all liability for product defect claims. Qualitest USA does not express or imply a warranty that any product on the web site(s) is fit for a particular purpose. Qualitest USA honors the product warranty as published and made available by Qualitest USA. Warranty claims for products not manufactured by Qualitest are the responsibility of the manufacturer. Qualitest USA will always make its best good faith effort to resolve warranty claims. 


Force Majeure:

Qualitest USA shall not be liable for any delay in or impairment of performance resulting in whole or in part from Acts of God, service interruptions, labor disruptions, insurrections, governmental decrees or controls, war risks, severe weather, supplies or raw materials, inability to procure or ship products, inability to obtain permits and/or licenses, or any other circumstances or causes beyond the control of Qualitest USA in the conduct of its business. 

Qualitest USA Privacy Policy 

I. What legal provisions govern our data processing practices? How and from where (internal/external sources) is personal data acquired? What are the rights of the user (web site visitor/registered customer)? 

1. General
As a general principle, no personal details need to be provided when visiting our Internet site. Data made available to us by you is treated in strict confidence and in accordance with the provisions of the Federal Data Protection Act. With a few exceptions (see point 2 below), our web server only registers non-personal (anonymous) data concerning the use of our site. Specifically, the log files of our web server, as a general rule, only contain the user's IP address, the last page visited by the user, the browser used, date, time and the file requested. This anonymous data, however, does not permit conclusions to be drawn about the individual users, and merely serves to prepare statistics on the use of our Internet site for the purpose of its improvement. At the same time, great importance is placed on ensuring that usage data is not linked with personal data. 

2. Personal data

Person-related data (personal data) is only used if the newsletter is ordered (by email), product(s) is (are) ordered, or to supply product information. We undertake to use the personal data entrusted to us only for the purposes stated. Purchase history is retained for assistance with future customer needs. 

II. What security measures are used to protect personal data? What are the user's options for processing personal data? 

3. Technical measures

Databases are optimally protected against third party access, loss, misuse and falsification through the use of appropriate technical means. In order to determine the popularity of individual topic areas, cookies are used in those sections. These text files are stored on your hard disk and facilitate your use of our Internet site. Thanks to these cookies, there is no need for specific registration each time you visit a section requiring registration, and we can supply you with the personalized contents you request. 

It is for you to decide whether you want to work with cookies and, if so, which kind (permanently stored on the hard disk or only placed for the time of the browser activity). However, we draw your attention to the fact that access to fields requiring registration is only possible with activated cookies. 

III. What data is communicated to third parties and for what purposes? 

4. Communication of personal data

Personal data entrusted to us by you is not communicated, leased or sold to third parties. 

IV. Which department answers questions about the processing of personal data? 

5. Contact

In the light of the rapid technical developments in connection with the Internet, we make every effort to constantly improve our Internet site and technical precautions, including those connected with data protection. We will keep you suitably informed about such measures. Any changes will be published here. Further information is available at any time by contacting Qualitest USA.

Disclaimer of liability Qualitest USA shall not be liable for direct, indirect or consequential losses resulting from or in connection with access to, use of or queries to the Qualitest web site or its links with other web sites, even if Qualitest USA has previously been informed of the possibility of such losses. No guarantee is provided as to the accuracy of the information disseminated via the Qualitest USA web site. In addition, Qualitest USA guarantees neither the reliability nor the completeness of the information contained on its web site. The information made available on the Qualitest and WorldofTest.com web site may be amended at any time without prior notice. In particular, Qualitest USA shall not be liable for losses caused by transmission errors, technical faults and interruptions, breakdowns or an unlawful interference with the user's data processing system or the generally accessible systems and transmission networks. Nor shall Qualitest USA be liable for losses resulting from breakdowns, interruptions or overloads occurring to any data processing systems. If certain links are activated on the Qualitest and WorldofTest.com web site, the user may under certain circumstances leave the Qualitest web site. Qualitest USA assumes no responsibility for the contents, products or services offered or other information or offers contained on these linked web sites. 

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