Grant Instruments equipment

About Grant Instruments

Grant Instruments is a British scientific laboratory equipment manufacturer headquartered in Royston, Cambridgeshire, in the United Kingdom. The company specialises in temperature control, sample preparation, and data acquisition for laboratories. Its product range covers water baths, temperature control and circulating baths, dry block heaters, ultrasonic baths, shaking water baths, refrigerated chillers and coolers, and data logging instruments. Named product lines include the Sub Aqua Pro, JB Academy, Optima, ecocool, the XUB and XUBA ultrasonic bath series, the QBD and BT dry block heater ranges, the Controlled Rate Freeze Thaw system, and the Grant Bio line. In March 2025 the business was acquired by Royston Instruments Ltd, confirmed on grantinstruments.com. On Questpair, 265 listings carry this maker's equipment from 13 verified suppliers and distributors.

Grant Instruments product lines

Temperature control is the core of the company's output. Water baths form the largest group, with the Sub Aqua Pro covering general-purpose heating and the Optima circulating baths holding a tighter set point and driving heat to external apparatus through a pump. Shaking water baths combine the reservoir with an agitation platform for work that needs both temperature and mixing. The JB Academy range addresses teaching and routine laboratory use at a lower specification.

Dry block heaters in the QBD and BT series replace the liquid reservoir with metal blocks drilled for specific tube and plate formats, which suits sample preparation where a liquid bath would be inconvenient. The XUB and XUBA ultrasonic bath series handle cleaning and degassing through cavitation. On the cooling side, the ecocool line and the refrigerated chillers extend the controllable range below ambient temperature.

Several lines sit within life science laboratory equipment. Dry block heaters and water baths carry out incubation for molecular biology and protein work, holding reactions at a fixed temperature for enzyme digests and immunoassay steps. The Controlled Rate Freeze Thaw system manages the freezing and thawing of biological samples at a defined rate, work that matters in cell culture and biobanking where an uncontrolled rate damages cells. The Grant Bio range groups the company's dedicated life science instruments. Shaking water baths support sample preparation in microbiology and cell culture, maintaining a temperature while agitating a suspension. These applications place parts of the catalogue alongside the equipment a genomics or proteomics laboratory uses for sample handling, with temperature-controlled incubation and defined-rate freezing being the two tasks most directly tied to this maker's strengths.

Data acquisition and data logging make up a separate strand, recording temperature and other parameters over time for monitoring and compliance. In the listed stock this side is narrower than the heating and cooling equipment.

Grant Instruments stock on Questpair

The catalogue for this brand runs to 265 listings from 13 verified suppliers and distributors across 7 countries. Of these, 97 percent are used. Prices run from EUR 65 to EUR 7.000. The average listing price is EUR 624.

The spread reflects the product mix. Compact dry block heaters and small benchtop baths sit at the lower end, while larger refrigerated circulating baths and shaking units reach the upper end. A buyer should read a model family against the intended task, since a static bath, a circulating bath, and a dry block heater address different needs despite overlapping on temperature.

Where a listing needs supporting documentation, manuals can be requested through Questpair, with specialists responding within one hour. Parts for Grant Instruments equipment can be sourced via Questpair. Warranty is often possible and is arranged in consultation for the specific listing. Used units are priced below new stock, which is the practical difference between the two conditions to weigh when choosing; for the terms attached to any individual unit, the listing itself is the point of reference.

Questpair review of Grant Instruments

Our take based on listings data and supplier feedback

Grant Instruments occupies a defined position in laboratory temperature control, and the catalogue on Questpair reflects that focus rather than a broad general-purpose range. The first point a buyer encounters is the breadth of temperature equipment itself. Water baths sit at the centre of the portfolio, from the Sub Aqua Pro general-purpose units through to the Optima circulating baths that hold a set point tightly enough for enzyme kinetics and other work where a degree matters. Alongside these sit dry block heaters in the QBD and BT ranges, which replace a liquid reservoir with interchangeable blocks for tubes and plates, and the ecocool refrigerated line for applications that need a controlled temperature below ambient. A buyer comparing listings should read the model family against the intended use, because a shaking water bath and a static circulating bath address different tasks despite sharing a reservoir.

The second observation concerns condition and what it means for this maker specifically. Of the Grant Instruments listings, 97 percent are used. For temperature control equipment this is less of a reservation than it would be for electronics, because the core of a bath or a block heater is a heating element, a sensor, and a controller, components that age predictably and whose performance is straightforward to verify against a reference thermometer on arrival. The practical consequence is access: established lines that are no longer on a current price list remain available through the second-hand market, and a lab standardising on a particular bath can often match existing stock. Where a buyer wants assurance, warranty on an individual Grant Instruments listing is arranged in consultation for that specific unit rather than offered as a blanket term.

The third point is the price spread. Listings run from EUR 65 to EUR 7.000, with an average of EUR 624. That range maps onto the product mix rather than being arbitrary. The low end holds compact dry block heaters and small benchtop baths suited to a single workstation; the upper end reflects larger refrigerated circulating baths and shaking units with greater capacity and tighter control. A buyer setting a budget should therefore read the figure against the capability needed, since the gap between the two ends is largely a gap in reservoir size, cooling capability, and controller sophistication.

Taken together, the Questpair catalogue for this brand suits a buyer who has already identified temperature control as the requirement and wants to weigh specific Grant Instruments lines against each other. The data acquisition and data logging side of the company is present but secondary in the listed stock, so a laboratory whose primary need is logging rather than heating or cooling will find the selection narrower. For the central use cases, incubation, thawing, circulating heat to external apparatus, and ultrasonic cleaning, the range of lines and the depth of used stock give a buyer room to match a unit to a protocol and a budget.

**Temperature control across a wide range**

Grant Instruments builds water baths, circulating baths, and dry block heaters that hold set temperatures for incubation, enzyme assays, and sample thawing, with circulating models driving external apparatus from the same reservoir.

**Catalogue weighted toward used stock**

Of the Grant Instruments listings on Questpair, 97 percent are used, which gives buyers access to established lines such as the Sub Aqua Pro and the Optima series at prices below new equipment.

**Range spanning benchtop to mid-budget**

Prices run from EUR 65 to EUR 7.000, covering compact dry block heaters at the low end and larger refrigerated circulating baths toward the top.