Lab Procurement Services offers a comprehensive range of high-quality, affordable constant temperature equipment to handle a variety of applications.  Please see individual categories for

As well as the Parts and Accessories sections.  Our experts are here to help with product selection and quotations - give us a call, or set up a meeting!

Before ordering, check the temperature range against your method: the digital water baths here cover ambient +5° to 99°C, while refrigerated circulators reach -30°C at the low end and up to 170°C at the high end. Compare bath volume, and for chillers the cooling capacity (in kW or HP) and pump type, since the DuraChill CA chillers are listed with either a turbine or a positive displacement pump. Confirm voltage and frequency (120V 60Hz, 208-240V or 230V). Plan for the bath fluid too, such as polycool glycol mixes for below-ambient work and algae inhibitor for water baths, plus the fittings, lids and bypass kits your setup needs.

Constant Temperature: common questions

What is constant temperature equipment?

Constant temperature equipment holds samples, vessels or connected instruments at a set temperature. It includes water and bead baths, heated and refrigerated circulators, recirculating chillers, immersion coolers, general-purpose, CO2 and shaking incubators, humidity test chambers and plant growth chambers. The right choice depends on temperature range, stability, capacity, and whether you need to heat, cool or both.

What is the difference between a circulator and a chiller?

A circulator has a bath with a heater, often refrigeration, and a pump that can control the bath itself or circulate fluid through external equipment. A recirculating chiller is mainly built to remove heat, supplying cooled fluid to equipment such as rotary evaporators, condensers or lasers. Chillers typically focus on cooling capacity, while circulators offer wider temperature ranges and their own working bath.

What fluid should I use in a lab bath or circulator?

Distilled or deionized water is commonly used for moderate temperatures, often with an algae inhibitor to keep the bath clean. For temperatures near or below freezing, a water and glycol mix is typical, and specialty fluids or oils are used at higher temperatures. Use a fluid rated for your full operating range and approved by the equipment manufacturer.

Can I get a quote on a chiller or incubator?

Yes. Volume and quote pricing is available through the Contact Us page, and approved business accounts can pay by purchase order. Larger equipment often ships directly from the manufacturer, so lead times vary by item. Include the model, voltage and quantity in your request so the quote matches what you need.

Constant Temperature

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  1. Chiller, DuraChill CA, 1/3HP (1.28kW), Positive Displacement Pump, 1/3HP, 240V, 50Hz
    Manufacturer: Polyscience Corp
    Durachill CA03 Chiller with Positive Displacement Pump, 1/3HP, 240V, 50Hz Cooling Capacity at 20deg.C: 1280 W; Max Flow 2.0 gpm , 7.6 l/min; Max Pressure 83 psi , 5.7 bar EA/1 (1 per EA )
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    was $7,585.00 Special Price $7,114.73
  2. Fitting, 1/4” male NPT x 1/4” (6 mm) hose barb, brass
    Manufacturer: Polyscience Corp
    Fitting, 1/4in. male NPT x 1/4in., 6 mm hose barb, brass EA /1 (1 per EA)
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    $6.00
  3. Lid, Water Bath, 5L, High-Clearance, (Models WB05 and WBE05)
    Manufacturer: Polyscience Corp
    High-Clearance Lid, 5L Water Bath, Model WB05 EA /1 (1 per EA)
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    $86.75
  4. Fitting, 1/4” male NPT x 3/8” (9.5 mm) hose barb, brass
    Manufacturer: Polyscience Corp
    Fitting, 1/4in. male NPT x 3/8in., 9.5 mm hose barb, brass EA /1 (1 per EA)
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    $6.00
  5. Refrigerated Circulator, 28L, Advanced Digital (-30° to 200°C), 120V, 60Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
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    was $8,284.75 Special Price $7,771.09
  6. RS232 Retrofit Kit (6000 Series & 1.5HP Chillers)
    Manufacturer: Polyscience Corp
    RS232 Retrofit Kit, 6000 Series Chillers only EA /1 (1 per EA)
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    $234.00
  7. Open Bath, 20L, Stainless Steel, Advanced Digital (Ambient +10° to 150°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
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    was $3,397.75 Special Price $3,187.09
  8. Probe, Pt100, Rear Mount, DuraChill CA Chillers
    Manufacturer: Polyscience Corp
    Probe, Pt100, Rear Mount, DuraChill CA Chillers (1 per EA )
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    $214.25
  9. Chiller, DuraChill CA,1/4HP (0.85kW), Positive Displacement Pump, 1/4HP, 120V, 60Hz
    Manufacturer: Polyscience Corp
    Key Features: Large, full-color touchscreen display with intuitive interface and operation in five languages (English, Spanish, French, German, Mandarin) Cooling at ambient temperatures as high as 40°C Choice of ultra-reliable Turbine or Positive Displacement pumps Fluid temperature control range from -10° to 70°C DynamicFilter™ self-cleaning filter system Ultraviolet anti-biological light system User-adjustable temperature, pressure, and flow rate alarms Heating to 70°C, without additional heater for more energy-efficient operation RS232, Status relay, dry contact; optional USB-B and remote probe ports Cool Command™, WhisperCool® (1 per EA )
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    was $7,145.75 Special Price $6,702.71
  10. Heated Circulator, 28L, Advanced Programmable (Ambient +10° to 200°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
    Learn More
    was $5,388.75 Special Price $5,054.65
  11. Immersion Probe Cooler, IP-35, 1.75” Ø Rigid Coil Probe, (-35° to +40°C), 120V, 60Hz
    Manufacturer: Polyscience Corp
    Key Features: Continuous cooling to temperatures as low as -100°C Designed to run at maximum cooling An economical alternative to dry ice or liquid nitrogen Excellent for trapping applications, freeze drying, and rapidly cooling small volumes of liquids (1 per EA)
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    was $3,928.00 Special Price $3,684.46
  12. Open Bath, 28L, Stainless Steel, Advanced Programmable (Ambient +10° to 150°C), 120V, 60Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
    Learn More
    was $4,538.25 Special Price $4,256.88
  13. Immersion Probe Cooler, IP-60, 1.5” Ø Rigid Coil Probe with 180° bend, (-60° to -20°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    Immersion Probe Cooler, IP-60, 1.5” Ø Rigid Coil Probe with 180° bend, (-60° to -20°C), 240V, 50Hz (1 per EA )
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    was $3,168.00 Special Price $2,971.58
  14. Heated Circulator, 28L, Standard Digital (Ambient +10° to 170°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    Key Features: Large, universal icon and English display Swivel 180™ Rotating Controller On-board connectivity: RS-232 serial output On-screen prompts Automatic performance optimization Single-point calibration capability (1 per EA)
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    was $4,105.00 Special Price $3,850.49
  15. Water Bath, 20L Digital, (Ambient +5° to 99°C), 240V, 50/60Hz
    Manufacturer: Polyscience Corp
    Key Features: Displays actual and set point temperature simultaneously Programmable pre-sets for frequently used temperatures Integrated timer Hinged gable cover Calibration off-set feature Reservoir sizes from 2 to 28 liters Reservoir made of 304 Stainless Steel Reservoir drain (10 liter and larger baths) Primary and automatic safety thermostats Also compatible with waterless bath beads All 220-240V units are compatible with both 50Hz and 60Hz electrical systems (1 per EA )
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    was $1,139.75 Special Price $1,069.08
  16. Air Filter for LS Benchtop Chillers
    Manufacturer: Polyscience Corp
    Air Filter for LS Benchtop Chillers EA /1 (1 per EA)
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    $49.25
  17. Refrigerated Circulator, 15L, Advanced Programmable (-40° to 200°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
    Learn More
    was $8,997.25 Special Price $8,439.43
  18. polycool MIX -25 (Temperature Range: -25° to 100°C), case of 5 x 1/2 gallon (1.9 L)
    Manufacturer: Polyscience Corp
    Optimizes performance in refrigerated products; protects against freezing. Keeps reservoir clean. (5 per CS )
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    $171.00
  19. Heated Circulator, 15L, Advanced Digital (Ambient +10° to 200°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
    Learn More
    was $3,799.50 Special Price $3,563.94
  20. Heated Circulator, 20L, Advanced Digital (Ambient +10° to 200°C), 120V, 60Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
    Learn More
    was $4,310.25 Special Price $4,043.01
  21. Coliform Bath, 28L,MX (Ambient +10° to 135°C), 120V, 60Hz
    Manufacturer: Polyscience Corp
    Key Features: Ideal for fecal coliform and E.coli testing MX Temperature Controller 28 liter reservoir with hinged, see-through gable cover Large, easy to read display DuraTop™ Large bath opening Large, universal icon and English display On-screen prompts Single-point calibration capability (1 per EA)
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    was $3,467.00 Special Price $3,252.05
  22. Refrigerated Circulator, 28L, Advanced Programmable (-30° to 200°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
    Learn More
    was $9,243.50 Special Price $8,670.41
  23. Refrigerated Circulator, 20L, Advanced Programmable (-30° to 200°C), 120V, 60Hz
    Manufacturer: Polyscience Corp
    PolyScience Circulating Baths are as precise as they are reliable. Every product comes equipped with innovative proprietary features, from the quiet, energy-efficient heat removal of our WhisperCool™ Environmental Control System to the fast-acting temperature control of Cool Command™ Technology. Our Circulating Baths are easy to use, offering interface controller flexibility, clear navigational buttons and menu prompts, ergonomic design for easy repositioning and simple fluid connections. These hard-working machines were designed to make your life easier and more productive. (1 per EA)
    Learn More
    was $8,826.00 Special Price $8,278.79
  24. Immersion Probe Cooler, IP-35 1.75” Ø Rigid Coil Probe, (-35° to +40°C), 240V, 50Hz
    Manufacturer: Polyscience Corp
    Key Features: Continuous cooling to temperatures as low as -100°C Designed to run at maximum cooling An economical alternative to dry ice or liquid nitrogen Excellent for trapping applications, freeze drying, and rapidly cooling small volumes of liquids (1 per EA)
    Learn More
    was $3,928.00 Special Price $3,684.46
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