Hotplate Magnetic Stirrer BS Series
Hotplate magnetic stirrers in four models: 120 or 170 mm coated cast-aluminum plates (BS-2H, BS-3H) or 190 mm ceramic plates (BS-4H, BS-4HC with PT100 sensor).
They stir 2 or 5 L at up to 2000 rpm and heat to 380 °C (BS-4HC 350 °C), with stepless control.
Louise Corscadden, PhD
Director of Science · ConductScience
Ask Louise about Hotplate Magnetic Stirrer BS Series fit, setup, configuration, or quote prep.
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Key Specifications
Full details →- Automation Level
- Manual
- Power/Voltage
- AC110/220V±10%, 50/60Hz
- Sizing
- BS-2H: 120 mm aluminum plate: Work plate 120 × 120 mm · Plate material Coated cast aluminum; BS-3H: 170 mm aluminum plate: Work plate 170 × 170 mm · Plate material Coated cast aluminum; BS-4H: 190 mm ceramic plate: Work plate 190 × 190 mm · Plate material Ceramic; BS-4HC: 190 mm ceramic plate, PT100 sensor: Work plate 190 × 190 mm · Plate material Ceramic
- Model fit
- 4 selectable configurations
- SKU family
- BIO-0801
- Ordering
- Online checkout and quote request available
Hotplate magnetic stirrers that heat and stir at the same time, with stepless adjustment of heating power and stirring speed. The range has four models: two with coated cast-aluminum plates (BS-2H and BS-3H) and two with 190 × 190 mm ceramic plates (BS-4H and BS-4HC). Every model comes with an adjustable rack and a stirrer bar, and the BS-4HC also includes a PT100 temperature sensor.
Which model to choose
- BS-2H, compact aluminum plate (120 × 120 mm): stirs up to 2 L at 100–2000 rpm and heats the plate to 380 °C on 180 W, in a 200 × 120 × 90 mm body. Plate load 3 kg.
- BS-3H, larger aluminum plate (170 × 170 mm): stirs up to 5 L at 100–2000 rpm and heats to 380 °C on 500 W. Plate load 10 kg.
- BS-4H, ceramic plate (190 × 190 mm): stirs up to 5 L at 200–2000 rpm and heats to 380 °C on 600 W. Plate load 10 kg. The enclosed hot plate has flame protection and warms up fast.
- BS-4HC, ceramic plate with PT100 sensor: the BS-4H's 190 × 190 mm ceramic plate, 5 L capacity and 200–2000 rpm, with a PT100 temperature sensor included as standard. Heats to 350 °C.
Standard accessories
Adjustable rack and stirrer bar with every model; PT100 sensor with the BS-4HC. Power supply: AC 110/220 V ±10%, 50/60 Hz.
How It Works
A heating element under the work plate heats the plate while a motor-driven magnet below it turns a stirrer bar inside the vessel, so a sample is heated and stirred at the same time. Heating power and stirring speed are both adjusted steplessly rather than in fixed steps.
The BS-2H and BS-3H have coated cast-aluminum plates, 120 × 120 mm and 170 × 170 mm. The BS-4H and BS-4HC have a 190 × 190 mm ceramic plate on an enclosed hot plate with flame protection. Maximum plate temperature is 380 °C (350 °C on the BS-4HC). Stirring runs at 100–2000 rpm on the aluminum-plate models and 200–2000 rpm on the ceramic-plate models.
The BS-4HC comes with a PT100 temperature sensor, a platinum resistance thermometer, as standard.
Features & Benefits
Sizes by model
| Measurement | BS-2H: 120 mm aluminum plate | BS-3H: 170 mm aluminum plate | BS-4H: 190 mm ceramic plate | BS-4HC: 190 mm ceramic plate, PT100 sensor |
|---|---|---|---|---|
| Work plate | 120 × 120 mm | 170 × 170 mm | 190 × 190 mm | 190 × 190 mm |
| Plate material | Coated cast aluminum | Coated cast aluminum | Ceramic | Ceramic |
| Max. stirring capacity | 2 L | 5 L | 5 L | 5 L |
| Speed range | 100-2000 rpm | 100-2000 rpm | 200-2000 rpm | 200-2000 rpm |
| Heating temperature | 380 °C | 380 °C | 380 °C | 350 °C |
| Power | 180 W | 500 W | 600 W | 600 W |
| Plate load | 3 kg | 10 kg | 10 kg | 10 kg |
| External size (W × D × H) | 200 × 120 × 90 mm | 265 × 185 × 190 mm | 320 × 190 × 125 mm | 320 × 190 × 125 mm |
| Shipping box (W × D × H) | 250 × 180 × 120 mm | 280 × 210 × 220 mm | 390 × 240 × 230 mm | 390 × 240 × 230 mm |
| Net weight | 1.9 kg | 2.2 kg | 5 kg | 5 kg |
| Gross weight | 3 kg | 3.4 kg | 6 kg | 6 kg |
Notes
- BS-2H: 120 mm aluminum plate: Adjustable rack and stirrer bar included
- BS-3H: 170 mm aluminum plate: Adjustable rack and stirrer bar included
- BS-4H: 190 mm ceramic plate: Adjustable rack and stirrer bar included
- BS-4HC: 190 mm ceramic plate, PT100 sensor: PT100 sensor, adjustable rack and stirrer bar included
| Specification | BS-2H | BS-3H | BS-4H | BS-4HC |
|---|---|---|---|---|
| Work plate | 120 × 120 mm | 170 × 170 mm | 190 × 190 mm | 190 × 190 mm |
| Plate material | Coated cast aluminum | Coated cast aluminum | Ceramic | Ceramic |
| Plate load | 3 kg | 10 kg | 10 kg | 10 kg |
| Max. stirring capacity | 2 L | 5 L | 5 L | 5 L |
| Speed range | 100–2000 rpm | 100–2000 rpm | 200–2000 rpm | 200–2000 rpm |
| Heating temperature | 380 °C | 380 °C | 380 °C | 350 °C |
| Power consumption | 180 W | 500 W | 600 W | 600 W |
| External size (W × D × H) | 200 × 120 × 90 mm | 265 × 185 × 190 mm | 320 × 190 × 125 mm | 320 × 190 × 125 mm |
| Package size (W × D × H) | 250 × 180 × 120 mm | 280 × 210 × 220 mm | 390 × 240 × 230 mm | 390 × 240 × 230 mm |
| Net weight | 1.9 kg | 2.2 kg | 5 kg | 5 kg |
| Gross weight | 3 kg | 3.4 kg | 6 kg | 6 kg |
| PT100 sensor | Not included | Not included | Not included | Standard |
| Power supply | AC 110/220 V ±10%, 50/60 Hz | AC 110/220 V ±10%, 50/60 Hz | AC 110/220 V ±10%, 50/60 Hz | AC 110/220 V ±10%, 50/60 Hz |
| Standard accessories | Adjustable rack, stirrer bar | Adjustable rack, stirrer bar | Adjustable rack, stirrer bar | Adjustable rack, stirrer bar, PT100 sensor |
| Control | Stepless heating power and stirring speed; heating and stirring at the same time | Stepless heating power and stirring speed; heating and stirring at the same time | Stepless heating power and stirring speed; heating and stirring at the same time | Stepless heating power and stirring speed; heating and stirring at the same time |
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Plate options | 120 or 170 mm coated cast aluminum, or 190 mm ceramic | One plate size and material per product | Pick the surface and size for your vessels within one range |
| Stirring capacity | 2 L (BS-2H) or 5 L | 1–2 L on many compact hotplate stirrers | 5 L batches on the larger models |
| Speed | Up to 2000 rpm | 1100–1600 rpm on many entry-level units | Faster mixing when you need it |
| Plate temperature | Up to 380 °C (BS-4HC 350 °C) | 250–320 °C on many compact units | Higher plate temperature for faster heating |
| Temperature sensor | PT100 sensor included with the BS-4HC | Probe sold separately | No extra probe to order |
| Accessories | Adjustable rack and stirrer bar included | Support rod or stir bar sold separately on some units | Ready to use out of the box |
Choose the BS-2H for compact work up to 2 L, the BS-3H for 5 L on an aluminum plate, the BS-4H for the larger 190 mm ceramic plate, and the BS-4HC when you also want a PT100 temperature sensor included.
| Model | Size | SKU | Listed price | Status | Shipping box |
|---|---|---|---|---|---|
| BS-2H: 120 mm aluminum plate | Work plate 120 × 120 mm · Plate material Coated cast aluminum · Max. stirring capacity 2 L · Speed range 100-2000 rpm | BIO-0801-BS-2H | $347.99 | Available | 25 × 18 × 12 cm |
| BS-3H: 170 mm aluminum plate | Work plate 170 × 170 mm · Plate material Coated cast aluminum · Max. stirring capacity 5 L · Speed range 100-2000 rpm | BIO-0801-BS-3H | $449.99 | Available | 28 × 21 × 22 cm |
| BS-4H: 190 mm ceramic plate | Work plate 190 × 190 mm · Plate material Ceramic · Max. stirring capacity 5 L · Speed range 200-2000 rpm | BIO-0801-BS-4H | $511.99 | Available | 39 × 24 × 23 cm |
| BS-4HC: 190 mm ceramic plate, PT100 sensor | Work plate 190 × 190 mm · Plate material Ceramic · Max. stirring capacity 5 L · Speed range 200-2000 rpm | BIO-0801-BS-4HC | $660.99 | Available | 39 × 24 × 23 cm |
Practical Tips
Center the vessel on the plate and use a stirrer bar about half to two-thirds of the vessel's base diameter.
Why: A matched bar stays coupled to the drive magnet and spins smoothly.
Start stirring at low speed and raise it gradually.
Why: Ramping up keeps the bar from decoupling and jumping.
Use borosilicate glass or other heat-resistant vessels, never heat sealed containers, and keep flammable solvents off the hot plate.
Why: Thermal shock, pressure build-up and solvent vapors are the main hot-plate hazards.
The plate stays hot after switching off; let it cool before touching, cleaning or moving the unit.
Why: Prevents burns.
Keep the plate clean and dry, and wipe spills once the plate has cooled.
Why: Residue can burn onto the plate and reduce heat transfer.
If you immerse the PT100 sensor in the sample, keep it clear of the stirrer bar and the vessel walls.
Why: Contact with the bar or glass gives false readings and can damage the sensor.
Setup Guide
What’s in the Box
- Hotplate magnetic stirrer (BS-2H, BS-3H, BS-4H or BS-4HC)
- Adjustable rack
- Stirrer bar
- PT100 sensor (BS-4HC only)
Warranty
ConductScience provides a standard 1-year manufacturer warranty covering defects in materials and workmanship. Technical support includes calibration guidance and troubleshooting assistance for optimal laboratory performance.
Which model do I need?
Match the plate to your largest vessel and volume. The BS-2H (120 × 120 mm aluminum plate) stirs up to 2 L. The BS-3H (170 × 170 mm aluminum plate) and the BS-4H (190 × 190 mm ceramic plate) stir up to 5 L. Choose the BS-4HC if you want a PT100 temperature sensor included.
What is the difference between the aluminum and ceramic plates?
The BS-2H and BS-3H have coated cast-aluminum plates. The BS-4H and BS-4HC have ceramic plates, the largest work surface in the range at 190 × 190 mm, on an enclosed hot plate with flame protection.
How hot does the plate get?
Up to 380 °C on the BS-2H, BS-3H and BS-4H, and 350 °C on the BS-4HC. Heating power is adjusted steplessly.
What stirring speeds are available?
100–2000 rpm on the BS-2H and BS-3H, and 200–2000 rpm on the BS-4H and BS-4HC, adjusted steplessly.
Can I heat and stir at the same time?
Yes. Heating and stirring run at the same time, with stepless adjustment of heating power and stirring speed.
What comes with it?
An adjustable rack and a stirrer bar with every model. The BS-4HC also includes a PT100 sensor.
What does the PT100 sensor on the BS-4HC do?
It is a platinum resistance temperature sensor, supplied as standard with the BS-4HC. If your protocol depends on measuring or controlling the sample temperature, contact us and we will confirm how it connects and reads out on the unit.
What power does it need?
AC 110/220 V ±10%, 50/60 Hz. Power consumption is 180 W (BS-2H), 500 W (BS-3H) and 600 W (BS-4H and BS-4HC).
How much weight can the plate hold?
3 kg on the BS-2H and 10 kg on the BS-3H, BS-4H and BS-4HC.
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Accessories
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