Julabo SD20R-30-A11B Refrigerated Circulator for Laboratory Temperature Control (-30 to 200 °C, 20 L)
- Set and read to 0.1°C
- 170°C maximum temperature
- ±0.04°C temperature stability
The Refrigerated Circulator 20 Liter, -30°C
This refrigerated circulator is a state-of-the-art laboratory device designed for precise thermal control in research, industrial, and educational settings. Studies in laboratory thermoregulation highlight the importance of accurate and stable temperature control for chemical reactions, material testing, and biological experiments. Customers and peer-reviewed industry articles consistently praise this model for its reliability, ease of use, and robust performance. Popular applications include circulating cooling liquids for chemical baths, temperature-sensitive experiments, and process testing, with users noting its quick response, low noise, and consistent stability as key advantages.
Extremely easy to use and maintain, this circulator combines design innovation with highly intuitive operation to deliver convenient and reliable liquid temperature control across a broad range of applications. Its dual-speed pump and Cool Command™ features ensure rapid cooling from elevated temperatures while maintaining precise thermal management.
Precision Temperature Control
With a setting and reading capability of 0.1°C, a maximum temperature of 170°C, and a temperature stability of ±0.04°C, the Standard Digital Temperature Controller offers a cost-effective and dependable solution for laboratory applications, including closed-loop external circulation.
Connectivity and Data Logging
RS232 serial communication capability enables full control and data logging via a PC or other remote devices, allowing for seamless integration into laboratory workflows.
Intuitive Operation
Plain-text prompts and an intelligent touch and scroll display guide users quickly through setup. This makes both large and fine set-point adjustments easy and efficient.
Safety Features
User-settable high-temperature safety provides protection against over-temperature and low-liquid-level conditions. Adjustable high and low limits prevent unintended set-point changes, ensuring safe operation at all times.
Refrigerated Circulator 20 Liter - Specifications
Capacity: 20 liters
Minimum Temperature: -30°C
Maximum Temperature: 170°C
Temperature Stability: ±0.04°C
Resolution: 0.1°C
Pump: Dual-speed
Cooling Feature: Cool Command™ for rapid temperature decrease
Connectivity: RS232 for control and data logging
Safety: User-set high-temperature cutoff, low-liquid-level protection, adjustable high/low limits
In applications where precise thermal regulation and controlled fluid environments are critical, complementary circulator models can extend operational flexibility across laboratory and industrial processes.
For smaller‑volume tasks or auxiliary setups, the Refrigerated Circulator 15 Liter ‑30°C delivers robust temperature management with intuitive controls and stable performance from cooling through elevated set points.
When compact footprint and moderate cooling capacity are required for benchtop workflows, the MX 07R‑20 7 Liter Refrigerated Circulator integrates MX temperature control for reliable, repeatable fluid conditioning.
For systems that benefit from integrated heating and cooling with advanced MX temperature controller functionality and scalable reservoir sizing, the MX 15R‑30 15 Liter Refrigerated Circulator provides a versatile solution for a breadth of thermal workflows.
Q&A
What is the maximum cooling capacity of this circulator?
The circulator can cool liquids down to -30°C and heat up to 170°C, making it suitable for a wide range of laboratory applications.
Can I control the circulator remotely?
Yes, RS232 serial communication allows full control and data logging via a PC or other compatible devices.
How precise is the temperature control?
The circulator offers a reading and setting resolution of 0.1°C, with a temperature stability of ±0.04°C for highly accurate control.
What safety features are included?
User-settable high-temperature cutoff, low-liquid-level protection, and adjustable high/low limits guard against unintended changes and ensure safe operation.
Is it suitable for closed-loop external circulation?
Yes, the dual-speed pump and stable temperature control make it ideal for closed-loop external circulation setups in laboratories.
| Temperature Control Type | Standard digital |
| Product Weight | 130 lbs (58.9 kg) |
| Approvals | RoHS, WEEE, ETL, Flammability Class (DIN 12876-1) I (NFL) |
| Product Length | 24" (61 cm) |
| Product Height | 26.9" (68.3 cm) |
| Bath Volume | 5.28 gal (20 L) |
| Connector Type(s) | 0.25" (6.35 mm) female NPT, RS-232 serial output |
| Power Requirements | 120 VAC, 60 Hz, 1 Ph, 13 A |
| Product Width | 16.6" (41.9 cm) |
| Product Type | Refrigerated Circulator |
| Application(s) | Cooling |
| Working Temperature Range | -22 to 338°C (-30 to 170°C) |
| Temperature Stability | ±0.08°F (±0.04°C) |
| Heating Capacity | 1,100 W |
| Cooling Capacity | 165 W at -4°F (-20°C); 505 W at 32°F (0°C); 915 W at 68°F (20°C); 915 W at -212°F (100°C) |
| Pump Flow Rate | 2.9 GPM (11 LPM) |
| Refrigerant Type | R404a |
| Price | $USD 5,845.00 |
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