Isotech 820 Large Volume Liquid Calibration Bath

The Isotech 820 Large Volume Liquid Calibration Bath is designed for laboratories that want to calibrate large numbers of temperature sensors simultaneously. Thanks to its generous bath volume, wide temperature range, and excellent stability, the 820 is a cost-effective and reliable solution for both primary and secondary temperature applications. The system is ideal for accommodating multiple sensors, accessories, or standard resistors in a single uniform and controlled environment.

Large volume for maximum flexibility

With an effective calibration chamber of 185 × 140 × 300 mm (approximately 15 liters), the 820 offers enough space to accommodate multiple sensors at the same time. This makes the instrument particularly suitable for laboratories that want to process large batches or use complex setups. The stainless steel, insulated housing guarantees a stable thermal environment, while the robust construction ensures long-term reliability.

Wide temperature range and excellent stability

The 820 supports a temperature range of 30 °C to 200 °C, making the bath suitable for a wide range of industrial and scientific applications. The liquid is heated and mixed homogeneously by a powerful propeller, resulting in excellent temperature uniformity of 0.005 °C at a depth of 100 mm. Absolute stability is ±0.003 °C in water at 50 °C and ±0.020 °C in VH oil at 200 °C. This performance makes the 820 suitable for accurate comparison measurements and stable conditioning of standard resistors.

Easy operation and automation

The 820 comes with a serial interface, PC cable, and software, making it easy to control and monitor the bath. This allows you to program temperature profiles, log data, and integrate the bath into automated calibration processes. Operation is intuitive and designed for daily use in busy laboratory environments.

Applications

The Isotech 820 is suitable for a wide range of temperature metrology applications, including:

> Calibration of PRTs, thermistors, and industrial temperature sensors
> Maintenance of standard resistors at constant temperature
> Comparison measurements with multiple sensors
> Support for accessories such as equalizing blocks and resistor holders

Thanks to its large capacity and excellent uniformity, the bath is ideal for laboratories that want to combine efficiency and reproducibility.

Accessories for optimal performance

Various accessories are available for specific applications, including:

> 820/01 Standard Resistor Holder
> 820/02 Aluminum Equalizing Block
> 820/02S Special Drilling Equalizing Block
> 915 series oils for different temperature ranges
> 932‑19‑72 Standard Resistor Oil

These accessories increase the flexibility of the system and allow the bath to be adapted to a wide range of measurement setups.

Construction and safety

The 820 is built in accordance with CE guidelines and features a sturdy, thermally insulated housing. The liquid container is made of stainless steel for maximum durability and chemical resistance. Despite its large capacity, the instrument remains relatively compact, measuring 240 mm wide, 378 mm deep, and 645 mm high, and weighing only 17 kg.

Energy-efficient and versatile

The bath operates at 1 kW and is available in both 108–130 V and 208–240 V versions, suitable for global laboratory environments. The combination of efficient energy use and high thermal performance makes the 820 a reliable choice for long-term and intensive use.

The Isotech 820 Large Volume Liquid Calibration Bath offers a unique combination of capacity, stability, and versatility. The instrument is ideal for laboratories that want to calibrate large numbers of sensors or maintain standard resistors under controlled conditions. With its robust construction, excellent temperature performance, and extensive accessories, the 820 is a future-proof solution for both primary and secondary temperature metrology.