Low Temperature Bath
Cryogenic liquid calibration bath to −100°C, ±0.005°C stability. Methanol bath for deep-cold RTD and thermocouple calibration. Request a quote.
Liquid calibration baths are precision thermal vessels filled with temperature-stable liquids (ethanol, methanol, oil, water-glycol blends) used to calibrate and verify temperature sensors. The liquid surrounding sensors provides uniform thermal contact—unlike dry blocks that rely on point contact. This makes liquid baths the primary standard for sensor calibration. Indeecon offers four core models covering -100°C to +270°C with stability down to ±0.005°C, meeting ISO/IEC 17025 and NABL calibration laboratory requirements.
Key Specifications
- Temperature range: Ambient to -100°C (model dependent)
- High stability and uniformity for precision calibration
- Suitable for RTDs, thermocouples and temperature probes
- Digital PID control for accurate temperature management
- Reliable cooling performance for laboratory and industrial use
Key Features
- Dual-Stage Cascade Refrigeration: Achieves -100°C for cryogenic applications with exceptional stability
- Precision Stability: ±0.005°C to ±0.020°C across entire temperature range
- Uniform Temperature Distribution: ±0.010-0.030°C uniformity enables simultaneous multi-sensor calibration
- High-Torque Variable-Speed Stirrer: Vertical laminar flow design prevents mixing turbulence and thermal gradients
- Vacuum-Insulated Observation Port: Frost-free viewing windows maintain performance in cryogenic environments
- Large Calibration Capacity: Accommodate 10-15 sensors simultaneously vs. 2-3 in dry blocks
- Intelligent Level Control: Safety circuits prevent oil expansion overflows and dry-run protection
- Temperature Display: Digital readout with 0.1°C resolution across all models
- NABL Calibration Ready: ISO/IEC 17025 uncertainty budget pre-certified
- Dual-Stage Cascade Refrigeration: Advanced cascade refrigeration cycle achieves -100°C deep cryogenic temperatures with exceptional stability, enabling calibration of cryogenic sensors used in aerospace and research applications.
- Advanced Stirring Technology: High-torque, variable-speed stirrer with vertical laminar flow prevents mixing turbulence, ensuring uniform temperature across 10-15 sensors simultaneously—impossible with dry-block systems.
- Vacuum-Insulated Observation Ports: Frost-free viewing windows in cryogenic models allow real-time sensor monitoring without condensation, critical for unattended long-duration calibration runs.
- Intelligent Level Control & Safety: Automatic level monitoring prevents oil expansion overflows, dry-run pump damage, and system shutdown during thermal cycling. Critical for overnight/weekend calibration operations.
- Indeecon combines advanced refrigeration engineering with precision thermal stability. Our cascade refrigeration technology delivers -100°C cryogenic capability, while our variable-speed stirrer ensures uniform distribution. All units come NABL-ready with ISO/IEC 17025 traceability and are backed by comprehensive technical support for laboratory accreditation.
Applications
- Temperature Sensor Calibration (RTD, Thermocouple, NTC, PT1000)
- Industrial Thermometer Verification
- Data Logger & Temperature Indicator Calibration
- Medical Thermometer Testing (Ear, Oral, Infrared)
- Aerospace & Defence Sensor Certification
- Pharmaceutical & Food Safety Testing
- Research Laboratory Experiments
- Educational Demonstrations (Physics, Chemistry)
- ISO/IEC 17025 Calibration Service Labs
Compliance Standards
- ISO/IEC 17025 (NABL Calibration Readiness)
- ITS-90 (International Temperature Scale of 1990)
- NIST Traceability (Through international calibration networks)
- ISO 5725 (Measurement Repeatability & Reproducibility)
- IEC 61010-1 (Laboratory Equipment Safety)
- IS 1286 (Thermometers - General Requirements)
Safety Features
- High / Low temperature protection and alarms
- Overload protection for cooling system components
- Electrical safety protections according to industrial standards
Optional Features
- Custom bath sizes and probe holder configurations
- Data logging and calibration reporting support
- External reference probe integration for high-accuracy requirements
- Alternative bath mediums based on temperature range
How It Works
- Select the required temperature setpoint on the controller
- The cooling system stabilises the bath at the target temperature
- Sensors/probes are placed into the bath for verification
- Readings are compared against reference standards for calibration
- The system maintains stability for the duration of the test/calibration
Datasheets & Resources
- Temperature Range
- Stability / Uniformity
- Stability / Uniformity
- Power Supply
Frequently Asked Questions
What's the difference between L-CRIO-100 and L-ULT-80?
L-CRIO-100 reaches -100°C with ±0.005°C stability for ultra-cryogenic applications. L-ULT-80 reaches -80°C with ±0.010°C stability. Choose based on your lowest required temperature.
Can I calibrate multiple sensor types simultaneously?
Yes. The liquid bath accommodates RTDs, thermocouples, NTC thermistors, and other sensors simultaneously. All immersed sensors stabilize to the same temperature.
How do I avoid oil degradation in the L-OIL-270 model?
Use premium synthetic silicone oils (food-grade or laboratory-grade). Indeecon recommends oil change every 2 years or 2000 hours, whichever comes first. We supply certified oils.
Can the baths be integrated with data logging systems?
Yes. All models feature digital temperature outputs (RS-232 / Modbus TCP available). Integration with LIMS and calibration software is straightforward.
Schedule a Calibration Bath Demonstration
See precision calibration in action—contact our calibration specialists
Related Guides
Continue your evaluation with the most relevant master pages, comparison guides, and technical resources for this product family.
- Calibration Equipment Guide — Dry block calibrators and liquid baths — equipment families, temperature ranges, and selection factors.
- Temperature Calibration Guide — Traceability, uncertainty, and temperature calibration fundamentals.
- Calibration Selection Guide — Select equipment by range, stability, and application constraints.
- Dry Block vs Liquid Bath — Compare portability, accuracy, immersion, and temperature coverage.