Cold Bath
Cold Bath Low temperature bath applications. Stable refrigeration performance for repeatable results. Ideal for Temperature sensor. ISO/IEC 17025 compliant.
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
- Designed for low temperature bath applications
- Stable refrigeration performance for repeatable results
- Suitable for sample cooling and conditioning
- Durable construction for long-term lab use
- Custom temperature ranges available (model dependent)
Key Features
- Four Model Range: L-CRIO-100 (-100°C to +40°C, ±0.005°C) | L-ULT-80 (-80°C to +60°C, ±0.010°C) | L-REF-30 (-30°C to +100°C, ±0.015°C) | L-OIL-270 (ambient to +270°C, ±0.020°C)
- Dual-Stage Cascade Refrigeration: Achieves -100°C deep cryogenic temperatures with exceptional stability — enables calibration of aerospace and research cryogenic sensors
- High-Torque Variable-Speed Stirrer: Vertical laminar flow prevents mixing turbulence and thermal gradients — achieves ±0.010–0.030°C uniformity across the calibration volume
- 10–15 Simultaneous Sensor Capacity: Calibrate RTDs, thermocouples, NTC thermistors, and data loggers in one run — vs. 2–3 sensors typical in dry-block calibrators
- Vacuum-Insulated Observation Port: Frost-free viewing windows in cryogenic models allow real-time sensor monitoring without condensation during overnight unattended calibration runs
- Intelligent Level Control: Automatic monitoring prevents oil expansion overflows, dry-run pump damage, and unplanned shutdown during thermal cycling
- NABL Calibration Ready: ISO/IEC 17025 uncertainty budget pre-certified; RS-232 / Modbus TCP output for LIMS integration
- Primary Standard Recognition: Full sensor immersion in temperature-stable liquid provides superior calibration accuracy vs. point-contact dry blocks
Applications
- Temperature Sensor Calibration: RTDs, thermocouples (all types), NTC thermistors, PT100/PT1000 — simultaneous multi-sensor calibration in a single run
- Industrial Thermometer Verification: Process thermometers, digital indicators, and temperature transmitters for QMS compliance
- Data Logger & Temperature Indicator Calibration: Traceable calibration for ISO 9001 and IATF 16949 measurement system requirements
- Pharmaceutical & Food Safety Testing: Temperature-controlled environment validation; cold chain instrument calibration
- Aerospace & Defence Sensor Certification: Cryogenic sensor calibration for avionics and ground support equipment
- ISO/IEC 17025 Calibration Laboratories: Primary reference standard bath for NABL-accredited laboratory operations
Compliance Standards
- ISO/IEC 17025 — NABL calibration laboratory readiness; uncertainty budget pre-certified
- ITS-90 — International Temperature Scale of 1990 traceability
- NIST Traceability — Through international calibration networks
- ISO 5725 — Measurement Repeatability and Reproducibility
- IEC 61010-1 — Laboratory Equipment Safety
Safety Features
- Compressor protection and overload safety controls
- Temperature alarm protection (model dependent)
- Electrical safety protections for safe operation
Optional Features
- Custom tank size and depth options
- External circulation / pump option (as required)
- Data logging support (as required)
- Calibration certificate support (on request)
How It Works
- Fill the bath tank with appropriate fluid medium
- Set the required low temperature on the controller
- Refrigeration system cools and stabilises bath temperature
- Place samples for controlled cooling or conditioning
- Monitor temperature stability during operation
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
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Related Guides
Continue your evaluation with the most relevant master pages, comparison guides, and technical resources for this product family.
- Dry Block vs Liquid Bath — Compare portability, accuracy, immersion, and temperature coverage.