Thermostat Test Bath
Thermostat test bath for calibration and accuracy verification of temperature switches and bimetals. Ambient to 150°C, ±0.05°C uniformity. Get 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
- Designed for thermostat calibration and accuracy testing
- Stable temperature control for repeatable results
- Uniform bath conditions for consistent performance
- Ideal for production QC and laboratory validation
- Industrial-grade build for long service life
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
- Over-temperature protection for safe operation
- Heater and electrical safety protections
- Insulated design to improve safety and efficiency
Optional Features
- Custom bath sizes and fixture support
- Data logging and test documentation options
- Calibration certificate support (on request)
- Enhanced controller options (as required)
How It Works
- Fill bath with water or suitable fluid medium
- Set the target temperature on the controller
- Allow bath to stabilise and reach uniform temperature
- Test thermostats against reference temperature conditions
- Record switching points and verify accuracy
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.