How Double Points Bimetal Thermometers Function
Double points bimetal thermometers utilize a coiled bimetallic strip that expands or contracts with temperature changes. This mechanical action rotates the pointer while simultaneously activating preset electrical contacts. When temperature reaches predetermined thresholds, these contacts trigger alarms or control systems, making them ideal for industrial safety applications.
Key Advantages of Dual-Contact Thermometers
Critical Applications Requiring Double Points Bimetal Thermometers
These instruments provide dual-setpoint functionality where both high and low-temperature limits must be monitored simultaneously. The dual-contact mechanism ensures immediate response to temperature excursions, preventing equipment damage and maintaining process stability in HVAC systems, food processing, and manufacturing environments.
Installation and Calibration Procedures
Proper mounting orientation and stem immersion depth significantly impact measurement accuracy. Regular calibration against certified references maintains ±1% full-scale accuracy. The rugged stainless steel construction ensures reliable performance in vibrating or corrosive environments.
Common Industrial Applications
From chemical processing plants to pharmaceutical manufacturing, these thermometers deliver critical temperature monitoring where failure isn’t an option. They’re particularly valuable in batch processes requiring precise temperature windows and automated shutdown sequences.
Maintenance and Troubleshooting Tips
Periodic verification of electrical contact resistance and pointer alignment ensures consistent operation. Common issues include contact welding from electrical overload and calibration drift from mechanical stress. Most problems can be resolved without removing the instrument from service.
Frequently Asked Questions
What distinguishes double-point from single-point bimetal thermometers?
Double-point versions provide two independent setpoints for complex control scenarios, while single-point units offer basic switching at one temperature value.
Can these thermometers withstand harsh industrial environments?
Yes, with IP65-rated enclosures and all-stainless steel construction, they perform reliably in demanding conditions including moisture, dust, and corrosive atmospheres.
How frequently should calibration be performed?
Annual calibration is recommended for most applications, though critical processes may require quarterly verification depending on usage intensity and environmental factors.
Upgrade Your Temperature Monitoring Today
Discover how Double Points Bimetal Thermometers can enhance your operational safety and process control. Contact our engineering team for application-specific recommendations and immediate technical support.