Description
The Mercury Filled Temperature Gauge by Aavad Instrument Pvt. Ltd. is a precision-grade industrial thermometer that uses mercury as the thermometric fluid in a glass capillary and Bourdon tube system, providing highly accurate and responsive temperature readings across a wide range. Mercury’s excellent linear thermal expansion properties and chemical stability make this gauge one of the most precise local temperature indicators, with accuracy superior to gas-actuated or bimetallic types, particularly at mid-to-high temperature ranges.
Mercury-filled temperature gauges have been widely used in various industries and applications, including laboratory experiments, industrial processes, and HVAC systems. However, due to concerns about mercury’s toxicity and environmental impact, the use of mercury-filled gauges has been phased out in many places in favor of digital or alternative types of temperature measurement devices.
Key Features
- Thermometric Fluid: Mercury (Hg) for highly linear, accurate thermal response
- Temperature Range: 0°C to +120°C (mercury solidification and boiling points determine practical limits)
- Dial Size: 100 mm, 150 mm for legible reading in industrial settings
- Dual Scale: °C and °F simultaneous dials available
- Sensing Bulb and Capillary: SS 316 sheathed for protection
- Immersion Length: 50 mm to 500 mm — customized to installation requirement
- Accuracy: ± 1.0% FSD / ± 1.6% FSD — superior to bimetallic and gas-actuated types
- Fast response time due to high thermal conductivity of mercury
- Remote sensing with flexible capillary extensions up to 5 m available
- Thermowell compatible design for high-pressure process protection
- Case Material: SS 304 bayonet bezel with acrylic / shatterproof glass
- Connections: ½” BSP bottom or back entry
- Compliant with IS 13211 standards
- Non-mercury (nitrogen gas / silicone) alternatives available for RoHS compliance
Applications
- High-accuracy temperature measurement in chemical reactors and distillation columns
- Steam and condensate temperature monitoring in power plants
- Precision temperature indication in pharmaceutical autoclaves
- Laboratory and quality control temperature measurement
- Petroleum refinery fractionation column temperature gauging
- Food and beverage pasteurization verification
- Heat transfer fluid temperature monitoring in solar thermal systems
- Calibration reference and standard temperature measurement
- Metallurgical furnace and heat treatment temperature gauging
- Textile and dyeing process temperature monitoring
Datasheet
FAQs
1. What is a Mercury Filled Temperature Gauge?
A Mercury Filled Temperature Gauge is a mechanical temperature measuring instrument that uses a sealed mercury-filled sensing system consisting of a sensing bulb, capillary, and indicating mechanism to provide accurate local or remote temperature indication without requiring an external power supply. It is commonly used for industrial temperature monitoring where electrical instrumentation is not required.
2. How does a Mercury Filled Temperature Gauge work?
As the process temperature changes, the mercury inside the sealed sensing bulb expands or contracts. This change in pressure is transmitted through the capillary tube to the gauge mechanism, which converts it into mechanical movement, causing the pointer to indicate the corresponding temperature on the calibrated dial.
3. What are the advantages of a Mercury Filled Temperature Gauge?
Mercury-filled temperature gauges have historically provided excellent thermal stability, good linearity, repeatable measurement performance, and reliable remote temperature indication over long capillary lengths. Their robust mechanical construction makes them suitable for a wide range of industrial temperature monitoring applications where dependable local or remote indication is required.
