The special thin glass coating of the glass NTC thermistor provides hermeticity, making them safe from harsh environments. As a result, the glass encapsulated NTC thermistor is perfect for most low-cost temperature measurements, control, and compensation, such as self-heating applications, including liquid level sensing and gas flow measurement. Read on for more information on glass NTC thermistors.

 

What Is The NTC Thermistor?

This is the first thing you must understand before you can have a deep understanding of the glass NTC thermistor.

NTC stands for "Negative Temperature Coefficient". NTC thermistors are resistors with a negative temperature coefficient that use the resistance characteristics of a ceramic/metal composite material to measure temperature. They are mainly used as ICL (Inrush Current Limiters) to protect circuits of electrical and electronic equipment easily and effectively from inrush currents.

NTC sensors are typically used in the range of -55 to +200°C. Over the operating temperature range, the resistance of NTC thermistors decreases with increasing temperature. As a resistive temperature sensor and current limiting device, its temperature sensitivity coefficient is approximately five times that of silicon temperature sensors (Silistors) and approximately ten times that of resistance temperature detectors (RTDs).
 

Why Choose Glass Encapsulated NTC Thermistor?

Glass encapsulated NTC thermistor, also known as the chip in glass NTC thermistor/CIG NTC thermistor or glass NTC thermistor. In other words, they all refer to the same thing.

In fact, the chip in glass NTC thermistor is a special species of NTC thermistor. By hermetical sealing, these small CIG NTC thermistors eliminate resistance reading errors caused by moisture penetration. Therefore, as mentioned earlier, glass encapsulated NTC thermistor operates effectively at extreme temperatures as well as under harsh environmental conditions.

Furthermore, glass NTC thermistors are not limited by soldering temperature, which allows them to offer the user a wide operating temperature range of -55°C to +200°C. With a diameter of only 1.5 mm, the small size of CIG NTC thermistors allows for packaging in a variety of housings, such as ring lugs and hexagonal nuts.
 

Where Can You Find the Best Glass NTC Thermistor?

Horle glass encapsulated NTC thermistors are produced by fully automatic production lines. We have 5 sets of self-developed production lines with a daily output of 250,000pcs/day. The full series is equipped with a negative temperature coefficient characteristic that provides long-term stability and reliability for many industrial applications.
 

GRT type NTC shape and size

Mode		Glass head size	Working temp	Lead wire OD
DGRT	D1GRT51	Φ2.00	-20℃- +200℃  (silver electrode) -50℃- +300℃  (gold electrode)	0.30±0.015
	D2GRT51	Φ1.60		0.25±0.015
	D3GRT51	Φ1.35		0.20±0.015
	D4GRT51	Φ1.25		0.20±0.015
	D4GRT51	Φ0.80.		0.15±0.015

Our glass NTC thermistors are glass insulates, offering stable characteristics and good uniformity by a fully automatic production line.
 

Characteristics

small size: glass head od to 1.25mm
high-temp resistance: up to 300℃
working temperature: -20℃ to +300℃
lead wire: dumet wire or tin-coated dumet wire
chips electrode: gold electrode / silver electrode
thermal time constant: 10 seconds (in the air)
resistance value: 25℃ KΩ
dissipation constant: 1.3mw/℃ (1.1-1.6mw/℃)
 

Applications

Our glass NTC thermistor has an operating temperature range of -20 to +300 °C, which is one of the most superior performances in its class. With high precision resistance and beta values, the chip in glass NTC thermistor provides lasting stability and reliability for high precision temperature sensing applications. The higher accuracy and faster response make it an effective and economical alternative to RTD probes and thermocouples.

The compact size of the CIG NTC thermistor allows for packaging in a variety of custom housings, making it well-suited for HVAC, air conditioners, mobile phones, refrigerators, industrial temperature controller units, medical, automotive industries, etc.
 

• * Outdoor applications, such as infrared lighting systems
• * Medical applications that rely on airflow, such as respirators
• * Temperature measurement and control commonly used in HVAC applications
• * Industrial applications may include monitoring battery pack end temperatures while under the charge
• * Temperature control of common household appliances, such as coffee makers, ovens, and refrigerators

If you want more information about the glass encapsulated NTC thermistor, please feel free to contact us at engineer@horlechina.com. Our professionals are able to provide the best glass NTC thermistor solution for your projects!