Temperature Sensors available from Stock
AMS Technologies’ extensive range of accurate and fast temperature sensors available from stock is essential for precision temperature control and designed to meet almost any temperature measurement requirement. Our NTC thermistor temperature sensor probes provide very high sensitivity, small size and appropriate speed – perfect for use with our temperature controllers.
Various NTC thermistor types with base resistance values from 5 kΩ to 231.5 kΩ are available, ranging from ultraminiature bare bead, epoxy or phenolic resin coated sensors to cylindrical and pipe versions (polyimide, brass, brass nickel, stainless steel – threaded and unthreaded) all the way to flange mount and plate models. Sizes range from 0.5 mm to 16 cm with Teflon coated lead lengths from 5 cm to 45 cm.
Because most of our temperature sensors are interchangeable within the specified temperature or accuracy range, they can be directly replaced with a new one of the same type in the event of damage - with little or no effort to recalibrate the thermal system.
Beyond our general purpose NTC thermistors series and a thermistor series dedicated for use with our range of temperature controllers, AMS Technologies also carries an extensive range of digital output thermopile sensors, detectors, modules and arrays.
These thermopiles offer leading-edge, non-contact temperature measurement for various applications – with some models additionally allowing for motion detection and presence monitoring. Multi-pixel IR thermopile sensors are also available, either as line arrays or 2D modules.
In addition to many standard types, AMS Technologies can also provide customer-specific temperature sensors and probes – please contact the AMS Technologies sensor experts for a temperature sensor solution that matches your project’s requirements.
One application of our temperature sensors is the thermal feedback for our broad range of dedicated TEC temperature controllers that are very well suited for drive and control of thermoelectric coolers (TEC) or thermoelectric modules (TEM) based on Peltier technology. Analog and digital TEC drivers with proportional as well as PID type of control are available.
In addition to temperature sensors, AMS Technologies carries a broad range of further sensor solutions.
Our standard and custom liquid level sensors are designed to manage liquid levels of water, foodstuffs, chemicals and fuels in all sorts of containers and vessels. With a large range of different materials, suitable for use in many fluids including corrosive acids, vertical single- and multi-level sensors are available as well as horizontal sensors and cable-suspended versions.
Our portfolio of flow sensors is used to measure flow rates and often also the total volume of liquids flowing through a specified cross-section. With inline, paddle and ultrasonic flow sensors or switches, AMS Technologies provides solutions for a large number of applications.
A broad range of pressure sensors is available from AMS Technologies, comprising models for gauge and absolute pressure sensing with variants for low pressure ranges as well as pressures of up to 400 bar. Featuring piezo-resistive ceramic technology and a microprocessor-based amplifier, these pressure sensors in a stainless-steel housing provide excellent media compatibility and are suitable for a wide range of industrial applications
Our product range of current sensors includes super high performance, lab-grade current transformers allowing non-contact measurement of currents from Microamperes to 20 Kiloamperes, at frequencies ranging from 0.5 Hz to 500 MHz.
Amongst the different types of temperature sensors, thermistors provide very high sensitivity, small size and appropriate speed. The semiconductor material thermistors are made from shows a large change of its resistance value already for a small change of the temperature it is exposed to.
The term "thermistor" is a short form of "thermally sensitive resistor". NTCs (Negative Temperature Coefficient) and PTCs (Positive Temperature Coefficient) can be distinguished depending on the characteristics of their resistance change with temperature. The main advantage of thermistors is their large operating range of the resistance value, which allows these components to cover a very wide temperature range.
Among the most important properties of a thermistor are its base resistance (in most cases defined at +25°C) and the individual tolerance – important when exchanging the thermistor with an identical model in case of damage. The thermistor’s change of resistance over the defined temperature range is mostly given by the suppler in a detailed temperature-versus-resistance chart.
While thermistors require physical contact to the medium whose temperature is of interest, thermopile sensors allow for indirect, non-contact measurement of temperatures. Thermopile sensors are based on the thermoelectric effect (or Seebeck effect), also known as reverse to the Peltier effect. Applying a temperature difference to two junctions of two dissimilar materials leads to a voltage proportional to this temperature difference.
Fitted with special infrared windows as spectral filters, thermopile sensors work in the mid to far infrared (IR) range without ambient visible light interference. Thermopiles provide a constant voltage output proportional to the net radiation and respond very quickly to radiation changes, allowing to detect fast temperature modulations.
The most important properties of a thermopile sensor are its responsivity, noise, sensitivity, field-of-view and response time. The responsivity (measured in V/W) shows low-pass characteristics. A thermopile detector’s noise (given as RMS value in nV/√Hz) is dominated by the Johnson noise due to its resistance.
Sensitivity is given as a characteristic output voltage versus target temperature at +25°C environment temperature with standard IR filter and different object/blackbody temperatures. Sensitivity is dependent upon the field-of-view of the detector construction. All target points within the field-of-view will contribute to the measurement signal. The field-of-view data describes the dependence of signal from incident angles.
Alternative Terms: Temperature Transducer; Thermistor; NTC Sensor; Thermopile; Thermopile Sensor; Thermopile Detector; Thermopile Array