Over Molded IP67 Waterproof Strap On Ring TPE NTC Temperature Probe 2MT With Copper Tube For Pipes Clip-on Application
Description
Suitable for measuring on pipes, with thermoplastic rubber case and copper tube it is the best compromise between fast response time and protection degree. Allowing for easy and fast mounting and removal. This probe is customizable on customers' requirements.
APPLICATION FIELDS
Heat Pumps
Heating
Hot water heaters
TECHNICAL DATA
| TEMPERATURE RANGE | (-50+110)°C |
| DEGREE OF PROTECTION | IP67 |
| SENSOR | NTC-PTC-PT100-PT1000-(more sensors are available on request) |
| CASE MATERIAL | Thermplastic rubber and copper |
| CABLE MATERIAL | TPE |
| TERMINALS | Tinned, pins, connectors (other terminals are available on request) |
| RESPONSE TIME | About 15 sec (according to the configuration) |
| MARKING | Laser marking on cable, label ( customizable on request) |
| NTC THERMISTOR | R25:10K±1%, B25/85: 3977±1% |
| HOUSING | 6*20mm Copper plate |
| LEAD WIRE | AWG26*2C TPE Flat (B Type) |
| Dissipation factor | About 2 mW/C |
| Withstanding Voltage(Sec.) | 1500VAC 2Sec. |
| Insulation Resistance(MΩ) | 500VDC, ≧100 |
Size (mm)
5 Types of Temperature Sensors
1. Thermocouple: It is a type of temperature sensor, which is made by joining two dissimilar metals at one end. The joined end is referred to as the HOT JUNCTION. The other end of these dissimilar metals is referred to as the COLD END or COLD JUNCTION. The cold junction is actually formed at the last point of thermocouple material. If there is a difference in temperature between the hot junction and cold junction, a small voltage is created. This voltage is referred to as an EMF (electro-motive force) and can be measured and in turn used to indicate temperature.
2. The RTD is a temperature sensing device whose resistance changes with temperature. Typically built from platinum, though devices made from nickel or copper are not uncommon, RTDs can take many different shapes like wire wound, thin film. To measure the resistance across an RTD, apply a constant current, measure the resulting voltage, and determine the RTD resistance. RTDs exhibit fairly linear resistance to temperature curves over their operating regions, and any nonlinearity are highly predictable and repeatable. The PT100 RTD evaluation board uses surface mount RTD to measure temperature. An external 2, 3 or 4-wire PT100 can also be associated with measure temperature in remote areas. The RTDs are biased using a constant current source. So as to reduce self-heat due to power dissipation, the current magnitude is moderately low. The circuit shown in figure is the constant current source uses a reference voltage, one amplifier, and a PNP transistor.
3.Thermistors: Similar to the RTD, the thermistor is a temperature sensing device whose resistance changes with temperature. Thermistors, however, are made from semiconductor materials. Resistance is determined in the same manner as the RTD, but thermistors exhibit a highly nonlinear resistance vs. temperature curve. Thus, in the thermistors operating range we can see a large resistance change for a very small temperature change. This makes for a highly sensitive device, ideal for set-point applications.
4.Semiconductor sensors: They are classified into different types like Voltage output, Current output, Digital output, Resistance output silicon and Diode temperature sensors. Modern semiconductor temperature sensors offer high accuracy and high linearity over an operating range of about 55°C to +150°C. Internal amplifiers can scale the output to convenient values, such as 10mV/°C. They are also useful in cold-junction compensation circuits for wide temperature range thermocouples. A brief details about this type of temperature sensor are given below.
