Air Temperature Sensor for Indoor and Outdoor Use - Sensor type: Pt1000
Item# (PN): EWSA-PT1000 Shipping and Payment
Designed for Indoor and Outdoor Use. Screw Terminals for 4-Wire Pt100 (Pt1000) Connection. Optional Built in 4 to 20 mA Transmitter. Rugged Sensor and Protection Tube Design. Fitted with M20 Cable Gland for Electrical Connection. More
OMEGA’s rugged air temperature sensors EWSA series offer the perfect solution for temperature monitoring outdoors or in demanding environments. A 6 mm–diameter sheathed RTD (Pt100, Pt1000) probe is housed in the centre of a 12.7 mm outer protection tube which is drilled to improve airflow around the sensor.
A 4-terminal connector block or 4 to 20 mA transmitter are housed in a tough aluminium alloy enclosure rated to IP65. A cable gland is fitted on the opposite side of the enclosure to the sensor, suitable for cables from 2.5 to 6.5 mm diameter.
SPECIFICATIONS:
Dimensions:
Box: 80 W x 75 H x 58 mm D (3 x 2.9 x 2.3")
Sensor: 75 mm long x 12.7 mm OD (2.9 x 0.5")
Cable Entry: M20 Nylon gland for 2.5 to 6.5 mm (0.098 x 0.25") OD cable
EWSA-PT100/PT1000:
Sensor Type: Thin film Pt100 / PT1000 class A 4 wire
Ambient Temperature Range: -50 to 100°C (-58 to 212°F)
Electrical Connection: Screw terminal block
EWSA-PT100-TX:
Ambient Temperature Range: -40 to 85°C (-40 to 185°F) at 10 to 90% RH non condensing
Standard Transmitter Scaling: 4 mA -25°C (-13°F), 20 mA at 75°C (167ºF)
Electrical Connection: Screw terminals, 2-wire
Power Supply: 10 to 30 Vdc, loop powered
Maximum Output Load: [(V supply-10)/20] kΩ eg 700Ω @ 24V
RTD Pt100 vs Thermocouple
It is not practical to compare RTDs (Pt100 and others) and thermocouples generally. However, if we compare their performance in terms of specific criteria, we can see which is best suited for specific applications. Thermocouples are best for working at high temperatures. New manufacturing techniques have improved the measurement range of RTD probes, but more than 90% of RTDs are designed for temperatures below 400°C.
In contrast, some thermocouples can be used at up to 2500°C. Thermocouples are generally cheaper than RTDs...
Origin Story of the RTD / Pt100
The same year (1821) that Thomas Seebeck made his discovery about thermoelectricity (Seebeck effect, see thermocouples), Sir Humphrey Davy announced that the resistivity of metals showed a marked temperature dependence. Fifty years later, Sir William Siemens proffered the use of platinum as the element in a resistance thermometer. His choice proved most propitious, as platinum is used to this day as the primary element in all high-accuracy resistance thermometers, Pt100, Pt1000 etc.
In fact, the Platinum Resistance Temperature Detector, or RTD Pt100, is used today as an interpolation standard from the oxygen point (-182.96°C) to the antimony point (630.74°C)...
What are RTD temperature sensors?
RTDs or Resistance Temperature Detectors, are temperature sensors that contain a resistor that changes resistance value as its temperature changes. The most popular RTD is the Pt100. They have been used for many years to measure temperature in laboratory and industrial processes, and have developed a reputation for accuracy, repeatability, and stability.
Most RTD elements consist of a length of fine coiled wire wrapped around a ceramic or glass core. The element is usually quite fragile, so it is often placed inside a sheathed probe to protect it...
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