TA air temperature sensor
- Manufacturer: Nesa
- Category: Meteorology – Climatology, SENSORS, Temperature sensors, Temperature - Humidity
The NESA TA is an air temperature sensor with a Pt100 platinum element 1/3DIN (100 Ω @ 0 °C), typical measuring range of -40 ÷ +60 °C and anti-radiation shelter compliant with WMO and EN 15518-3:2011.
The resistance variation of the Pt100 probe, according to DIN 43760 1/3DIN, is supplied directly with a 4-wire connection (TA-N / TAV-N version) or converted into a standardized signal in voltage 0–2Vdc (TA-A / TAV-A), current 4–20mA (TA-B / TAV-B), or RS485 / ModBus RTU digital bus (TA-C / TAV-C). The sensing element is housed within a set of screens with a reflective white coating that protects against direct sunlight and UV radiation, with either natural ventilation (TA code) or forced ventilation (TAV code).
Key points
- Platinum Pt100 resistance thermometer (100 Ω @ 0 °C) according to DIN 43760 1/3DIN (±0.1 °C @ 0 °C)
- Resolution of 0.01 °C and response time of less than 10 s
- Anti-radiation screens with natural (TA) or forced (TAV) ventilation in accordance with WMO and EN 15518-3:2011
- Available outputs: 4-wire Pt100 (N), 0÷2Vdc (A), 4÷20mA (B) and RS485 / ModBus (C)
- Aluminum alloy with stainless steel screws
Technical Frequently Asked Questions
What output signals does the TA air temperature sensor deliver?
It is supplied factory pre-configured in four output versions: N (4-wire natural Pt100, 100 Ω @ 0 °C), A (0÷2Vdc voltage for -40…+60 °C), B (4÷20mA non-self-powered current for -40…+60 °C) and C (RS485 Half duplex digital interface with ASCII request xxxCR (xxx = 3-digit sensor ID) or ModBus RTU function 0x03 in registers 40002 – 40003 in IEEE754 32-bit format at 9600 baud, 8N1).
How do I order the TA air temperature sensor?
The order code combines the model (TA with natural ventilation or TAV with forced ventilation), the outlet (A, B, C, or N), the sensor-datalogger cable (05 = CS05 of 5 m, 10 = CS10 of 10 m, xx* = CSxx, length in meters to be specified in the order), and the SSU bracket with a length of L = 700-750 mm. Manufacturer example: TA C 10 SSU. The model references are TA-N, TA-A, TA-B, TA-C, TAV-N, TAV-A, TAV-B, and TAV-C.
Under what environmental conditions does the TA air temperature sensor operate?
It operates at temperatures of -60 ÷ +80 °C, relative humidity of 0÷100% and wind speeds up to 50 m/s (gusts up to 60 m/s), with protection against polarity reversal and transients.
Properties
| Feature | Specification |
|---|---|
| Measurement and sensitive element | |
| Measured magnitude | Air temperature |
| Typical measurement range | -40 to +60 °C |
| Safety range | -40 to +60 °C |
| Transducer type | Platinum resistance thermometer Pt100 1/3 DIN (100 Ω @ 0 °C) |
| Standard of the sensitive element | DIN 43760 class 1/3 DIN |
| Precision | DIN 43760 1/3 DIN (±0.1°C @ 0°C) |
| Resolution | 0.01 °C |
| Linearity in temperature | 0.2 °C |
| Temperature repeatability | 0.1 °C |
| Response time | < 10 s (63% of the variation) |
| Ventilation | Natural (code TA) or forced (code TAV) |
| Regulatory compliance | WMO · EN 15518-3:2011 · CE |
| Output signals and interface | |
| Standard output signal (N version) | 4-wire natural Pt100 (100 Ω @ 0 °C) |
| Voltage output (version A) | 0÷2Vdc (-40…+60 °C; °C = (V · 100) / 2 – 40) |
| Current output (version B) | 4÷20mA (-40…+60 °C; °C = (100 · (mA – 4)) / 16 – 40) |
| Digital output (version C) | RS485 Half duplex (ASCII request xxxCR, xxx = 3-digit sensor ID) or RS485-MODBUS RTU (function 0x03, registers 40002 – 40003 IEEE754 32 bits) |
| RS485 communication parameters | 9600 baud, N parity, 8 data bits, 1 stop bit |
| Output impedance | 60÷200 Ω |
| Power supply, environment, and mechanical data | |
| Feeding | 10÷30Vdc |
| Consumption | Typical < 0.1 W · Maximum 2 W @ 12Vdc (TAV mod., forced ventilation) |
| Electrical protections | Against polarity reversal and transients |
| Operating conditions | -60 to +80 °C; humidity 0 to 100%; wind 50 m/s (gusts of 60 m/s) |
| Construction material | Aluminum alloy, stainless steel screws |
| Dimensions | Ø 162 mm; height 220 mm |
| Weight | 700 g |
| Connector protection rating | IP68 |
| Reference | Configuration |
|---|---|
| TA-ATAA | Model: TA · Ventilation: Natural · Output signal: 0÷2Vdc (-40 ÷ +60 °C) |
| TA-BTAB | Model: TA · Ventilation: Natural · Output signal: 4÷20mA (-40 ÷ +60 °C) |
| TA-CCT scan | Model: TA · Ventilation: Natural · Output signal: RS485 / ModBus RTU |
| SOSO | Model: TA · Ventilation: Natural · Output signal: Pt100 1/3 DIN (100 Ω @ 0 °C) 4-wire |
| TAV-ATAVA | Model: TAV · Ventilation: Forced · Output signal: 0÷2Vdc (-40 ÷ +60 °C) |
| TAV-BTAVB | Model: TAV · Ventilation: Forced · Output signal: 4÷20mA (-40 ÷ +60 °C) |
| TAV-CTAVC | Model: TAV · Ventilation: Forced · Output signal: RS485 / ModBus RTU |
| TAV-NTAVN | Model: TAV · Ventilation: Forced · Output signal: Pt100 1/3 DIN (100 Ω @ 0 °C) 4-wire |
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