ASPTC-L

Aspirated Thermocouple with Mounts
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ASPTC-L

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Aspirated Thermocouple with Mounts

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Model:
ASPTC-L
Item Number:
8718
Warranty:
1 year
Lead time:
14 days

Overview

ASPTC-L Aspirated Thermocouple w/Mounts

The ASPTC-L consists of a type-E fine-wire thermocouple mounted in a fan-aspirated radiation shield to provide highly accurate air temperature measurements. You can use one ASPTC to measure absolute air temperature, or you can use two ASPTCs to make delta temperature measurements. Often, the ASPTC replaces, or is measured in addition to, the TCBR thermocouples in a Bowen ratio system.

Key Advantages

Highly Accurate Air Temperature
Fine-wire thermocouple in aspirated radiation shield

Technical Description

The ASPTC's radiation shield is an elongated tube constructed from white UV-stabilized polyethylene that provides low thermal conductivity and heat retention. A fan draws air across the measurement junction, which reduces solar loading on the thermocouple. The radiation shield also protects the thermocouple, increasing the thermocouple’s durability.

The ASPTC's fine-wire thermocouple consists of a chromel wire and a constantan wire joined at a measurement junction. A voltage potential is generated when the measurement end of the thermocouple is at a different temperature than the reference end of the thermocouple. The magnitude of the voltage potential is related to the temperature difference. Therefore, temperature can be determined by measuring the differences in potential created at the junction of the two wires.

A reference temperature measurement (typically measured at the data logger wiring panel) is required. Options for measuring the reference temperature include:

  • Thermistor built into the CR6, CR800, CR850, CR1000, or CR3000 wiring panel
  • PRT built into the wiring panel of the CR9050 or CR9051E input module for the CR9000X Measurement and Control System

Benefits

  • Uses fine-wire thermocouple for accurate air temperature measurements
  • Includes aspirated radiation shield
  • High-powered fan reduces solar loading

Specifications

Shield Material
UV-stabilized polyethylene
Large Diameter
5.8 cm

(2.3 in.)

Small Diameter
4.6 cm

(1.8 in.)

Power Cable Diameter
0.5 cm

(0.2 in.)

Signal Cable Diameter
0.3 cm

(0.1 in.)

Length
53.3 cm

(21 in.)

Height
14.7 cm

(5.8 in.)

Weight
0.86 kg

(1.9 lb)

Fan

Air Velocity at Thermocouple
5.5 m/s

(@ 12 Vdc)

Life Expectancy
65,000 h

(@ 30°C)

Current Drain
260 mA

(@ 12 Vdc)

Operating Voltage
9 to 13 Vdc
Operating Temperature Range
-10° to +70°C
Polarity Protection
Reverse polarity protected

Thermocouple

Type
Chromel-Constantan
Typical Output
60 μV/°C
Accuracy
Refer to the Thermocouple Measurement section in the data logger manual.
Diameter
0.0762 mm

(0.003 in.)

Related Resources

Documents

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Corporate Address
815 W 1800 N
Logan, UT 84321
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Email Address
sales@campbellsci.com

As a trusted leader in measurement systems for more than 50 years, our top priority at Campbell Scientific has always been to provide the most accurate, reliable data for research and industry.