The PMA2165 is a complete thermocouple probe that is compatible with the PMA2100 Personal Measurement Assistant. The probe comes in two versions, either with J or K type thermocouple.

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FEATURES

• Wide temperature range
• Linearization formula programmed into the sensor
• Excellent long term stability
• Selectable units
• Convenient plastic molded handle
• Interchangeable probes
  
  

APPLICATIONS

• Laboratory and industrial measurements
• Environmental monitoring
• Metallurgy
• Heating and air-conditioning
• Agriculture

> Detectors need to be used with a Radiometer

> Analog version of this detector can be used with any 0 to 5 VDC or 4 to 20mA recording device

The thermocouple element itself is plugged into a socket mounted in an easy to hold plastic handle. The socket accepts both standard OST and subminiature SMP probes. The PMA2165 can be used with any thermocouple of the designated type.

Depending on the material of the thermocouple junction the applicability of the bare thermocouple may be limited due to corrosion. The thermocouple element that comes with the PMA2165 is sealed in a stainless-steel envelope forming an 8" long insertion probe.

The thermocouple operation is based on the Seebeck potential, generated in a broken loop of dissimilar materials when the two joints are at different temperatures. The voltage generated by the thermocouple is a function of the temperature differential between two junctions and the materials used to create the thermocouple (Fig. 1). In general, this function is non-linear, that is the Seebeck coefficient in microVolts/°C is temperature-dependent (Fig. 2). Knowing this function and the voltage generated by the thermocouple, a temperature differential can be calculated. In order to know the absolute temperature of one of the junctions the
temperature of the other one has to be known. In the PMA2165 the reference junction is thermally coupled with a calibrated semiconductor temperature transducer that generates a signal proportional to the temperature. The PMA2100 calculates the thermocouple temperature differential and adds it to the reference
junction temperature.

Some popular combinations of metals forming thermocouples are designated by letters originally assigned by the Instrument Society of America (ISA) and adopted by an American Standard in ANSI MC 96.1. The J-type thermocouple is made of iron and Copper-Nickel while the K-type thermocouple consists of Nickel-Chromium and
Nickel-Aluminum.

Specifications

• Temperature range -200-1260°C (-330-1600°F) - see selection
  guide for applicability
• Temperature accuracy ±2°C
• Stability better than 0.1%/year
• Display resolution 1°
• Units °F, °C, K
• Diameter 1.5" handle, 0.125" sensor
• Length 15" with handle
• Weight 10oz
• Cable  5ft (1.5m)
  
  

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