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Kele Thermistor and RTD Sensor, ST-A

ST-A Thermistor & RTD Sensor

Brand: Kele
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Kele Thermistor and RTD Sensor, ST-A
The Precon ST-A* Series All-Purpose Thermistor and RTD Sensors provide precision remote temperature sensing for building automation systems and mechanical equipment room instrumentation. 

The active sensing element is made of a highly stable precision thermistor material or platinum RTDs. 

The ST-A* Series sensors are rugged, point-sensitive waterproof sensors featuring a 9" (22.8 cm) 304 stainless steel probe and brass fitting. 

The brass fitting has a 1/2" NPT male thread. 

The sensors are supplied with two 1/2" locknuts for easy installation in handy boxes (or other enclosures with 1/2" knockouts).
Features
  • Lifetime warranty
  • Wide selection of thermistor and RTD curves
  • Tip sensitive for precise temperature response
  • Adaptable with many options
  • All metal construction with 304 stainless steel probe
  • Easy to mount to duct, wall, or back box
  • Waterproof probe

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Specifications

Brand

Accuracy

  • ± 0.03° C (± 0.054° F) - RTD Typical 71
  • ± 0.15° C (± 0.27° F) - RTD Typical 81, 85
  • ± 0.2° C (± 0.36° F) - Thermistor
  • ± 0.30° C (± 0.54° F) - RTD Typical 91
  • ± 0.40° C (± 0.72° F) - RTD Typical 63

Applications

  • Building Automation Systems & Mechanical Equipment Room Instrumentation

Approvals & Certifications

  • CE

Approvals & Certifications

  • Compliance/Conformance

Dissipation

  • Heat: 2.7 mW/°C (Power Needed to Raise the Temperature by 1° C (1.8° F))

Electrical - Free Leads

  • 18” (45 cm) Free Leads - for Typical 71, 81
  • 8 feet (2.4 metres) & 25 feet (7.6 metres) 24 AWG Wire Leads

Element

  • Sensing Element: Platinum RTDs

Enclosure, Body Material

  • Metal Handy Box

Insertion 'U' Length

  • 1” to 108” (2.54 to 274.3 cm) - Probe Insertion Length

Mounting

  • Directly to Duct
  • Immersion Mount: Well
  • Plenum
  • Wall Mounted

NACE & NIST

  • NIST

NPT Connection

  • 1/2” NPT Male

Process Fitting Details

  • Brass

Resistance

  • 2.252 to 100 kiloohms - Thermistor

RTD Type

  • Typical 63: Ni1000
  • Typical 71, 81 & 85: 100 & 1,000 ohms Pt385 Curve
  • Typical 91: 1,000 ohms Pt375 Curve

Sensor, Probe Connection

  • 3-Wire

Sensor, Probe Material

  • 304 Stainless Steel

Sensor, Probe Type

  • RTD
  • Thermistor

Stability

  • ± 0.13° C (± 0.24° F) over 5-Years - Thermistor

Temperature Coefficient

  • Negative Temperature Coefficient - Thermistor
  • Positive Temperature Coefficient - RTD

Temperature Range

  • -40° to 105° C (-40° to 221° F) - Thermistor/RTD

Documentation

Data Sheets

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