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Honeywell LF00, LF10, LF20 Duct Temperature Sensor

Honeywell Temperature Sensor

These immersion and air-duct temperature sensors can be employed for hot and cold water as well as for air-duct applications in systems using Pt 1000, NTC 10k, or NTC 20k temperature sensing elements. The sensors with a stainless steel immersion well are also suitable for registering potable water temperature.

LF00, LF10, LF20 Duct Temperature Sensor Honeywell
LF00, LF10, LF20 Duct Temperature Sensor Honeywell

LF Duct Temperature Sensor Features 

  • Pt 1000, NTC 10k, or NTC 20k temperature sensing element
  • Wide sensing range
  • High accuracy
  • Choice of three different probe lengths: 65, 150, 300, and 400 mm
  • Models available with either IP54 or IP65 rating
  • Bayonet ¼ turn cover screws for fast installation
  • External mounting holes, no need to remove cove

Specification

Nominal value

  • Pt 1000: 1000 ? at 0 ?C (32 ?F)
  • NTC 10k: 10 k ? at 25 ?C (77 °F)
  • NTC 20k: 20 k ? at 25 ? C (77 °F)

Accuracy

  • Pt 1000 (IEC751 Class B): ±0.3 K at °C (32 °F)
  • NTC 10k, NTC 20k: ±0.2 K at 25 °C (77 °F)

Sensitivity

  • Pt 1000        ? 3.85 ?/ K (linear)
  • NTC 10k      ?440 ? / K at 25 °C (non-linear)
  • NTC 20k      ?934.5 ? / K at 25 °C (non-lin.)
  • Time constant ?63  < 30 s using brass / stainless steel immersion well
  • < 1 min, duct sensor at 3 m/s air velocity

NOTE: See also Temperature Sensors / TemperatureResistance Curves – Product Data (EN0B0476GE51).

Electrical connection

  • Connection: terminals for 2 x 1.5 mm² cable
  • Cable gland: M16x1.5, UL 94-V2
  • Ambient limits (housing)
  • Storage temperature: -30…+70 °C (-22…+158 °F)
  • Humidity: 5…95% rh, non-condensing
  • Safety (terminal box)
  • Protection class: IP54 / IP65 as per EN 60529
  • Flame retardant: UL94-V0 rated plastic enclosure Tmax = 120 °C (enclosure)

SPECIFICATION

  • Operating temperature: -40 … +150 °C
  • Humidity: 5…95% rh, non-condensing

Material

  • WB: brass, nickel-plated tube: CuZn37-CW508L
  • (Ms63) nipple: CuZn39Pb3 (Ms58)
  • WS: Stainless steel tube: 1.4571 / 316Ti nipple: 1.4404 / 316L

Source : buildings.honeywell.com

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