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121 Direct Mount Thermometer with Flexible Probe

Brand: Qualitrol Company

Side or top mounting bourdon tube thermometers equipped with a 4.5" (114.3 mm) dial face for temperature indication.

Features a swivel probe design that allows for the dial to be angled for more convenient viewing, a reset-able maximum temperature pointer, and up to 3 switches (contacts) for control and alarm functions.

Normally installed in optional well (pocket) that allows units to be replaced or tested without lowering the oil level in the tank or breaking the tank seal.
Features
  • Bourdon tube measurement with reset-able maximum pointer
  • Flexible head for side or top mount applications
  • Up to 2 fully adjustable switches (contacts) and one additional fixed switch for control and alarm functions
  • 5" (130 mm) dial face with an angular dial span of 120 for easy viewing
  • Optimize view of temperature indication with flexible stem
  • Swivel stem provides up to 70 degrees of angular rotation for convenient viewing
  • Vented case design prevents moisture from accumulating under the lens (sealed versions available)
  • The lens is made of clear, UV stabilized, molded polycarbonate for easy, scratch-resistant viewing throughout the life of the unit
  • Equipped with a 4.5" (114.3 mm) dial face for clear temperature indication
  • Control and alarm with up to 4 integrated contacts
  • Available with up to 3 switches for alarm, cooling and/or controlling functions (2 fully adjustable and 1 fixed)
  • Control motors up to 3/4 HP
  • Designed and tested to ensure quality performance
  • A neoprene gasket, integral to the lens and bezel assembly, forms a weather-resistant seal to protect the internal mechanism from the environment
  • Provides accuracy within ±2% of full scale
  • Sealed models are rated to NEMA 6, ensuring protection against the weather
  • The magnetically coupled maximum indicating pointer is integral to the polycarbonate lens, providing easy reset without creating a moisture leak path
  • Rugged, epoxy coated, cast-aluminum housing

Specifications

Accuracy

  • ± 2 % of Dial Range

Ambient Operating Temperature

  • -34° to 60° C (-30° to 140° F)

Bezel

  • Die Cast Aluminum, ASA #70 Light Gray Finish

Case

  • Die Cast Aluminum, ASA #70 Light Gray Finish

Compensation

  • ± 2 % of Dial Range

Dial Diameter

  • 4.5” (114.3 mm)

Dielectric Strength

  • 1,500 Vac for One Minute

Electrical Connectors

  • QUALITROL, Military, ANSI, Flying Leads, Permanently Attached Cable

Gasket Material

  • Neoprene - 40 ± 5 Durometer

Inductive Power Factor

  • 75%

Lens

  • UV Stabilized Polycarbonate

Minimum Spacing Between Switch Settings

  • Recommended to be no less than 4 % of Dial Range

Mounting

  • Side or Top (Case Angle for Viewing is Adjustable)

Mounting Adjustment

  • 30°

Scale Layout

  • 120° Arc (Dial Readability)

Sensor, Probe

  • Brass

Sensor, Probe Diameter

  • 0.481” (12.2 mm)

Sensor, Probe Length

  • 5.812” (147.6 mm)

Standard Dial Range

  • 0° to 250° C (32° to 482° F)

Switch Rating

  • 1.5 A at 48 Vdc, Resistive
  • 1/2 A at 125 Vdc, Resistive
  • 1/4 A at 250 Vdc, Resistive
  • 15 A at 125, 250 & 480 Vac

Switch Repeatability

  • ± 1.250 % of Dial Range (With the Pointer Rotating at a Speed of 25 % of the Dial Range/Minute)

Switch Tolerance

  • ± 2 % of Dial Range (With the Pointer Rotating at a Speed of 25 % of the Dial Range/Minute)

Switch Type

  • SPST or SPDT

Tank Connection

  • 7/8”-14 UNF-2A

Tank Connection Fitting

  • Brass

Well Connection

  • 1/2” NPT Male
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