Rigid Stem Direct Drive Dial Thermometers, 50A & 50AL Series

Description

Palmer filled system Dial thermometers offer uncompromising accuracy.  Engineered to provide a long service life, direct drive dial thermometers are used in many different applications, including power plants, chemical processing, and breweries.

Palmer Dial thermometers feature a direct drive double wound bourdon coil.  The pointer shaft is operated directly from the center coil in this design, eliminating the conventional sector and pinion movement and the multiplying mechanism, both subject to wear and tear and leading to inaccuracy over time. Our direct drive double wound bourdon coil is a unique feature resulting in an extremely responsive temperature indicator that will maintain accuracy for years.  Every Palmer Dial thermometer has an easy to read scale, constructed with high contrast black numerals, graduations, and pointer to minimize reading errors.

Choose between Liquid and Mercury actuated systems.  Liquid actuated systems are filled with non-toxic, non-hazardous, organic liquid that is odorless and non-flammable and has proven to be an excellent replacement for Mercury. Liquid actuated systems are available in temperature ranges up to 500°F or 280°C.

*Mercury is prohibited in some states and countries.  Know your local regulations.

Mercury Free Option

Specifications

Form

Adjustable All-Angle Case

Case

Polished 316 Stainless Steel Case. 5 inch Dial (127 mm).

Fill

50AL: Liquid Actuated < 500°F
50A: Mercury Actuated > 500°F

Dial Face

Black Graduations and Numerals on White Background. Linear Scale with High-Visibility Tapered-Tip Black Pointer.

Bezel

Stainless Steel Bezel Ring

Lens

Standard: Gasket Sealed Glass Cover
Optional: Plexiglass

Fitting

1-1/4 inch UNEF-18 Swivel Nut Nickel Plated Brass.
Optional fittings available.

Stem

.625 inch (15.9 mm) Diameter with Tapered Sensing Bulb.

Stem Material

304 Stainless Steel.

Stem Length

Stem length is measured from below the Swivel Nut fitting.
Standard Lengths:
3.5 inches (89 mm)
6 inches (152 mm)
8 inches (203 mm)
9 inches (229 mm)
12 inches (305 mm)
15 inches (381 mm)
18 inches (457 mm)
24 inches (610 mm)
If stem length over 24 inches is required, please contact customer service for assistance.

Bulb

0.431 inch (11.1 mm) Diameter Tapered Bulb Chamber

Temperature System

Case Compensated System with Double Wound Direct Drive Bourdon Coil.

Accuracy

± 1 scale division

Temperature Ranges

Fahrenheit Ranges:
-100° to 100°F, 2° Scale Divisions, Liquid Actuated
-30° to 130°F, 1° Scale Divisions, Liquid Actuated
30° to 180°F, 1° Scale Divisions, Liquid Actuated
0° to 150°F, 1° Scale Divisions, Liquid Actuated
0° to 240°F, 2° Scale Divisions, Liquid Actuated
0° to 300°F, 2° Scale Divisions, Liquid Actuated
0° to 400°F, 5° Scale Divisions, Liquid Actuated
0° to 500°F, 5° Scale Divisions, Liquid Actuated
0° to 600°F, 5° Scale Divisions, Mercury Actuated
0° to 750°F, 5° Scale Divisions, Mercury Actuated
200° to 750°F, 5° Scale Divisions, Mercury Actuated
200° to 950°F, 5° Scale Divisions, Mercury Actuated
200° to 1200°F, 10° Scale Divisions, Mercury Actuated

Celsius Ranges:
-60° to 40°C, 1° Scale Divisions, Liquid Actuated
-30° to 60°C, 1° Scale Divisions, Liquid Actuated
-10° to 80°C, 1° Scale Divisions, Liquid Actuated
-10° to 120°C, 1° Scale Divisions, Liquid Actuated
-10° to 150°C, 1° Scale Divisions, Liquid Actuated
0° to 220°C, 2° Scale Divisions, Liquid Actuated
0° to 280°C, 2° Scale Divisions, Liquid Actuated
0° to 320°C, 2° Scale Divisions, Mercury Actuated
0° to 400°C, 2° Scale Divisions, Mercury Actuated
100° to 400°C, 2° Scale Divisions, Mercury Actuated
100° to 500°C, 5° Scale Division, Mercury Actuated

Options

Dual Range Scale
Plexiglass Cover
7/8 inch -22 Swivel Nut Fitting
316 Stainless Steel Fitting and Stem