Tel-Tru Bi-Metal Thermometers ( AA-X75R )

    Model

            “A”’

              “B”

  AA-375R

   2.430” ( 61.72 mm )

   3.187” ( 90.95 mm )

  AA-475R

   2.430” ( 61.72 mm )

   4.115” ( 104.50 mm )

  AA-575R

   2.660” ( 67.56 mm )

   5.040” ( 128.02 mm )

Dial size

AA-375R,  3”Ø (75mm)
AA-475R,  4”Ø (100mm)
AA-575R,  5”Ø (125mm)

Stem diameter

0.250” (6.35mm) standard

Connection

1/2" NPT

External reset

Calibration feature are easy to calibrate by inserting 1⁄16" Allen wrench into reset opening

Hermetic seal

Per ASME B40.3 dustproof and leak-proof

Harness

All stainless steel brackets with screws that loosen to allow 360° rotation of head and 180° adjustment of stem position

Bellows

Heavy-duty flexible stainless steel. Hermetically sealed at case and connection. Protects mechanism that transfers temperature change from bimetal coil to pointer

Dial

True Anti-Parallax dial, easy-to-read from any angle, minimizes reading errors. Anodized aluminum with large black numbers and graduations

Lens

Glass

Bimetal coil

Helix coil is silicone coated on ranges below 500°F for vibration dampening and to maximize heat transfer and response time

Accuracy

±1% full span per ASME B40.3 Grade A. Adjustment of the angle between case and stem may affect accuracy up to 0.5% of span (ASME B40.3).

Over temperature limits

Up to 250°F, 100%;

250°F to 550°F, 50%;

550°F to 1000°F, continuous use up to 800°F, intermittent use over 800°F

           Single

                     Dual

       Celsius ( °C )

 Fahrenheit ( °F )

  Celsius ( °C )

         -75 / 175

    -100 / 100

   -75 / 40

         -70 / 70

     -40 / 160

   -40 / 70

        -50 / 100

       0 / 140

   -18 / 60

         -50 / 25

       0 / 180

   -18 / 82

         -50 / 50

       0 / 220

   -10 / 100

         -40 / 70

       0 / 250

   -20 / 120

         -20 / 120

     20 / 240

   -10 / 110

        -10 / 110

     25 / 125

      -5 / 50

            0 / 50

     50 / 300

     10 / 150

            0 / 60

     50 / 400

       0 / 200

            0 / 80

     50 / 500

     10 / 260

           0 / 100

    150 / 750

     50 / 400

           0 / 150

           0 / 200

           0 / 250

           0 / 300

           0 / 400

           0 / 450

        100 / 400