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Series BT Bimetal Thermometer 2", 3", or 5" Dial, Dual Scale, ±1% FS Accuracy, External Reset

Series BT Bimetal Thermometers offer accurate, reliable service even in the toughest environments. These corrosion resistant units are constructed from stainless steel and are hermetically sealed to prevent crystal fogging. The bimetal element directly drives pointer, eliminating gears and linkage. An external reset screw allows field calibration and easy-to-read aluminum dial minimizes parallax error. Choose back connection, lower connection or adjustable angle for easy viewing and installation. Adjustable models can be rotated a full 360° and tilted over a 180° arc. NOTE: When using in pressurized applications, use a suitable thermowell.
 
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SPECIFICATIONS
Wetted Materials: 304 SS.
Accuracy: ±1% full scale.
Response Time: = 40 seconds.
Temperature Limits: Head: 200°F (93°C). Stem: Not to exceed 50% overrange or 1000°F (538°C) or 800°F (427°C) continuously.
Process Connection: 1/4" NPT on 2" dial size; ½" NPT on 3" or 5" dial size.
Materials of Construction: 304 Stainless Steel stem, glass crystal, anodized aluminum dial, Series 300 Stainless Steel head, bezel, and mounting bushing.
Stem Diameter: 1/4" O.D.
Immersion Depth: Minimum 2" in liquids, 4" in gas.
 
Popular Back Connection Models:
Model Number Dial Size Stem Length Temp Range, °F(°C) Degree Div., °F(°C)
 BTB22551¹ 2", 2-1/2 0/250 2
 BTB2405D 2 0/250(-20/120) 2(2)
 BTB2409D 2 200/1000(100/550) 10(5)
 BTB32510D 3", 2-1/2 0/200 (-20/100) 2 (2)
 BTB3255D 3", 2-1/2 0/250 (-20/120) 2 (2)
 BTB3257D 3", 2-1/2 50/550 (10/290) 5 (5)
 BTB34010D 3", 4" 0/200 (-20/100) 2 (2)
 BTB3405D 3", 4" 0/250 (-20/120) 2 (2)
 BTB3407D 3", 4" 50/550 (10/290) 5 (5)
 BTB3605D 3", 6" 0/250 (-20/120) 2 (2)
1 Model offered in Fahrenheit scale only.
 
Popular Adjustable Angle Connection Models:
Model Number Dial Size Stem Length Temp Range, °F(°C) Degree Div., °F(°C)
 BTA54010D 5", 4" 0/200 (-20/100) 2 (2)
 BTA5405D 5", 4" 0/250 (-20/120) 2 (2)
 BTA5407D 5", 4" 50/550 (10/290) 5 (5)
 BTA56010D 5", 6" 0/200 (-20/100) 2 (2)
 BTA5605D 5", 6" 0/250 (-20/120) 2 (2)
 BTA5607D 5", 6" 50/550 (10/290) 5 (5)
 
Popular Lower Connection Models:
Model Number Dial Size Stem Length Temp Range, °F(°C) Degree Div., °F(°C)
 BTC3255D 3" 2.5" 0/250 (-20/120) 2 (2)
 
 
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