Fluke 1551A-12 Stik Thermometer & Temperature Calibrator

The Fluke 1551A-12 Stik Thermometer is a portable reference thermometer designed for temperature measurement from -50°C to 160°C (-58°F to 320°F). This intrinsically-safe device delivers repeatable measurements accurate to ±0.05°C and is rated for environments where potentially explosive gases may be present, as well as standard industrial settings.

Key capabilities include user-configurable temperature displays, trend/stability indicators, and a rotatable 90-degree backlit LCD display for easy reading from any angle. The stainless steel probe and digital readout are factory-calibrated as a unified system.

Features include 300-hour battery life with auto-off functionality, low-battery indicators, percent battery-life display, and three-point calibration capability. The device includes NVLAP-accredited NIST-traceable calibration and is suitable for daily thermometer checks, custody transfer verification, PET and LIG calibration, and temperature transmitter testing.

Optional data logging stores up to 10,000 time-stamped readings with selectable 2–60 second intervals. Damping adjustable from 2–10 readings. Temperature resolution selectable at 0.1, 0.01, or 0.001 degrees.

Key Specifications: Temperature Range: -50°C to 160°C (-58°F to 320°F) Accuracy (1 year): ±0.05°C (±0.09°F) Temperature Resolution: Selectable: 0.1, 0.01, 0.001 (default 0.01) Sample Rate: Selectable: 0.5, 1, 2 seconds (default 1 second) Sensor Type: 100Ω thin-film RTD Probe Size: 6.35 mm x 305 mm (1/4 in x 12 in) Probe Sheath Material: Stainless steel Response Time (6.35 mm probe): 21 seconds Minimum Immersion Depth: 70 mm (wet medium), 120 mm (dry medium) Readout Dimensions: 125 mm x 62 mm x 35 mm (5 in x 2.5 in x 1.4 in) Weight: 196 g (6.9 oz) Operating Temperature Range: -10°C to 50°C (14°F to 122°F) Storage Temperature: -20°C to 60°C (-4°F to 140°F), 0–95% RH non-condensing Battery Life: Approximately 300 hours continuous (12.5 days) backlight off Power Source: 3-AAA alkaline batteries Display Units: °C, °F Communications: RS-232 stereo jack (calibration parameters only) Safety Standard: IEC 60079-0, IEC 60079-11: Ex ib IIB T4 Gb; IEC 61010-1 Calibration: NVLAP-accredited, NIST-traceable