Fluke 52 Digital Thermometer

The Fluke 52 Digital Thermometer is a dual-input instrument for precise temperature measurement across laboratory, quality assurance, process calibration, food safety, and HVAC/R applications. It simultaneously measures and displays temperatures from two independent sources with laboratory-grade accuracy and fast response times in a compact, rugged package.

Technical Specifications

Thermocouple Types: J, K, T, and E-type supported. Temperature Ranges:

• J-type: −210°C to 1200°C (−346°F to 2192°F)


• K-type: −200°C to 1372°C (−328°F to 2501°F)


• T-type: −250°C to 400°C (−418°F to 752°F)


• E-type: −150°C to 1000°C (−238°F to 1832°F)


• General measurement ceiling: 900°C (1600°F) Accuracy:


• Above −100°C (−148°F): ±[0.05% + 0.3°C (0.5°F)] for J, K, T, E-types


• Below −100°C (−148°F): ±[0.20% + 0.3°C (0.5°F)] for J, K, E-types; ±[0.50% + 0.3°C (0.5°F)] for T-type Display: Dual-input backlit display with 0.1°C and 0.1 K resolution below 1000; 1°C and 1 K resolution at 1000 and above. Shows any combination of T1, T2, T1–T2, MIN, MAX, or AVG. Units: °C, °F, K. Power: 3 × AA batteries, 1000 hours typical runtime. Auto sleep mode after 20 minutes inactivity. Dimensions: 173 × 86 × 38 mm (6.8 × 3.4 × 1.5 inches). Weight: 0.4 kg (0.9 lbs). Operating Temperature: −10°C to 50°C (14°F to 122°F).

Key Features

• Single and differential temperature measurement (T1, T2, T1−T2)


• MIN, MAX, and AVG recording with relative time clock for event reference


• Electronic offset function for thermocouple error compensation


• HOLD function for frozen readings


• Impact-absorbing holster with splash and dust resistance

Typical Applications Temperature monitoring in calibration labs, food safety verification, HVAC system diagnostics, and process control environments requiring dual-point measurement and data trending.

Compatibility & Integration Accepts standard J, K, T, and E-type thermocouple probes across the full specified temperature range.