Field Instruments

Product Overview

The Fluke 51 II Handheld Digital Probe Thermometer is a high-accuracy, single-input contact thermometer designed for reliable temperature measurement in industrial, laboratory, HVAC, food safety, and quality assurance applications. Delivering fast response and laboratory-grade accuracy, the Fluke 51 II is ideal for professionals who require precise contact temperature measurements in demanding environments.

Designed for ease of use and durability, the 51 II features a large backlit display, intuitive front-panel controls, and long battery life. Its rugged construction and wide thermocouple compatibility make it a dependable tool for maintenance technicians, engineers, and calibration professionals.

Key Features

• Single Thermocouple Input: Measures one temperature source accurately
• High Accuracy: Laboratory-grade accuracy of ±(0.05 % + 0.3 °C)
• Wide Thermocouple Support: Compatible with J, K, T, and E-type thermocouples
• Large Backlit Display: Clear temperature readings in °C, °F, or Kelvin (K)
• MIN / MAX / AVG with Time Reference: Relative time clock records key events
• Electronic Offset Function: Compensates for thermocouple errors for improved accuracy
• Fast Response Time: Ideal for dynamic temperature measurements
• Sleep Mode: Extends battery life during idle periods
• Rugged Design: Splash- and dust-resistant housing with impact-absorbing holster
• Long Battery Life: Typical 1000 hours of operation

Technical Specifications

Manufacturer: Fluke
Model: 51 II
Type: Single-Input Digital Probe Thermometer

Temperature Measurement

Thermocouple Types: J, K, T, E

Temperature Ranges:
• J-type: –210 °C to +1200 °C
• K-type: –200 °C to +1372 °C
• T-type: –250 °C to +400 °C
• E-type: –150 °C to +1000 °C

Accuracy (Above –100 °C):
• J, K, T, E: ±(0.05 % + 0.3 °C)

Accuracy (Below –100 °C):
• J, K, E: ±(0.20 % + 0.3 °C)
• T-type: ±(0.50 % + 0.3 °C)

Display Resolution:
• 0.1 °C / 0.1 K (< 1000)
• 1 °C / 1 K (≥ 1000)

Display

• Large single-line backlit LCD
• Displays temperature, thermocouple type, and statistical values

Data & Functions

• MIN / MAX / Average temperature tracking
• Relative time clock for recorded events
• Electronic offset calibration
• Hold function for stable readings

Power Supply

• 3 × AA batteries
• Typical battery life: up to 1000 hours
• Easy battery replacement without breaking calibration seal

Environmental & Mechanical

• Operating temperature: –10 °C to +50 °C
• Storage temperature: –40 °C to +60 °C
• Splash and dust resistant enclosure
• Impact-absorbing protective holster
• Dimensions: 173 × 86 × 38 mm
• Weight: Approx. 400 g

Applications

• Industrial and electrical maintenance
• HVAC system testing
• Food safety temperature monitoring
• Process calibration
• Laboratory and QA measurements
• Preventive and predictive maintenance

Why Buy from FieldInstruments.lk?

• 100 % genuine Fluke instruments with manufacturer warranty
• Competitive pricing and fast island-wide delivery
• Expert local technical support and application guidance
• Reliable after-sales service and calibration assistance

The Fluke 51 II Handheld Digital Probe Thermometer delivers precision, durability, and long-term reliability, making it an excellent choice for professionals who require accurate contact temperature measurement in both field and laboratory environments.

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk