--- product_id: 20508558 title: "51 II Single Input Digital Thermometer" brand: "fluke" price: "¥117439" currency: JPY in_stock: true reviews_count: 8 url: https://www.desertcart.jp/products/20508558-51-ii-single-input-digital-thermometer store_origin: JP region: Japan --- # Compatible with 4 thermocouple types Min/Max/Average time tracking Wide temp range -40°C to 260°C 51 II Single Input Digital Thermometer **Brand:** fluke **Price:** ¥117439 **Availability:** ✅ In Stock ## Summary > 🌡️ Stay ahead of the heat with precision you can trust! ## Quick Answers - **What is this?** 51 II Single Input Digital Thermometer by fluke - **How much does it cost?** ¥117439 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/20508558-51-ii-single-input-digital-thermometer) ## Best For - fluke enthusiasts ## Why This Product - Trusted fluke brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Certified Accuracy:** NIST-compliant for trusted, regulation-ready temperature readings every time. - • **Multi-Scale Mastery:** Seamlessly switch between Celsius, Fahrenheit, and Kelvin to suit your professional standards. - • **Data-Driven Insights:** Track minimum, maximum, and average temperatures over time to optimize your processes with confidence. - • **Precision Across Extremes:** Accurately measures from freezing cold to furnace heat (-40°C to 260°C) for versatile industrial use. - • **Universal Probe Compatibility:** Supports Type K, J, T, and E thermocouples, ensuring you’re ready for any measurement challenge. ## Overview The Fluke 51 II Single Input Digital Thermometer is a professional-grade thermocouple thermometer designed for demanding industrial environments. It measures temperatures from -40°C to 260°C (-40°F to 500°F) using Type K, J, T, or E probes, and offers readings in Celsius, Fahrenheit, or Kelvin. Featuring min/max/average tracking and NIST compliance, it delivers reliable, versatile, and regulation-ready temperature monitoring for furnaces, kilns, freezers, and more. ## Description The Fluke Digital thermocouple thermometer is used for applications requiring a broad range of temperatures, including furnaces, kilns, freezers, and other industrial applications. This thermometer measures temperatures in Celsius, Fahrenheit, or Kelvin via a Type K, Type J, Type t, or Type E thermocouple probe. It comes with one or two Type K bead thermocouple probes with 40 inch. ## Features - Thermocouple thermometer for use in applications requiring a broad range of temperatures, including furnaces, kilns, freezers, and other industrial applications - Measures temperatures in Celsius, Fahrenheit, or kelvin via a type k, type j, type t, or type e thermocouple probe - Includes a type k bead thermocouple probe with a 40" cable that measures from minus 40 to +260 degrees C ( minus 40 to +500 degrees F) - Provides the relative time of minimum, maximum, and average temperature measurements for monitoring - Conforms to NIST standards for compliance with regulations ## Product Details - **Brand:** Fluke - **Special Feature:** High Accuracy - **Color:** Black, Yellow - **Age Range (Description):** Adult - **Included Components:** Fluke 51 II contact thermometer - **Outer Material:** Plastic - **Specification Met:** NIST - **Display Type:** Digital - **Connectivity Technology:** Wired (Thermocouple) - **Product Care Instructions:** Wipe Clean ## Images ![51 II Single Input Digital Thermometer - Image 1](https://m.media-amazon.com/images/I/616BmG0DkJL.jpg) ## Questions & Answers **Q: Are these manufactured in the usa? usually if so, the ad will make a big deal of the fact. this one didn't...** A: The Fluke 51-2 is not assembled in the USA. **Q: Can i leave the probe inside my gas fired forge and read the temp for determining heat treat temps on various steels? pretty much twice a week or more** A: You may want to get a stainless steel probe if you want to leave it in for 2 weeks. What is the Temperature Range and I can Ask Fluke what they recommend. **Q: Does this unit come with the actual nist certificate?** A: It did when I bought it, but that was 5 years ago. **Q: how many temperature probes does the Fluke 51-2 come with? It says 1 or 2 -- I am not sure how many come with a regular/standard shipment.** A: The 51-2 comes with a single probe, the 52-2 comes with 2. One is a single input and one is double. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Accurate *by B***E on July 17, 2025* With all fluke products they are a little on the spendy side but they are reliable and hold up great! ### ⭐⭐⭐⭐⭐ If you care about temperatures *by C***C on February 13, 2025* Fluke has really thought out their line of digital thermometer instruments. Although this is the basic model of the line, it has all the accuracy, durability for daily field use, and flexibility to accept the various Fluke probes.The clear choice for HVAC professionals, code inspectors, laboratory work, serious hobbyists, etc. ### ⭐⭐⭐⭐ Bought this for cooking. Unbeatable durability, few features, high price *by E***C on June 2, 2023* I’m an engineer. I’ve used these thermocouple readers and other Fluke equipment in my profession for years. I bought this one for home cooking because I got tired of seeing cheap digital kitchen thermometers fail in the middle of a recipe. Here’s the good, the bad and the ugly from a cooking standpoint:The good:1) Absolutely unrivaled durability. You could certainly break this if you tried but you’re very unlikely to ever break it by accident. I have used Fluke products at work for 15+ years and they are just all-the-way tough.2) Standard thermocouple jack. You can plug in and use just about any kind of thermocouple of any shape from any manufacturer. It’s possible to even make a DIY thermocouple if you feel like it. If you thermocouple dies, you only have to replace it, not the reader.3) Runs on 3 ordinary AA batteries. The batteries will last a very, very long time and are cheap and easy to replace when they finally die.The bad:1) Very, very expensive for use as a kitchen thermometer. But see above. I’ve broken so many cheap ones that I could have just bought this at the start and never had a failure.2) Very few features, and the features it does have are not tailored to cooking. In particular, this model does not have a temperature alarm. You just have to keep an eye on it. You could probably buy a Fluke reader with a temperature alarm but it would cost even more.3) Ships with a basic, bare type K thermocouple that is not appropriate for cooking use. You’ll have to spend about $20 more to buy a stainless steel probe shaped thermocouple suitable for cooking.The ugly:1) It’s industrial-grade equipment. It looks like it belongs in a factory or a laboratory because that’s what it’s designed for. With the right thermocouple it’s perfectly safe to use in the kitchen but it looks out of place. Personally, I like that. If you have a spouse or significant other who might be concerned then you might want to ask him/her/them about it before you spend the money.Overall, minus one star for the high price and lack of features. I’m sure Fluke makes a handsome profit off of every one of these they sell. I can't fault Fluke for the "bad" points because they didn't intend this to be a kitchen thermometer. If you just want a very basic but very reliable thermocouple reader for industry or for the kitchen, this one will do the job. ## Frequently Bought Together - Fluke 51 II Single Input Digital Thermometer - Fluke 80PK-22 SureGrip Immersion Temperature Probe - Fluke C35 Polyester Soft Carrying Case --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/20508558-51-ii-single-input-digital-thermometer](https://www.desertcart.jp/products/20508558-51-ii-single-input-digital-thermometer) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-04-22*