日本奧普士PT-305L手持式測溫儀是一款小巧便攜、操作簡便的非接觸式測溫工具。它采用口袋型設計，便于攜帶，適用于多種場景，如汽車引擎安檢、電機線路檢測、鐵道運輸軸承檢查以及低溫冷藏品檢測等。

該測溫儀的測定溫度范圍為-40℃至510℃，能夠滿足多種環(huán)境下的溫度測量需求。其測定區(qū)域范圍為D:S=10:1，檢出波長為8～14um。在測量精度方面，PT-305L的表現(xiàn)較為出色，測定精度為讀取值的±1％或2℃（ε＝0.95），再現(xiàn)性為讀取值的±1℃。此外，該設備還具備℃/℉切換功能，用戶可以根據(jù)需要選擇不同的溫度單位。

PT-305L的顯示部分帶有背光功能，即使在光線較暗的環(huán)境中也能清晰讀取測量數(shù)據(jù)。它使用單3干電池×2只供電，電池壽命約30小時。在物理特性方面，該設備的尺寸為140mm×56mm×37mm，重量僅為180g，輕巧的設計使其長時間使用也不會感到疲勞。

The Japanese OPTEX PT-305L handheld thermometer is a compact and easy-to-use non-contact temperature measuring tool. With its pocket-sized design, it is convenient to carry and suitable for various applications, such as automotive engine inspection, electrical circuit detection, railway bearing inspection, and low-temperature refrigerated product inspection.

The thermometer has a wide measuring range of -40℃ to 510℃, which can meet the temperature measurement needs in various environments. It has a measuring area range of D:S=10:1 and a detection wavelength of 8～14um. In terms of measurement accuracy, the PT-305L performs well, with a measurement accuracy of ±1％ of the reading or 2℃ (ε＝0.95), and a reproducibility of ±1℃. Additionally, the device features a switchable display between ℃ and ℉, allowing users to choose their preferred temperature unit.

The PT-305L also has a backlight display, which ensures clear reading of measurement data even in low-light conditions. It is powered by two AA batteries and has a battery life of approximately 30 hours. In terms of physical characteristics, the device measures 140mm×56mm×37mm and weighs only 180g, making it lightweight and comfortable to use for extended periods.