Characteristics:

HS0818 contains two models of HS0818A and HS0818B.  It has the features of Auto-temperature Measuring, Quick Response, Wide Operating Temperature range, Real-time / Average / Maximum / Minimum / Difference value Measuring & Display, Adjustable Emissivity, High / Low temperature Alarm value setting / Over limit Alarm 

switch, Measurement Scanning / Data hold, Up to100 measured Data Memory Units for reading, LCD Backlight, Target Laser aiming, Optional Fahrenheit ℉/ Celsius ℃ temperature Display, Battery Low Alert, Auto-power off after Standby 7 seconds, USB interface/PC Display software via USB, Available with K-type Thermocouple for temperature measuring, Available with 9VDC Power Adapter and so on. 

Specifications:

Measuring range             HS0818A:  -32～1200℃ (-25.6～2192℉);

HS0818B:  -32～1650℃ (-25.6～3002℉).

Resolution                             Typical 0.1℃ or 0.1℉

Measuring accuracy         −32~15°C: ±3.0°C;  15~50°C: ±(1.5％＋2℃);

50~510°C: ±(1.5％＋1℃);  510～1200℃/1650℃: ±1.5％.

Repeatability accuracy       The greater of ±0.5℃ and ±0.5% of reading

Wavelength band                          8～14μm

Distance:Spot Ratio                       30:1, 50:1.

Operating Temperature                     0～50°C

Storage Temperature                     −20～60°C

Relative Humidity                10~90% without coagulated dew

Response Time                          100～500ms

Emissivity                     Default: ε=0.95 (0.10~1.00 adjustable)

Display                   Dual 5 digits LCD display with backlit

H/L Temperature Alarm      Default: HAL=1000℃(High), LAL=00℃(Low).

K-type thermocouple  HS0818A: null;

HS0818B: Range -40～1370℃, accuracy ±(1.5 ％＋1℃).

USB interface         HS0818A: null;

HS0818B: USB socket, PC Display software via USB.

Laser aiming      Current drain≤8mA, Power＜1mW, Wavelength 630～670nm.

Backlighting                          Current drain ≤8mA

Power Supply            Max current Im≤20mA, Standby current Is≤5uA.

HS0818A: 9V 6F22 battery×1;

HS0818B: 9V 6F22 battery×1,,or 9VDC adapter×1.

Match colors             5 optional shell colors: Dark Gray-Dark Green,

Black-Pale Yellow, Red-Black, Blue-Dark Gray, Milk White-Silver Gray.

Dimensions                    Max. size 137mm×205mm×55mm

Weight                               285g (without battery)