For NR-81531A
* Characteristic:Straight handle type／surface pop head 
* Suitable for measuring the temperature of small flat surface and curved surface
* Measuring range:-50~400°C
* Hot response time quickly:within five seconds
* Accuracy:±1.5°C
* Length of Spring wire:extend to 1.5~2m
* Handle: length 125mm,Dia.16mm
* Stainless probe: length 200mm; Dia.6mm; Dia. of head:15mm

For NR-81531B
* Characteristic:handle type/surface pop head 
* Suitable for measuring the temperature of small flat surface and curved surface
* Measuring range:-50~400°C
* Hot response time quickly:within five seconds
* Accuracy:±1.5°C
* Length of Spring wire:extend to 1.5~2m
* Handle & probe integration: length 130mm,Dia.13mm; Dia. of head:15mm

For NR-81531A
* Characteristic:Straight handle type／surface pop head 
* Suitable for measuring the temperature of small flat surface and curved surface
* Measuring range:-50~400°C
* Hot response time quickly:within five seconds
* Accuracy:±1.5°C
* Length of Spring wire:extend to 1.5~2m
* Handle: length 125mm,Dia.16mm
* Stainless probe: length 200mm; Dia.6mm; Dia. of head:15mm

For NR-81531B
* Characteristic:handle type/surface pop head 
* Suitable for measuring the temperature of small flat surface and curved surface
* Measuring range:-50~400°C
* Hot response time quickly:within five seconds
* Accuracy:±1.5°C
* Length of Spring wire:extend to 1.5~2m
* Handle & probe integration: length 130mm,Dia.13mm; Dia. of head:15mm