9171-DW-R-156.

Field metrology well calibrator without insert and with built-In reference. It allows to bring lab-quality performance into whatever field environment you're working in. If you need more depth, the model provides 203mm (8in) of immersion over temperatures from -30°C all the way to 155°C with full-range stability of ±0.005°C. Just like the 9170, this dry-well has exceptional axial and radial uniformity.

• Exceptional accuracy to ±0.1°C over its full range
• Accurate enough for lab use and rugged and portable enough to take anywhere
• Best-performing industrial heat sources (accuracy, stability, uniformity) in the world
• Optional ITS-90 reference input reads PRTs to ±0.006°C
• Temperature range (at 23°C ambient) -30°C to 155°C (-22°F to 311°F)
• LCD, °C or °F (user-selectable) display
• Data at -30°C, 0°C, 50°C, 100°C, 155°C traceable calibration (NIST)
• RS-232 computer interface
• Ten keys with decimal and +/- button, Functional key and °C/°F key