MD-HMW-71 Specifications
General
Operating Temperature Range:	- 4 to +140° F (-20° to +60° C)
Storage Temperature Range:	- 40 to +176° F (-40° to +80° C)
Relative Humidity
Measurement Range:	0 to 100% RH
Accuracy at +68° F (+20° C):	± 2% RH (0 to 90% RH) ± 3% RH (90 to 100% RH)
Temperature Dependence:
Response Time:	(90%) at 68° F (20° C) in still air 15 seconnds (with membrane filter)
Humidity Sensor:	HUMICAP® 180
Temperature
Measurement Range:	-4 to +140° F  (-20 to +60° C)
Accuracy:
Linearity:	Better than 0.18° F  (0.1° C)
Temperature Sensor:	Pt 1000 IEC 751 class B

• Specifications subject to change without notice. HUMICAP^® is a registered trademark of Vaisala.

LONG-TERM STABILITY

The MD-PTB-100 analog barometer is designed both for accurate barometric measurements at room temperature and for general environmental pressure monitoring over a wide temperature range. The excellent long-term stability of the barometer minimizes or even removes the need for field adjustment in most applications.

The MD-PTB-100 barometer uses the BAROCAP^® silicon capacitive absolute pressure sensor for barometric pressure measurement applications. The BAROCAP^® sensor combines the outstanding elasticity characteristics and mechanical stability of single-crystal silicon with the proven capacitive detection principle.

In addition, all PTB100 barometers are delivered with a factory calibration certificate which is NIST traceable.

• Specifications subject to change without notice. BAROCAP^® is a registered trademark of Vaisala.

• Full 0 to 100% RH Measurement
• Temperature Compensation
• ± 2% Accuracy
• NEMA 4 Housing
• Electronic, on-site, one-point calibration
• Electromagnetically compatible