Specifications

89
FEATURES
 500...1100 hPa pressure range
 -40...+140 °F (-40...+60 °C) temperature range
 Total accuracy
class A ±0.15 hPa
class B ±0.25 hPa
 0.01% reading accuracy
(class A/800...1100 hPa/+20 °C)
 Long term stability ±0.1 hPa/year
 Available with one, two or three barometric
pressure transducers
 Available with:
RS 232C/TTL level,
RS 485/RS 422 serial interface, or
RS 232C/05VDC (020mA) output
 Available with local display with backlight
 Fast measurement mode
APPLICATIONS
 Barometric transfer standard
 Electronic alternative for Hg barometer
 Weather stations
 Data buoys and ships
 Laser interferometers
ACCURACY AND STABILITY
The PTB 220 series digital barometers are designed
for a wide environmental pressure and temperature
range. The class A barometers are fine adjusted and
calibrated against a deadweight tester. The class B
barometers are adjusted and calibrated using elec-
tronic working standards.
A single barometer can have one, two or three
pressure transducers. Two or three transducers
provide redundancy which improves measurement
reliability in airport, weather station and pressure
standard applications.
The local display has two rows and it can simulta-
neously show the barometric pressure, three-hour
pressure trend and WMO pressure tendency code.
The PTB 220 series digital barometers use the
BAROCAP
®
silicon capacitive absolute pressure
sensor developed by Vaisala for barometric pressure
measurement applications. The BAROCAP sensor
has excellent hysteresis and repeatability characteris-
tics and outstanding temperature and long-term
stability.
The PTB 220TS (transfer standard) is comprised
of the PTB 220 transmitter and rechargeable
battery. Conveniently housed in an attractive
and rugged oak carrying case, it provides
added protection and ease of portability. The
high accuracy of the PTB 220 makes the PTB
220TS ideal as a transfer standard for calibrating
barometers in the field.
PTB 220
PTB 220 Series Digital Barometers
PTB 220TS