Vaisala PTU200 Technical data

P.O. Box 26, FIN-00421 Helsinki, FINLAND

Email: [e-mail]

PTU200 Combined Pressure, Humidity and
Temperature Transmitter

Features/Benefits

• Barometric pressure, humidity and

temperature measurement in one
transmitter

• Available with two barometric

pressure sensors for added
reliability

• RS232C serial interface with NMEA

protocol for GPS use

• Optional local display and RS485

serial interface

• NIST traceable (certificate included)

• Optional IP65 (NEMA 4) outdoor

installation kit and tripod available

Tel: [phone]

Fax: [phone]

www.vaisala.com

Three-in-one measurement

The Vaisala Combined Pressure,
Humidity and Temperature
Transmitter PTU200 is a versatile
multipurpose instrument for various
applications. The transmitter can be
used e.g. in GPS* meteorology and
other meteorological applications, as
well as in environmental monitoring in
calibration laboratories.

The user can select between two
pressure accuracy classes. The PTU200
can also be equipped with a second
pressure sensor for added reliability.
Three different probes can be used
with the PTU200 transmitter. Two of
the probes are relative humidity and
temperature probes and one is a
temperature probe.

Serial communication

An RS232C serial interface is standard
with PTU200 transmitters. The
transmitter software is also compatible

PTU200 combines
barometric pressure,
humidity and temperature
measurement in one
transmitter.

with major GPS receivers and NMEA
(National Marine Electronics
Association) coded messages. An
optional RS485 interface is available.

Vaisala's proven sensor
technology

The PTU200 transmitter uses the
Vaisala BAROCAP® Sensor for pressure
measurement. The humidity and
temperature probes are fitted with the
Vaisala HUMICAP® Sensor. The sensors
are known for their high accuracy and
excellent long-term stability. The
temperature sensor is a platinum RTD
sensor.

Outdoor installation kit

For outdoor use, an optimized Vaisala
Meteorological Installation Kit
PTU200MIK1 is available. The
PTU200MIK1 includes a IP65 (NEMA

4) rated enclosure for the barometer, a
static pressure head and a radiation
shield for the humidity and

Applications

• GPS meteorology: estimating

precipitable water vapor in the
atmosphere

• GPS accuracy improvement

• Meteorological applications

• Environmental monitoring in

calibration laboratories

temperature probe. In addition, an
optional Vaisala Tripod
PTU200TRIPOD is available to enable
quick field setup.

* GPS = Global Positioning System

Vaisala Meteorological Installation Kit
PTU200MIK1 equipped with Vaisala Tripod
PTU200TRIPOD.

106 Vaisala Instruments Catalog 2005

Ref. B210435en rev. A

PTU200

BAROMETRIC PRESSURE

Technical Data

Barometric pressure

Pressure range 500...1100 hPa, 50...1100 hPa

Accuracy 500…1100 hPa 50....1300 hPa

Linearity ±0.05 hPa ±0.10 hPa ±0.20 hPa
Hysteresis* ±0.03 hPa ±0.03 hPa ±0.08 hPa
Repeatability* ±0.03 hPa ±0.03 hPa ±0.08 hPa
Calibration uncertainty** ± 0.07 hPa ±0.15 hPa ±0.20 hPa
Accuracy at +20 °C*** ± 0.10 hPa ±0.20 hPa ±0.30 hPa

Temperature dependence**** ±0.1 hPa ±0.1 hPa ±0.3 hPa
Total accuracy (-40...+60 °C / -40...+140 °F)

±0.15 hPa ±0.25 hPa ±0.45 hPa
Long-term stability/year ±0.1 hPa ±0.1 hPa ±0.2 hPa
Response time (100% response)

one sensor 2 s
* Defined as ±2 standard deviation limits of endpoint nonlinearity,
hysteresis error, or repeatability error.
** Defined as ±2 standard deviation limits of inaccuracy of the

working standard including traceability to NIST.
***Defined as the root sum of the squares (RSS) of endpoint

nonlinearity, hysteresis error, repeatability error and calibration
uncertainty at room temperature.
****Defined at ±2 standard deviation limits of temperature

dependence over the operating temperature range.

Relative humidity

Measurement range 0.8...100 %RH
Output scale 0...100 %RH equals 0...1 VDC
Accuracy at +20 °C (including nonlinearity and hysteresis)

against factory references ±1 %RH

field calibration against references ±2 %RH (0...90% RH)

Typical long-term stability better than 1 %RH per year
Temperature dependence ±0.05 %RH/°C
Response time (90%) at +20 °C 15 sec. with membrane filter
Sensor HUMICAP® 180

Temperature

HMP45A-P & HMP45D ProbesHMP45A-P & HMP45D Probes

HMP45A-P & HMP45D Probes

HMP45A-P & HMP45D ProbesHMP45A-P & HMP45D Probes
Measurement range -36...+60 °C (-33…+140 °F) (HMP45A-P)

Accuracy

at -40 °C (-40 °F) ±0.5 °C (±0.9 °F)

at +20 °C (68 °F) ±0.2 °C (±0.4 °F)

at +60 °C (140 °F) ±0.4 °C (±0.7 °F)
Temperature sensor

HMP 45 A-P Pt 1000 IEC 751 1/3 Class B

HMP 45D Pt 100 IEC 751 1/3 Class B
PT100 Sensor HeadPT100 Sensor Head

PT100 Sensor Head

PT100 Sensor HeadPT100 Sensor Head
Measurement range -40...+60 °C (-40…+140 °F)
Accuracy ±0.2°C (±0.4 °F)
Temperature sensor Pt 100 IEC 751 1/4 Class B

Class A Class B

• 1 s• 1 s•

±3 %RH (90...100% RH)

-40...+60 °C (-40…+140 °F) (HMP45D)

with local display less than 30 mA (without backlight)

less than 50 mA (with backlight)

hardware shutdown mode less than 0.1 mA

Serial I/O full duplex RS 232C

• or

bidirectional TTL level or

half duplex RS 485/422 two-wire
code ASCII
parity even•, odd, none
data bits 7
stop bits 1

• or 8

• or 2

Baud rates 300, 600, 1200, 2400, 4800, 9600
Pressure units hPa•, mbar, kPa, Pa, inHg,

mmH20, mmHg, torr, psia
Humidity units %RH
Temperature units °F, °C
Resolution 0.1 hPa•, 0.1 %RH, 0.01°C
Settling time at power-up (one sensor)

class A 6 s
class B 5 s•

Acceleration sensitivity negligible
Weight

depending on selected probe 2.3/1.3/1.1 kg

Transmitter bodyTransmitter body

Transmitter body

Transmitter bodyTransmitter body
Pressure connector M5 (10-32) internal thread
Pressure fitting barbed fitting for 1/8" I.D. tubing

quick connector with shutoff valve for 1/8" hose
Maximum pressure limit 5000 hPa abs.
Electrical connector female 9-pin subD
Housing epoxy painted aluminum
HMP45A-P and HMP45DHMP45A-P and HMP45D

HMP45A-P and HMP45D

HMP45A-P and HMP45DHMP45A-P and HMP45D
Housing ABS plastic
Probe cable length 20 m (HMP45A-P)

3.5 m (HMP45D)
Housing classification IP65 (NEMA 4)
Sensor protection (standard) membrane filter part no. 2787HM
Pt100 ProbePt100 Probe

Pt100 Probe

Pt100 ProbePt100 Probe
Probe cable length 2 m
Complies with EMC standard EN61326-1:1997+ Am1:1998 +
Am2:2001; Generic Environment.

Accessories

PTU200MIK1 outdoor mounting kit
PTU200TRIPOD tripod stand
213119 DC adapter for PTB220/PTU200 series
213026 DC adapter for PTB220/PTU200 series & RS232 cable for PC
AC adapter, universal 100-240 VAC with US, EURO, UK or AUS plugs,
to be used together with 213119 or 213026
Factory settings are marked with a

•.

•

•

General

Temperature range

operating -40...+60 °C (-40…+140 °F)
with local display 0...+60 °C (+32…+140 °F)
storage -40...+60 °C (-40…+140 °F)

with local display -20...+60 °C (-4…+140 °F)
Humidity range non-condensing
Supply voltage 10...30 VDC polarity protected
Supply voltage sensitivity negligible
Current consumption less than 30 mA

Ref. B210435en rev. A

240 (9.45)

24

A

A

(0.94)

118 (4.65)

Removable probe
head

¯18.5

(¯0.72)

BAROCAP® and HUMICAP® are registered trademarks of
Vaisala. Specifications subject to change without prior notice.
©Vaisala Oyj

A-A

20.5

(0.81)

(0.94)

24

107Vaisala Instruments Catalog 2005