Vaisala HMT360N Technical data

P.O. Box 26, FI-00421 Helsinki, Finland

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www.vaisala.com/HMT360N

HMT360 Series Dewpoint and Temperature
Transmitters for Natural Gas Moisture

Features/Benefits

• Vaisala HUMICAP® Sensor features

high accuracy, excellent long-term
stability, and negligible hysteresis

• Excellent performance in harsh

conditions; tolerates glycol and
water spikes

• Measures dewpoint of water, also

outputs lb/MMscf, ppmv and T

• Safe operation with the entire

transmitter in hazardous areas:
Division 1 and 2 (USA, Canada),
Category 1 / Zone 0 (EU)

• One-year maintenance interval

saves lifetime costs

• Interchangeable probes

• Direct pipeline installation possible

• Sampling cell option

• NIST traceable (certicate included)

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e HMT362, HMT364 and HMT368 are innovative and reliable instruments for measuring
moisture in natural gas.

e Vaisala HUMICAP® Dewpoint
and Temperature Transmitter Series
HMT360 is a reliable instrument for
measuring moisture in natural gas.
An accurate moisture measurement
is critical for preventing pipeline
failures and ensuring the quality of
the gas.

Reliable technology now
for natural gas

e Vaisala HUMICAP® polymer
sensor technology has been
successfully used for decades in
industrial moisture measurements.
e technology is now optimized for
measuring moisture in natural gas.

Low maintenance need

e HMT360 is long-lasting and
typically needs calibration only once
a year, saving lifetime costs and
measurement downtime.

When recalibration is needed, the
transmitter or just the probe can

20

be sent to Vaisala. All calibration
coecients are included in the
interchangeable probe unit itself,
which means that a calibrated probe
can be switched in the eld in a couple
of minutes.

Intrinsically safe

e whole HMT360 transmitter can be
installed into areas classied as having
a constant risk of explosion.

Rugged and reliable

e durable design and trouble-free
operation of the HMT360 ensure a
long-term solution for monitoring
moisture in natural gas.

Three models with
interchangeable probes

e three probe options allow dierent
measurement setups, for example
using a sampling cell, or temporary or
permanent installation directly into the
pipeline.

Customized calibration and
maintenance contracts for the
HMT360 series transmitters for natural
gas are available on request.

Dimensions

Dimensions in mm (inches)

HMT360 transmitter body

Vaisala Instruments Catalog 2009

Ref. B210768EN rev. A

HMT360 SERIES FOR NATURAL GAS DEWPOINT

Dewpoint temperature (°C)

0

20 40 60

0

40

-50

Process temperature (°C)

10

20

30

50

60

-10

-20

-40

-30

-60

3010

50

-10

-20

Not recommended for long-term use

Accuracy not specified

Accuracy ± 2 °C Td

Technical Data

Performance

Water dewpoint measurement

Measurement range -50 ... +50 °C (-58 ... +122 °F) T
Accuracy ±2 °C (±3.6 °F) (see graph below)

Dewpoint accuracy vs. measurement conditions

Response time 63 % [90 %]

-20 -> +10 °C (-4 -> +50 °F) 6 s [32 s]
+10 -> -20 °C (+50 -> -4 °F) 120 s [370 s]

Sensor Vaisala HUMICAP® 180M

Temperature

Measurement range -40 ... +100 °C (-40 ... +212 °F)
Typical accuracy at +20 °C (+68 °F) ±0.2 °C (±0.36 °F)
Sensor Pt 1000 RTD 1/3 Class B IEC 751

Calculated variables (typical ranges)

water content 0 ... 20 lb/MMscf, 0 ... 320 mg/Nm
parts per million by volume 0 ... 500 ppm

Operating environment

Temperature range

operating -20 ... +60 °C (-4 ... 140 °F)
storage -40 ... +70 °C (-40 ... 158 °F)
Pressure range see probe specications

Complies with EMC standard EN61326-1, Electrical equipment for
measurement, control and laboratory use ­EMC requirements; Industrial environment.
NOTE! IEC 1000-4-5 complies only when using external EXi
approved surge arrester on safe area.

Inputs and outputs

Operating voltage 12 ... 28 VDC

with serial port (service mode) 15 ... 28 VDC
Analog outputs two-wire 4 ... 20 mA, one standard, one optional
Typical accuracy of analog outputs at +20 °C ±0.05% full scale
Typical temperature dependence

of analog outputs 0.005% / °C (0.005% / °F) full scale
Analog outputs connection via safety barriers
RS232C serial output for service use connector type RJ45
Display two-line LCD
character size (1st line/2nd line) 12 mm/10 mm

USA (FM) Classes I, II, III, Division 1, Groups A-G and

Division 2, Groups A-D, F and G

d

Safety factors: V

= 1 nF, Li = 0, Pi = 0.7 W, T

C

i

FM Project ID: 3010615

= 28 VDC, I

max

= 60 °C(140 °F), T5

amb

Japan (TIIS) Ex ia IIC T4

Code number: TC17897

Safety factors: U

= 28 VDC, Ii = 100 mA, Ci = 1 nF,

i

= 0.7 W, Li = 0, T

P

i

amb

China (PCEC) Ex ia II CT5

Certicate No. CE042052

Standard GB3686.1-2000 and GB3836.4-2000

Canada (CSA) Class I, Division 1 and Division 2, Groups A, B, C, D;

Class II, Division 1 and Division 2, Groups G and Coal Dust;

CSA File No: 213862 0 000, CSA Report: 1300863

Safety factors: T

connected as per Installation Drawing DRW213478.

= 60 °C, T4, Intrinsically safe when

amb

Russia (STV) Ex ia IIC T4

Certicate No. ROSS FI.GB04.V00634

Safety factors Ui = 28 V, Ii = 100 mA, Pi = 700 mW

Ci = 1 nF, Li = 0 H, T

Mechanics

3

Connections screw terminals, 0.33 ... 2.0 mm

v

= -20 °C ... +60 °C

amb

wires (AWG 14-22)
Cable bushing for 7.5..12mm or 10..15mm cable diameters (M20x1,5)
Conduit tting NPT 1/2" (M20)
Housing material G-AlSi10Mg (DIN 1725)
Housing classication IP66 (NEMA 4X)
Housing weight 950 g

Options and accessories

Additional analog output 4 ... 20 mA
Ball valve ISO 1/2 with welding joint ( for HMP368) BALLVALVE-1

pressure range at +20 °C (+68 °F): 0 ... 40 bar (0 ... 580 psia)

Serial interface cable for PC

connectors RJ45 - D9 female 25905ZZ
Sampling cell for HMP362 HMP302SC
Rain shield 215109
Calibration adapter for HMK15 211302
Sintered stainless steel lter HM47280
Galvanic isolator (EU) 212483
Zener Barrier (USA & Canada) 210664

(during installation max. 10 bar (145 psia)

= 100 mA,

max

= 60 °C(140 °F)

Class III

2

Classification with current outputs

Europe / CENELEC (PTB)

EU (94/9/EC, ATEX100a) II 1 G EEx ia IIC T4

Safety factors U

Environmental specications

T

amb

P

amb

Ref. B210768EN rev. A

= 28 V, Ii = 100 mA, Pi = 0.7 W

i

= 1 nF, Li = 0 H

C

i

-20 ... +60 °C (-4 ... 140 °F)

PTB 00 ATEX 2112 X

0.8 ... 1.1 bar

Cable bushing.

Conduit tting for wire
conduits.

HUMICAP® is a registered trademark of Vaisala.
Specications subject to change without prior notice.
© Vaisala Oyj

21Vaisala Instruments Catalog 2009