P18(D/L) Temperature and Humidity Transducers

Basic parameters:

range of relative humidity measurement (RH)

0...100% without condensation1)

basic error of humidity conversion

± 2% of the range for RH = 10...90%
± 3% for the remaining range

hysteresis for humidity measurement

± 1%

range of temperature measurement (T)

- 20...60ºC2)

basic error of temperature conversion

± 0.5% of the range

calculated quantities

absolute humidity (a) [g/m3]
dew-point temperature (Td) [ºC]

additional errors:
temperature influence

± 25% of the basic error/10ºC

RS-485 digital output:

transmission protocol

MODBUS

baud rate

4800, 9600, 19200, 38400, 57600 bit/s

mode RTU:

8N2, 8E1, 8O1, 8N1

maximal response time

300 ms

Analog output (optional):

current

4...20 mA

voltage

0...10 V

maximal load capacity of the current output

100 Ω

minimal load capacity of the voltage output

1k Ω

Rated operating conditions:

supply

9...24 V a.c./d.c.

consumption

< 0.5 VA

ambient temperature

- 30...23...85ºC

relative air humidity

< 95% 3)

rate of air flow

≥ 0.5 m/s4)

preheating time

15 minutes

protection degree ensured by the housing

IP 65

weight

125g

fixing

on a wall

working position:

- in applications non-exposed to a direct contact with water: any
- in applications exposed to a direct contact with water: with the
sensor chamber directed towards the ground.

Electromagnetic compatibility:

noise immunity

acc. to EN 61000 -6-2

noise emission

acc. to EN 61000 -6-4

Security requirements acc. to EN 61010-1

installation category

III

pollution level

2

phase-to-earth working voltage

50 V

Basic parameters:

range of relative humidity measurement

(RH) 0...100% without condensation1)

basic error of humidity conversion1)

± 2% for RH = 10...90% ± 3% for the remaining range

hysteresis for humidity measurement

± 1% RH

range of temperature measurement (T)

- 20...60ºC

basic error of temperature conversion

± 0.5% of the range

additional errors: - temperature influence

± 25% of the basic error/10ºC

Analog output

current

4...20 mA

maximal load capacity of the current output

500 Ω

Rated operating conditions:

supply¹

19...30 V d.c.

consumption

< 1.5 VA

ambient temperature

- 30...23...85oC

relative air humidity

< 95%
(admissible condensation of water vapour)

rate of air flow

2 m/s

preheating time

15 minutes

protection degree ensured by the housing

IP 65

weight

125 g

dimensions

(35 x 58 x 118) mm

fixing

on a wall

working position

- in applications non-exposed to a direct contact with water: any
- in applications exposed to a direct contact with water: with the sensor
chamber directed towards the ground.

Electromagnetic compatibility:

immunity

acc. to EN 61000 -6-2

emission

acc. to EN 61000 -6-4

Security requirements acc. to EN 61010-1

installation category

III

pollution grade

2

working voltage in relation to earth

50 V

Transducer without analog outputs

Transducer with current outputs

Transducer with voltage outputs

Design

Shield code

Name

Construction

Features

Typical application

0874-490-016

Membrane
filter

Casing made of PC
membrane of PTFE
laminated by a film.
Pore size:1 μm

Mean filtration effect.
Maximal temp.: up to 80ºC
Response time t10/90: 15 s

Building automation.
For application in
rooms with low
pollution.

0874-490-015

Filter made
in PTFE

Sintered PTFE
Pore size 50 μm

High chemical resistance
Maximal temp.: up to 180ºC
Response time t10/90: 14 s

Drying process
in chemical
applications.

0874-490-014

Filter made
of sintered
bronze

Sintered bronze
Pore size: 60 μm

High mechanical resistance.
To co-operate with high
pollution.
Applied at small air humidity.
Response time t10/90: 10 s

Agricultural
applications