Humidity sensor PCE-P18
Humidity sensor measures temperature and air humidity / output as standard signal / compact / Modbus RTU interface / wall fastening

The humidity sensor PCE-P18 can be used to monitor air humidity and temperature in HVAC engineering. The humidity sensor PCE-P18 releases the measured indicator as a standard signal 4…20 mA (not galvanic isolated). Air humidity and temperature are detected accurately due to a semiconductor. For operation the humidity sensor PCE-P18 is supplied via direct current. The measuring data is then shown via a two-wire line. All connections are made via screwed-contacts with water-proof IP 65 enclosure. Aside from displaying the signal as a 4…20 mA signal the measuring data can also be read through a RS485 interface. This feature is especially useful if different measuring points are to be connected during your building monitoring. For further information about the humidity sensor PCE-P18 please read the following technical data or use our contact form. Our engineers and technicians will gladly advise you regarding the humidity sensor PCE-P18 or any other of PCE Instruments product in the areas of regulation and control or scales and balances. Here you will find a further humidity sensor with similar features or an overview of further humidity sensors for various fields of application in industry or research.

- Humidity- and temperature-sensor
- 4…20mA output
- Simple wall fastening
- RS-485 interface

- For constant monitoring
- Different filters deliverable
- Small measuring
- Modbus RTU

Technical data humidity sensor PCE-P18

Humidity

Measuring range

0 ... 100 %RH

Accuracy

± 2 % (for range of 10 % .... 90 % RH)
± 3 % (residual range)

Hysteresis

± 1 % RH

Temperature

Measuring range

- 20 ... 60 °C

Accuracy

± 0.5 % of measuring range

Temperature influence

± 25 % / 10 °C

Output humidity sensor

Electricity

4 ... 20 mA

Maximum suitable resistance at output

≤ 500 Ω

Data interface

RS-485 Modbus RTU

Mode of transmission

8N1, 8N2, 8E1, 8O1

Signal rate

4800 Bit/s
9600 Bit/s
19200 Bit/s
38400 Bit/s
57600 Bit/s

General technical data humidity sensor 

Voltage supply

19 V ... 30 V DC

Power

< 1.5 W

Surrounding temperature

- 30 °C ... 85 °C

Max. air humidity

≤ 95 % RH

Preheating time

15 minutes

Protection grade

IP 65

Montage

wall montage

Measures (AxHxD)

35 x 58 x 118 mm

Weight

125 g

4 ... 20 mA Interfaces

Both 4…20mA interfaces are not isolated galvanic from one another. To use both signals we advise you to use the signal converter PCE-P171

Delivery content:

1 x temperature converter PCE-P18, 1 x instruction manual

Available variations of humidity sensor PCE-P18

Humidity sensor PCE-P18-1

RS-485 Modbus Interface

Humidity sensor PCE-P18-2 

RS-482 Modbus interface with 4…20 mA output

Additional equipment for temperature converter PCE-P18

Diaphragm filter
PTFE laminated synthetic enclosure, porosity: 1 µm, temperature: max. 80° C, Reaction time up to T90: 15 s, for interiors with low contamination

PTFE filter
PTFE, sintered, porosity: 50 µm, temperature: max. 180° C, reaction time up to T90: 14 s, for application in chemistry

Sinter filter
bronze, sintered, porosity: 60 µm, reaction time up to T90: 10 s, for application in high pollution, protection against mechanic damage

Contact:
PCE Instruments UK Limited
Unit 11 Southpoint Business Park
Ensign Way, Southampton
United Kingdom, SO31 4RF
Phone: +44(0) 23 809 870 30
Fax: +44(0) 23 809 870 39

Contact:
PCE Americas Inc.
1201 Jupiter Park Drive, Suite 8
Jupiter 33458 FL
USA
Phone: +1-410-387-7703
Fax: +1-410-387-7714

Below you will find an overview of the different product groups of measuring instruments

Below you will find an overview of the different product groups of scales and scales