Rotronic CL11 Specifications

DISPLAY FOR CO2, HUMIDITY AND TEMPERATURE MEASUREMENT

CO

DISPL AY

2

MONITORING
OF INDOOR AIR QUALITY

• Measures and records CO2, relative humidity and temperature

• Accuracy ±2.5 %RH / ±0.3 K / ±30 ppm + 5% of measured value

• ROTRONIC HYGROMER

• 18,000 data point memory for CO

• Display of date and time

®

IN-1 humidity sensor

, humidity and temperature values

2

• Adjustable, visual CO

• Large, easy-to-read display

• USB access for data download

indicator

2

BE PRECISE:

THE MAIN ADVANTAGES AT A GLANCE

The wall-mounted or bench-top CO2 display is the latest development of an inexpensive display unit that
simultaneously measures and records CO2, humidity and temperature. Equipped with the fi eld-tested ROTRONIC

®

HYGROMER
confi gured directly with buttons and stored data can be exported to a USB stick for analysis with the free
ROTRONIC software package SW21.

Features

• Display for mounting on walls
or bench-top use

• Data recording function

IN-1 humidity sensor, this instrument offers unbeatable value for money. The instrument can be

Display

• Large, easy-to-read display of measured values

• CO

indicator for quick recognition

2

of air quality (GOOD/NORMAL/POOR)

• REC LED to indicate data
recording is in progress

• Display of date and time

Use

• Readily accessible buttons for easy use

Connections

• USB access for data downloads

• 12 VDC power supply

Humidity Sensor and Calibration

• HYGROMER

• Calibration of humidity possible at 35/80 %RH

®

IN-1 humidity sensor

CO

Sensor and Calibration

2

• NDIR sensor with automatic
calibration

• Calibration of CO
any value between 0 and 990 ppm

at 0/400 ppm or

2

APPLICATIONS

Indoor Air Quality

Classrooms, Kindergartens Meeting Rooms, Open-Plan

Offices

Shopping Centers, Fitness
Studios

PRINCIPLES

The wall-mounted or bench-top CO2 display evaluates the quality of air with a combined measurement of CO2, humidity and
temperature. A high concentration of carbon dioxide can develop quickly when closed rooms with defi cient ventilation are fi lled
with people. Carbon dioxide (CO
high concentrations. The proportion of CO
this gas, it mixes quickly with the ambient air. A high CO
of concentration. The negative effects become noticeable that more quickly in small rooms in which there are many people (e.g.
conference rooms). In order to initiate suitable countermeasures such as an increase in the supply of fresh air, it is important to
measure not only parameters such as relative humidity and temperature, but also the CO

Guidelines

350 - 450 ppm

0.035 - 0.045 %vol

600 - 1,200 ppm

0.06 - 0.12 %vol

) is a colorless and odorless gas that exists in the earth’s atmosphere and which is dangerous in

2

in natural ambient air is about 0.04 % or 400 ppm. When humans and animals exhale

2

content becomes apparent in humans through rapid fatigue and loss

2

content.

2

> 1,000 ppm

> 0.1 %vol

5,000 ppm

0.5 %vol

38,000 ppm

3.8 %vol

> 100,000 ppm

10 %vol

Fresh air outdoors Room air Fatigue and loss

of concentration

become apparent

Maximum permissible

value at the workplace

during an 8-hour

workday

Breathing air

(direct exhalation)

Nausea, vomiting,

loss of consciousness

and death

130

65

TECHNICAL INFORMATION

General

Type Wall or bench-top display
Parameters CO
Range of application 0…50 °C / 0…95 %RH, non-condensing
Power supply AC adapter 12 VDC
Clock Real time clock
Alarm/Indicator Adjustable for CO

Technical Information / Functions

Current consumption 700 mA (max)
Warm-up time <1 min.
Memory capacity 18,000 values with time stamp,

Dimensions

250

330

65

130

Suitable Accessories

Art. No. Description

ER-15 Humidity calibration device
EA35-SCS Humidity standard 35 %RH
EA80-SCS Humidity standard 80 %RH
CO2 CALIBRATOR Zero calibration kit

52

CO2 Measurement

Measurement principle Infrared (NDIR) with automatic calibration (ABC)
Measurement range 0…5000 ppm
Accuracy at 23 °C ±5 K ±30 ppm ±5 % of the measured value
Response time <3 min. diffusion time
Adjustment points 0, 400 ppm or any value between 0 and 990 ppm
Pressure dependence +1.6 % reading per kPa
Null drift <10 ppm/year
Maintenance No maintenance (standard indoor application)

Humidity Measurement

Humidity sensor ROTRONIC HYGROMER® IN-1
Measurement range 0...100 %RH
Accuracy at 23 °C ±5 K <2.5 %RH (10...90 %RH)
Adjustment points 35, 80 %RH
Response time τ63 <30 s, without fi lter
Long-term stability <1.5 %RH / year

Temperature Measurement

Sensor NTC
Measurement range -20...60 °C
Accuracy at 23 °C ±5 K ±0.3 °K
Response time 4 s

Software

As download (SW21)
www.rotronic.com

Conformities / Housing

CE / EMC compatibility CE conformant 2004/108/EC
Housing material ABS
Dimensions 330 x 250 x 50 mm
Weight 1400 g

, relative humidity and temperature

2

measurement

2

automatic recording (%RH / °C / ppm)

Display and evaluation of the measured values

ROTRONIC AG, Grindelstrasse 6, CH - 8303 Bassersdorf, Tel. [phone], Fax [phone], www.rotronic.ch

ROTRONIC Instruments (UK) Ltd, Crompton Fields, Crompton Way, Crawley, West Sussex, RH10 9EE, UK, Phone [phone], Fax [phone], www.rotronic.co.uk

ROTRONIC Instrument Corp, 135 Engineers Road, Hauppauge, NY 11788, USA , Phone, [phone], Fax, [phone], www.rotronic-usa.com

59039E/2013-09