FS1600 Multi-Sensor Measuring Device with Digital Output

This multi-sensor measuring device can be built to order from the following measured variables: temperature, humidity (also heated), air pressure, differential pressure, air quality (CO, CO2, VOC, O2, fine particles), flow, brightness and motion. The sensor platform brings the main ambient conditions together in one compact, versatile instrument, with more than 200 configuration options. The digital output is Modbus RTU, with an integrated relay for further signal processing.

Thanks to the new hinged lock technology, this series of high-quality housings offers ideal space for the multi-sensor platform. External sensors are safely protected against outside influences by aluminum/stainless steel connections. A 4-inch backlit graphic LCD display shows all measured values and is also used to configure the devices through the user menu. The multi-sensor devices are ideal for workplaces, production facilities, warehouses, medical facilities and industry.

Register configuration

For the optional relay output, the switching threshold and hysteresis can be configured via a register. For the optional display, settings such as display content, orientation in 90° steps and backlight mode can also be specified via a register.

Specifications by module

CO sensor (A1)

• Measuring range: 0…1,000 ppm
• Accuracy: ±5 ppm + max. ±5% of measured value (at 20°C, 50% RH)
• Temperature dependence: ±5 ppm / K
• Response time (t90): < 5 min
• Long-term stability: ±1% FS/year
• Sensor type: Electrochemical gas sensor

CO2 sensor (A2, A22, A23)

• Measuring range A2: 0…10,000 ppm
• Measuring range A22: 0…20,000 ppm
• Measuring range A23: 0…50,000 ppm
• Accuracy: ±50 ppm + 2% of measured value at 0-2000 ppm, ±50 ppm + 3% of measured value at 0-5000 ppm, above that ±100 ppm + 5% of measured value (at 20°C, 1013 mbar, automatic calibration ON)
• Temperature dependence: ±5 ppm / K
• Pressure dependence: compensated if the “air pressure sensor” option is selected; otherwise 1.6% of measured value / kPa of difference from 1013mbar
• Response time (t90): < 1 min
• Long-term stability: ±1% FS/year
• Sensor type: Non-dispersive infrared sensor (NDIR)
• Automatic calibration: Automatic drift compensation takes place every 7 days, which ensures excellent long-term stability. In continuous operation, the device must be supplied with fresh air for at least 10 minutes within this interval.
• Manual calibration: Manual adjustment to 400 ppm can be carried out via a register command.

Oxygen sensor (A31, A32)

• Measuring range A31: 0…25% vol.
• Measuring range A32: 0…100% vol.
• Accuracy: ±5 µg/m³ + max. ±4% FS (@ 20°C, 45% RH, 1013 mbar)
• Temperature dependence: ±1% FS / 10 K
• Long-term stability: ±0.2% FS/year with automatic calibration ON
• Response time (t90): <1s

Mixed-gas air quality sensor, VOC (A4)

• Measuring range: 0-100% (good/poor air quality, relative to the calibration gas)
• Accuracy: ± 10% FS (at 20°C, 50% RH and automatic calibration ON)
• Temperature dependence: ±0.2% FS/K
• Response time (t90): < 1 min
• Long-term stability: ±5% FS/year (automatic calibration ON)
• Sensor type: Metal oxide sensor (VOC sensor)
• Automatic calibration: Automatic drift compensation takes place every 7 days, which ensures excellent long-term stability. In continuous operation, the device must be supplied with fresh air for at least 10 minutes within this interval.
• Manual calibration: The zero point can be adjusted manually to 10% via a register command.
• Sensitivity: Can be varied in three levels, up to 10%, via a register command.

PM2.5/PM10 particulate matter sensor (A51)

• Measuring range: 0 μg/m³ … 1000 μg/m³
• Accuracy: ±5 µg/m³ + max. ±4% FS (@ 20°C, 45% RH, 1013 mbar)
• Temperature dependence: ±1% FS / 10 K
• Long-term stability: ±1% FS/year
• Response time (t90): <10s

Flow transducer (F11 or F12, with pendulum sensor; mounting flange included in the scope of delivery)

• Measuring principle: Calorimetric measuring method
• Measuring range F11: 0…5 m/s
• Measuring range F12: 0…20 m/s
• Airflow calculation F11: 0-50,000 m³/h, formula and parameters via register
• Airflow calculation F12: 0-200,000 m³/h, formula and parameters via register
• Accuracy: ±0.3 m/s + max. ±4% FS (@ 20°C, 45% RH, 1013 mbar)
• Temperature dependence: ±1% FS/ 10 K
• Long-term stability: ±1% FS/year
• Response time (t90): <1s
• Operating range F11: 0.3…5 m/s
• Operating range F12: 0.3…20 m/s

Humidity/temperature transducer (H1T1 or H2T1, heated temporarily or permanently)

• RH measuring range: 0-100% RH
• Humidity accuracy: ±3% RH (30-70% RH, or ±5% RH, at 20°C)
• Temperature measuring range: -20°C…50°C
• Temperature accuracy: ±0.5 K
• Calculated thermodynamic values: Dew point temperature, absolute humidity, air-fuel ratio, enthalpy, wet-bulb temperature, vapor pressure
• Long-term stability: ±1% FS/year
• Sensors: Combined humidity and temperature sensor
• H1T1 sensor protection in the high humidity range: Condensation protection by a heating function above 95% RH (measured values are held during heating)
• H2T1 sensor protection in the high humidity range: Condensation protection by continuous heating, approx. 3 K above ambient temperature
• Flow rate: < 2 m/s

Motion sensor (M1)

• Measuring range: Motion yes/no, apex angle 90°/110° over 360°, range 10 m
• Response time (t90): < 1 s
• Sensor type: MTS 10/360 infrared motion sensor, photodiode

Pressure sensor (P2, P22 or P23)

• Measuring range P2: -100…+100 Pa
• Measuring range P22: -500…+500 Pa
• Measuring range P23: -5000…+5000 Pa
• Airflow calculation P2: 0…4,000 m³/h from differential pressure up to 100Pa, formula and parameters via register
• Airflow calculation P22: 0…20,000 m³/h from differential pressure up to 500Pa, formula and parameters via register
• Airflow calculation P23: 0…200,000 m³/h from differential pressure up to 5000Pa, formula and parameters via register
• Offset: Can be set in the register
• Output damping: Can be set in the register
• Pressure resistance: 5 times the measuring range
• Manual zero point adjustment: Manual zero point adjustment can be carried out

Air pressure sensor (P4)

• Atmospheric/barometric pressure measuring range: 500-1150 mbar
• Accuracy: ±3 mbar (at 20°C)
• Temperature dependence: 1 mbar / 10 K
• Linearity error: ±1% FS
• Offset: Can be set in the register
• Output damping: Can be set in the register

General data

• Supply voltage: 24V DC +/-5%
• Current consumption: Typically 100 mA (depending on the MODBUS parameters and backlight selected), plus about 20 mA per sensor
• Digital output: Modbus RTU
• Electrical connection: Plug-in terminal, tool-free and time-saving
• Display: Display programmable in 3 levels; optional customer-specific interfaces
• Housing: Polycarbonate PC UL 94 V0 with hinged locks, light gray
• Cable connection: 12mm
• Alarm sounder (piezo): Freely programmable, volume approx. 85 dB at a distance of 10cm
• Protection type, housing/electronics: IP65 (IP20 with the particulate matter and/or CO2 option)
• Protection type, sensor fittings: IP30
• Protection class: III
• Sensor protection: (1) r. / Temp, VOC, CO2
• Working and storage temperature: -20…+50°C
• Field of application: Ambient air monitoring, pollution-free, non-condensing air up to max. 98% RH (except harmful gases, according to the sensor specifications)
• Device attachments: V2A tubes and/or V2A sintered filter
• Plug/screw connector option: Steel M12, industrial standard
• Special features: When derived variables are calculated, depending on the sensor configuration, air pressure, air density, etc. are taken into account. If these values are not available internally from the sensors, the Modbus master can enter them in the corresponding register.