MICS-2610 ETC2 | Alldatasheet

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MiCS- 2610 Preliminary Data Sheet Rev 2 Page 1 of 4 MiCS – 2610 O 3 Gas Sensor This datasheet describes the use of the MiCS- 2610 in ozone detection applications. The package and the mode of operation described in this document target the detection of the oxidizing gas O 3 in indoor or outdoor environment s . Ozone is a hazardous gas, which can cause respiratory problems at concentrations above 100 ppb . Features:

  • Low heater current
  • Wide detection range
  • High sensitivity
  • Fast thermal response
  • Electro-Static Discharge protected
  • Miniature dimensions
  • High resistance to shocks and vibrations This Preliminary Data Sheet accompanies MicroChemical Systems MiCS- 2610 sensors for O 3 gas. Reproduction and distribution of this document is restricted by MicroChemical Systems. The following specifications are subject to change to accommodate continuous improvement.

MiCS- 2610 Preliminary Data Sheet Rev 2 Page 2 of 4 Sensor Characteristics Important Precautions: Please read the following instructions carefully before using the MiCS- 2610 sensor described in this document to avoid erroneous readings and to prevent the device from permanent damage.

  • Tin oxide ( SnO 2 ) gas sensors require a relatively long warm up period before correct O 3 measurements can be taken. It is important to follow the limits in the specifications (see Table 1) and to keep the sensor in the recommended powered operating mode until the signal reaches a stable level . After exposing the sensor to high concentrations of O 3 , make sure the sensor is given enough time to recover before taking new measurements.
  • The sensor must not be wave-soldered without protection or exposed to high concentrations of organic solvents or corrosive gases in order to avoid poisoning the sensitive layer. Use humidified gas for testing and calibration.
  • Heater voltages above the specified maximum rating of 2.5 V will destroy the sensor. An increase of 0.5 V at 2.35 V causes an increase of the heater temperature of about 100 ° C. The correct operating temperature is obtained by applying a heater voltage of 2.35 ± 0.05 V .
  • We strongly recommend using the operating mode and measurement circuit described in this document and referring to the heater voltage in the “Electric Specifications” section. Deviating from these procedures may produce varying results or damage the sensor.
  • For any additional questions, please contact us at: Operating Mode: The recommended mode of operation is a constant voltage mode. A heater voltage of V H = 2.35 V is applied. This causes the temperature of the sensing resistor (R S ) to reach about 430 ° C . Detection of the O 3 concentration is achieved by measuring the sensing resist or R S during operation . Sensor Response: The sensor response to O 3 in air is represented in Figure 1. The sensor resistance R S is normalized to the resistance under 100 pp b of O 3 (R 10 0pp b ). Measurement Circuit: Figure 2 shows the pin connections of the MiCS- 2610 ozone sensor. A simple circuit to measure the O 3 concentration is proposed in Figure 3. The heating voltage V H is applied to pins 3 and 1. A load resistor R L is connected in series with R S to convert the resistance R S to a voltage V S between pins 2 and 4. R S can then be calculated by the following expression: R S = R L /(V CC - V S ) ⋅ V S Figure 1: R S / R 10 0pp b as a function of gas concentration at 50% RH and 25 ° C. R S R H Pin Number

1 Heater Ground

2 Sensor Pin

3 Heater Power

4 Sensor Pin

Figure 2: Equivalent circuit (top view) of MiCS 2610 . Figure 3: Measurement circuit for O 3 detection. V S V CC V H Gas Sensor R L GND 3 2 0.01 0.1 10 100 1000 O 3 [ppb] R S / R 100ppb

MiCS- 2610 Preliminary Data Sheet Rev 2 Page 3 of 4 Electrical Specifications Maximum Ratings: Rating Symbol Value / Range Unit Maximum Heater Voltage V H 2.5 V Maximum Sensor Supply Voltage V CC 5 V Maximum Heater Power Dissipation P H 90 mW Maximum Sensor Power Dissipation P S 1 mW Relative Humidity Range R H 15 − 95 %RH Ambient Operating Temperature T amb 0 − 50 °C Storage Temperature Range T sto -40 − +70 °C Storage Humidity Range RH sto 15 − 95 %RH Table 1 Operating Conditions: Parameter Symbol Typ Min Max Unit Heating Voltage, V H 2.35 2.30 2.40 V Heating Current, IH 34 28 36 mA Heating Power, [1] P H 80 65 87 mW Heating Resistance, R H 69 66 81 Ω Table 2 [1] Min and Max values for the heating power are obtained by combining V H, min . with R H, max and V H, max . with R H, min , respectively. Sensitivity Characteristics: Characteristic Symbol Typ Min Max Unit O 3 Detection Range FS 10 10000 pp b Sensing Resistance at 50 ppm R S 7 0 * 2 0* 2 0 0 * k Ω Sensing Resistance at 100 ppm R S 14 0 * 4 0 * 4 00 * k Ω Sensitivity Factor [2] Table 3 [2] Sensitivity Factor S R is defined as R S at 100 pp b of O 3 divided by R S at 5 0pp b of O 3 . Test conditions are 50 ±5 %RH and 25 ±2°C . * Values are subject to changes before the final datasheet is published.

MiCS- 2610 Preliminary Data Sheet Rev 2 Page 4 of 4 Package Dimensions and Filter Dimension Min [mm] Max [mm] A 9 9.15 B 8.35 C 5.75 5.85 D 0.6 0.9 E 3.5 F 8.5 9.5 G 15 16 H 2.41 2.67 I 0.55 0.65 J 4.83 5.33 K 0.7 0.9 E F G A B C J D H I K