Sper Scientific Air Quality Detector
Operation Manual
1. Product Introduction
This is a high-performance home air quality detector designed to monitor PM2.5, HCHO, TVOC, CO, and CO2 gas concentrations, along with temperature and humidity. It utilizes a high-precision laser dust sensor, electrochemical HCHO sensor, semiconductor air quality sensor, and temperature and humidity sensor, ensuring reliable measurement data and stable performance. The instrument features a 3.2-inch color LCD display and provides voice alarms and prompts. It stores data records for the last 8 hours, accessible via the history interface.
2. Indoor Air Quality Standards
| Parameter | Unit | Standard Values | Remark |
| HCHO | mg/m³ | 0.10 | 1-hour average |
| TVOC | mg/m³ | 0.60 | 8-hour average |
| PM2.5 | µg/m³ | ≤35 | Excellent |
| 35-115 | Good | ||
| 115-150 | Normal | ||
| >150 | Bad |
Note: Based on GB/T18883-2002 Indoor Air Quality Standard and HJ633-2012 Ambient Air Quality Index (AQI) Technical Regulations (Trial).
3. Applications
This product is suitable for air concentration testing in confined spaces such as homes, offices, and areas with wooden furniture or leather goods.
4. Main Features
- 3.2 inch Color LCD display.
- Real-time measurement of PM2.5, HCHO, TVOC concentrations, temperature, and humidity.
- Built-in memory records data for the last 8 hours, viewable through the interface.
- Continuous battery power monitoring with a low power reminder function.
- Live voice prompts and alarm functions.
- Switchable between Chinese and English languages.
- One-click on/off for voice function for convenient operation.
5. Technical Parameters
a). Measuring Range
| Parameter | Range |
| HCHO | 0-1.999 mg/m³ |
| TVOC | 0-9.999 mg/m³ |
| PM2.5 | 0-999 µg/m³ |
b). Other Parameters
| Parameter | Details |
| Screen | 3.2 inch color LCD display, resolution of 320 × 240 |
| Working Temperature | 0 ~50 °C |
| Working Humidity | ≤90% RH |
| Power Supply | 1500mAh lithium battery |
| Charger | 5VDC-1.5A |
| Charging Interface | Type-C |
| Weight | About 240g |
6. Device Components
The device includes the following components:
- Vent
- Display screen
- Function keys
- Power switch
- Type-C interface
- Support frame
7. Key Description
The device features several function keys:
- Mute [?]
- Setting [⚙️]
- Return [↩️]
- Left [<]
- Right [>]
8. Operation Instructions
a). Power On
When the instrument is off, push the power switch up to enter the preheating interface, then proceed to the main interface.
b). Public Information
When the instrument is off, push the power switch up to enter the preheating interface, then proceed to the main interface.
c). Main Interface
The main interface displays real-time measurements of temperature and humidity, HCHO concentration, PM2.5 concentration, TVOC concentration, CO and CO2 concentration, and the Air Quality Index (AQI).
Display Indicators:
- Speech state [?️]
- Battery capacity [?]
- Temperature [?️]
- Humidity [?]
- HCHO concentration
- TVOC concentration
- PM2.5 concentration
- CO2 concentration
- CO concentration
- Air quality level [?]
d). Setting Up the Selection Interface
- Under the main interface, press the "Settings" key [⚙️] to enter the Settings selection interface.
- The Setup selection interface includes: system settings, history, sensor correction, and data correction.
- Press the left [<] and right [>] buttons to switch between menu items. Press the Settings key [⚙️] to enter the corresponding interface, and press the Return key [↩️] to return to the main interface.
e). System Setup Interface
- Select "System Settings" in the Settings selection interface and press the Settings key [⚙️] to enter the System Settings interface.
- System settings include: temperature unit, alarm point, history clear, sleep time, language switching, screen brightness, display style, and key sound.
- In the system setup interface, press the left [<] and right [>] keys to switch over the selected menu items, and press Settings [⚙️] to enter the currently selected menu item.
- A pop-up appears after the previous step. Press left [<] and right [>] to switch options and press Settings [⚙️] to set the selected options.
- In the system setup interface, press Back [↩️] to return to the Setup selection interface.
f). History Record Interface
- Select "History" in the Settings selection interface and press Settings [⚙️] to enter the history interface.
- At the history interface, press Left [<] and Right [>] to check the history of PM2.5, TVOC, HCHO, temperature, and humidity.
- In the History interface, press Back [↩️] to return to the Settings selection interface.
History Interface Details:
- History Items [?]
- History maximum value [?]
- Y-axis: Alarm value [⚠️]
- History Curve [?]
- X-axis: Time [⏰]
- Calibration Tips [?]
- TVOC Real-Time Value [?]
- Progress bar [?]
g). Sensor Correction Interface
- Select "Sensor Correction" in the Settings selection interface, press the Setup button [⚙️] to enter the sensor correction interface, and a prompt pop-up will appear.
- The Sensor correction interface displays the TVOC sensor correction and the real-time concentration of TVOC.
- Follow the prompts in the pop-up window. Press the "Setting" key [⚙️] to start the correction. Press "Return" [↩️] before the correction is completed to exit and return to the setting selection interface.
- The interface will then prompt "Correction Complete".
- Under the sensor correction interface, press the Return key [↩️] to return to the setup selection interface.
h). Data Modification Interface
- Select "Data Correction" in the setting selection interface and press the Settings key [⚙️] to enter the data correction interface.
- The data correction interface includes five data corrections: formaldehyde, TVOC, PM2.5, temperature, and humidity. Switch selection menu items using the "left" [<] and "right" [>] keys, and press the "Setup" key [⚙️] to modify the corresponding data.
- If data is not modified, pressing the Return key [↩️] at the data correction interface will return directly to the setting selection interface.
- If data is modified, pressing the "Return" key [↩️] in the data correction interface will bring up a prompt. Press the "Setting" key [⚙️] to save the modification and then return to the Setup selection interface.
Note for Data Modification:
- '+' Represents a previous value plus this value.
- '-' Represents a previous value minus this value.
i). Power Off
When the instrument is on, push the power switch down to complete the shutdown.
Alarm Prompt
- The color of the number display indicates air quality: green for good, yellow for generally or slightly polluted, and red for serious pollution.
- Voice alarm or prompt:
- When HCHO concentration exceeds the preset concentration for more than one minute (threshold set in system settings), a voice prompt "gas concentration exceeds the standard" will be heard.
- When the battery power is low, a voice prompt "battery power is insufficient" will be heard, indicating the need to charge the machine promptly.
- When the gas concentration exceeds the measured range, the voice prompt will be "exceeds the measurement range".
