Environmental Monitoring Instruments
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Showing 8131–8160 of 8329 results
| Brand | YST (Dalian Yist) |
|---|---|
| Origin | Liaoning, China |
| Model | YST308B-MS880T |
| Measurement Range | 0–5000 mg/L SS, 0–80.0 °C |
| Accuracy | ±1.5% FS (SS), ±0.3 °C (Temp) |
| Resolution | 1 mg/L (SS), 0.1 °C (Temp) |
| Output | 4–20 mA & RS485 MODBUS RTU |
| Power Supply | 85–265 VAC ±10%, 50 ±1 Hz, ≤3 W |
| IP Rating | IP65 |
| Installation | Panel-mount / Wall-mount / In-line pipe mount |
| Operating Environment | −10 to +60 °C, ≤90% RH, non-corrosive, no strong magnetic field |
| Compliance | HJ 212–2017 (China Emission Monitoring Data Transmission Standard) |
| Brand | YST Instrument (Dalian) |
|---|---|
| Origin | Liaoning, China |
| Model | YST308B-MS880T |
| Measurement Principle | Transmittance-Scattering Hybrid Optical Method |
| Range | 0–5000 mg/L |
| Accuracy | ≤±2% FS |
| Resolution | 1 mg/L |
| Response Time (T90) | ≤10 s |
| Operating Temp. (Sensor) | −10–80 °C |
| Operating Temp. (Transmitter) | 0–50 °C |
| Humidity | ≤90% RH (non-condensing) |
| pH Compatibility | 2–12 |
| Output Signals | Isolated 4–20 mA analog + RS485 digital (Modbus RTU) |
| Power Supply | AC 220 V ±10% 50/60 Hz or DC 24 V ±10% |
| Enclosure Rating | Sensor IP68, Transmitter IP65 |
| Cleaning | Integrated Automatic Wiper System |
| Brand | YST (Dalian Yist) |
|---|---|
| Origin | Liaoning, China |
| Model | YST308B-MS880T |
| Measurement Range | 0–2000 NTU / 0–500 mg/L (switchable) |
| Accuracy | ±1.5% FS |
| Power Supply | AC 220 V ±10%, 50 Hz ±1 Hz or DC 24 V ±10% (optional) |
| Output Signal | 4–20 mA isolated (load < 750 Ω) |
| Ingress Protection | IP65 |
| Operating Temperature | 0–60 °C |
| Data Logging | 1 month @ 5-min intervals (non-volatile memory, 10-year data retention after power loss) |
| Installation | Flow-through sensor |
| Compliance | HJ 212–2017 protocol support for environmental monitoring platform integration |
| Brand | YST (Dalian Yist) |
|---|---|
| Origin | Liaoning, China |
| Model | YST308T-MS870Z |
| Measurement Principle | Infrared Light Scattering |
| Range | 0–50 g/L |
| Resolution | 0.01 g/L |
| Accuracy | ±1% FS |
| Sensor Operating Temp. | 0–60 °C |
| Host Operating Temp. | 0–50 °C |
| Humidity | ≤90% RH (non-condensing) |
| Power Supply | AC 220 V ±10%, 50/60 Hz |
| Sensor IP Rating | IP68 |
| Host IP Rating | IP65 |
| Response Time (T90) | ≤10 s |
| Output Signals | 4–20 mA (load ≤500 Ω), RS485 (Modbus RTU) |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST809B-DO660 |
| Measurement Principle | Fluorescence Quenching at 470 nm excitation |
| Range | 0–20 mg/L (standard), 0–50 mg/L or 0–20,000 ppb (trace) |
| Accuracy | ±0.2 mg/L (0–20 mg/L) |
| Resolution | 0.01 mg/L or 1 ppb |
| Operating Temperature | −5 to 50 °C |
| IP Rating | IP68 |
| Submersion Depth | Up to 30 m |
| Compensation | Automatic temperature, barometric pressure, and salinity compensation |
| Output Interfaces | RS485 (Modbus RTU), 4–20 mA analog |
| Response Time (t₉₀) | ≤30 s |
| Fluorescent Cap Lifetime | 1–3 years |
| Drift | <1% per year |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST809B-DO660 |
| Measurement Range | 0–20 mg/L DO / 0–200% saturation |
| Accuracy | ±0.1 mg/L (0–10 mg/L), ±0.2 mg/L (10–20 mg/L) |
| Temperature Compensation | 0–60 °C (automatic) |
| Response Time (t₉₀) | ≤60 s |
| Output Signals | 4–20 mA analog + RS485 digital (Modbus RTU) |
| Power Supply | AC 220 V ±10% or DC 24 V |
| Operating Environment | 0–50 °C, ≤90% RH (non-condensing) |
| Installation Options | Submersible, Flow-through, Pipe-mount |
| IP Rating | IP68 (sensor), IP65 (transmitter) |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST809B-DO660 |
| Measurement Principle | Fluorescence Quenching (Pt-porphyrin sensor) |
| Excitation Wavelength | 470 nm |
| Emission Detection | Phase-shift analysis of red fluorescence |
| Range | 0–20 mg/L (0–20,000 ppb) |
| Accuracy | ±0.2 mg/L (0–20 mg/L), ±1 ppb + 2% (ppb range) |
| Resolution | 0.01 mg/L or 1 ppb |
| Response Time (t₉₀) | ≤30 s |
| Operating Temperature | −5 to 50 °C |
| IP Rating | IP68 |
| Submersible Depth | Up to 30 m |
| Compensation | Automatic temperature, atmospheric pressure, and salinity compensation |
| Output | RS485 (Modbus RTU), 4–20 mA analog |
| Sensor Lifetime | 1–3 years (fluorescent cap) |
| Drift | <1% per year |
| Calibration | Air-saturated water auto-calibration |
| Installation Options | Immersion, flow-through, buoy-mounted |
| Brand | YST |
|---|---|
| Origin | Liaoning, China |
| Model | YST809B-DO660 |
| Measurement Range | 0.00–20.00 mg/L DO |
| Accuracy | ±0.5% FS |
| Fluorescent Cap Lifetime | ≥12 months (typical operation) |
| Temperature Compensation | Automatic, 0–50 °C |
| Enclosure Rating | IP68 |
| Communication Interface | RS485 |
| Power Supply | AC 220 V or DC 12 V (solar-compatible) |
| User Interface | Chinese LCD, one-button calibration |
| Brand | YST (Dalian Yistek) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0.01–200 mg/L as Cl₂ |
| Resolution | 0.001–0.1 mg/L |
| Accuracy | ±0.15% of full scale |
| Response Time (T90) | ≤120 s |
| Operating Temperature | 0–60 °C |
| Humidity Limit | <95% RH (non-condensing) |
| Sample Temp. | 0–45 °C |
| Sample Flow Rate | ≈500 mL/min |
| Sample Pressure | 0.1–0.3 bar |
| Power Supply | AC 100–240 V / DC 18–36 V |
| Power Consumption | 12–120 W |
| Enclosure Rating | IP65 |
| Brand | YST (Dalian Yist Environmental Technology Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | Free Chlorine 0–5 mg/L (extendable to 0–20 mg/L), Total Chlorine 0–10 mg/L (extendable to 0–50 mg/L) |
| Resolution | 0.01 mg/L |
| Accuracy | ±2% FS or ±0.02 mg/L (whichever is greater) |
| Response Time (T90) | ≤60 s |
| Operating Temperature | 0–50 °C |
| Relative Humidity | 10–90% RH (non-condensing) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 12–24 V |
| Output Signals | 4–20 mA analog, RS485 digital (Modbus RTU protocol) |
| Ingress Protection | IP65 |
| Calibration | Automatic (programmable interval) or manual |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Principle | Electrochemical and DPD-based Spectrophotometric Methods |
| Range (Electrochemical) | 0.01–200 mg/L as Cl₂ |
| Range (Spectrophotometric) | 0.0–10.0 mg/L as Cl₂ |
| Resolution (Electrochemical) | 0.001–0.1 mg/L |
| Resolution (Spectrophotometric) | 0.01 mg/L |
| Accuracy | ±0.15% of full scale or ±0.05 mg/L (whichever is greater) |
| Response Time (T90) | ≤120 s (electrochemical), ≤2.5 min (free chlorine), ≤3.5 min (total chlorine) |
| Operating Environment | 0–60 °C, <95% RH (non-condensing), vibration-free, well-ventilated indoor space |
| Power Supply | AC 100–240 V / DC 18–36 V |
| Power Consumption | ≤120 W |
| Enclosure Rating | IP65/IP66 |
| Output Interfaces | RS-232, RS-485, 4–20 mA analog output |
| Data Storage Capacity | 14,000 records |
| Auto-calibration & Self-diagnostic Functions | Yes |
| Sampling Interval | Programmable from 1 to 999 minutes |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–10 mg/L free chlorine |
| Accuracy | ±2% FS (0–5 mg/L) |
| Response Time | ≤60 s (T90) |
| Zero Drift | ≤±0.05 mg/L over 30 days |
| Span Drift | ≤±2% FS over 30 days |
| Operating Temperature | 0–50 °C |
| Relative Humidity | ≤85% RH (non-condensing) |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Output Signals | 4–20 mA analog output |
| Data Storage | 6-month timestamped history (local), USB export supported |
| Brand | YST (Dalian Yist) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Principle | Modified DPD Colorimetry + Membrane-Amperometric Sensor |
| Range | 0.01–10 mg/L Free Chlorine |
| Accuracy | ≤±0.01 mg/L (0.01–1 mg/L range) |
| Drift | ≤±0.03 mg/L over 72 h |
| Power Supply | AC 220 V ±10%, 50 Hz (solar-compatible option available) |
| Output | 4–20 mA analog + RS485 Modbus RTU |
| Environmental Rating | IP65 |
| Operating Temperature | 0–50 °C |
| Relative Humidity | 10–90% RH (non-condensing) |
| Data Storage | Internal logging with trend report export capability |
| Compliance | GB/T 5750.11–2006 |
| Brand | YST (Dalian Yist Environmental Technology Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | Free Chlorine 0–5 mg/L (extendable to 0–20 mg/L), Total Chlorine 0–10 mg/L (extendable to 0–50 mg/L) |
| Resolution | 0.01 mg/L |
| Accuracy | ±2% FS or ±0.02 mg/L (whichever is greater) |
| Response Time | ≤60 s (T90) |
| Operating Temperature | 0–50 °C |
| Humidity | 10–90% RH (non-condensing) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 12–24 V |
| Output Signals | 4–20 mA analog, RS485 digital (Modbus RTU protocol) |
| Ingress Protection | IP65 |
| Calibration | Automatic (programmable interval) or manual |
| Brand | YST (Dalian Yist Instrument Co., Ltd.) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–1 mg/L / 0–5 mg/L / 0–10 mg/L (selectable) |
| Resolution | 0.001 mg/L (low range), 0.01 mg/L (mid/high range) |
| Repeatability | ≤1% FS |
| Response Time (T90) | ≤60 s |
| Operating Temperature | Indoor: 0–50°C |
| Outdoor Explosion-Proof | −10–60°C |
| Humidity | ≤90% RH (non-condensing) |
| Sample Temperature | 0–50°C |
| Sample Pressure | 0.1–0.6 MPa |
| Output Signals | 4–20 mA analog, RS485/RS232 (Modbus RTU) |
| Alarm Outputs | 2 relay outputs (NO/NC, 220 VAC / 5 A) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 24 V |
| Sampling Modes | Flow-through (50–300 mL/min) or Immersion |
| Accuracy | ±2% FS (full scale) |
| Zero Drift (30 days) | ≤±0.05 mg/L |
| Span Drift (30 days) | ≤±2% FS |
| Auto Temperature & pH Compensation | Yes |
| Data Storage Capacity | >80,000 records |
| Update Rate | Up to 1 Hz |
| Brand | Dalian YST |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–1 mg/L / 0–5 mg/L / 0–10 mg/L (selectable) |
| Resolution | 0.001 mg/L (low range), 0.01 mg/L (mid/high range) |
| Repeatability | ≤1% |
| Response Time (T90) | ≤60 s |
| Operating Temperature | 0–50°C (indoor), –10–60°C (outdoor explosion-proof version) |
| Humidity | ≤90% RH (non-condensing) |
| Sample Temperature | 0–50°C |
| Sample Pressure | 0.1–0.6 MPa |
| Output Signals | 4–20 mA, RS485/RS232 (Modbus RTU) |
| Relay Outputs | 2 configurable (NO/NC, 220 VAC / 5 A) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 24 V |
| Sampling Modes | Flow-through (50–300 mL/min) and Immersion |
| Zero Drift | ±0.05 mg/L over 30 days |
| Span Drift | ±2% FS over 30 days |
| Compensation | Automatic temperature and pH compensation |
| Turbidity Tolerance | ≤100 NTU |
| pH Range for Stable Operation | 6–9 |
| Brand | YST (Dalian Yisite) |
|---|---|
| Origin | Liaoning, China |
| Model | YST909B-CH980 |
| Measurement Range | 0–1 mg/L / 0–5 mg/L / 0–10 mg/L (selectable) |
| Resolution | 0.001 mg/L (low range), 0.01 mg/L (mid/high range) |
| Repeatability | ≤1% |
| Response Time (T90) | ≤60 s |
| Operating Temperature | 0–50°C (indoor), –10–60°C (outdoor explosion-proof version) |
| Humidity | ≤90% RH (non-condensing) |
| Sample Temp. | 0–50°C |
| Sample Pressure | 0.1–0.6 MPa |
| Output | 4–20 mA analog, RS485/RS232 (Modbus RTU) |
| Relay Outputs | 2 configurable (NO/NC, 220 VAC/5 A) |
| Power Supply | AC 220 V ±10%, 50 Hz or DC 24 V |
| Sampling Modes | Flow-through (50–300 mL/min) and Immersion |
| Auto-Cleaning | Yes |
| Compliance | Designed for ISO 9001-manufactured systems |
| Brand | Yueweitang |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported Instrument |
| Model | TBM-3S |
| Instrument Type | Radiation Survey Meter / Dose Rate & Contamination Monitor |
| Detection Capabilities | α, β, γ radiation |
| Detector | 2-inch flat pancake GM tube |
| Measurement Units | cpm (counts per minute) and mR/h (milliroentgen per hour) |
| Range Settings | 0–500 / 0–5,000 / 0–50,000 cpm (corresponding to 0–0.15 / 0–1.5 / 0–15 mR/h) |
| Housing | Ruggedized 2.5-inch form factor |
| Operation | Single-hand ergonomic design |
| Linearity | Full-scale linear response across all ranges |
| Brand | YUFENGRUILIN |
|---|---|
| Model | YFR-105 |
| Measurement Principle | Diffusion-type scintillation cell |
| Detection Range | 5–100,000 Bq/m³ |
| Minimum Detectable Concentration | 5 Bq/m³ |
| Uncertainty | ±15% (k=2) |
| Response Time | ≤30 min (typical), down to 10 min under optimized conditions |
| Power Supply | Rechargeable 5000 mAh Li-ion battery (48 h continuous operation) + AC adapter |
| Operating Environment | −10 °C to +40 °C, ≤90% RH |
| Dimensions | 140 × 170 × 60 mm |
| Weight | 0.8 kg |
| Data Storage | 19,999 measurement records |
| Communication Options | Optional RS-485 interface (customizable for continuous online monitoring), optional Bluetooth printer support |
| Brand | YUFENGRUILIN |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | YFR-800A |
| Instrument Category | Alpha Spectrometry Sample Preparation System |
| Instrument Type | Laboratory Benchtop Unit |
| Sample Form | Aqueous Solutions |
| Input Voltage | 220 V ±10% AC, 50 Hz |
| Power Consumption | 200 W |
| Electrolysis Current Range | 0.1–5.0 A (adjustable in 0.02 A increments) |
| Current Stability | < ±0.2 A under load |
| Current Display Resolution | 0.01 A (LCD) |
| Electrode Rotation Speed | 60–600 rpm (continuously adjustable) |
| Speed Stability | ±5% (torque-dependent) |
| Speed Drift | < 1 rpm |
| Speed Display | Digital rpm readout (LCD) |
| Electrode Material | XM150 Platinum Disk Electrode with Protective Cap |
| Anode/Cathode Configuration | Rotating Pt anode + Fixed stainless steel cathode disk |
| Ventilation Rate | 200 L/min |
| Operating Temperature | 0–45 °C |
| Storage Temperature | −25–60 °C |
| Dimensions (W×H×D) | 325 × 650 × 325 mm |
| Weight | 7 kg |
| Construction Materials | Polyethylene terephthalate (PET), polyoxymethylene (POM), nylon, PVC, stainless steel, copper, nickel-plated brass |
| Front Panel | AG4 anodized aluminum |
| Safety | Zero-current shutdown on main power disconnection |
| Included Accessories | 2 × Pt wire electrodes, 50 electroplating disks, adjustable electrode holder, sample bottle fixtures (20 mL & 50 mL options), passive timer (1 min–9 h 59 min with audible alert), high-flow ventilation option available |
| Brand | Yuhong |
|---|---|
| Origin | Hubei, China |
| Model | TH-2000 |
| Pollutant Parameters | PM2.5, PM10, TSP, SO₂, NO₂, NO, NOₓ, O₃, CO, H₂S, NH₃ |
| Data Acquisition | 3×/minute (per parameter) |
| Communication | RS232/RS485, GPRS, CDMA, wired PSTN/broadband |
| Compliance | Meets Chinese National Standards for Ambient Air Monitoring (HJ 653–2013, HJ 654–2013, HJ 655–2013), supports EPA-equivalent data validation protocols |
| Brand | Yuhong |
|---|---|
| Origin | Hubei, China |
| Model | TH-2000PM Portable |
| Measurement Principle | Beta-ray Absorption (β-ray) |
| Measured Parameters | PM₁₀ and PM₂.₅ |
| Compliance | HJ 653–2013 |
| Display | 7-inch HD Touchscreen (Chinese UI) |
| Data Storage | Hourly internal logging |
| Communication | Built-in GPRS module, digital output interface |
| Optional Modules | Meteorological sensors (wind speed/direction), GPS, noise monitoring, video capture |
| Radiation Source | Low-activity ¹⁴C beta source (licensed per Chinese radiation safety regulations) |
| Brand | Yuhong |
|---|---|
| Origin | Hubei, China |
| Model | TH-2000PMc |
| Instrument Type | Continuous Emissions Monitoring System (CEMS) for Particulate Matter |
| Measurement Principle | Beta-ray attenuation (β-ray) |
| Sampling Flow Rate | 11 L/min (constant flow) |
| Cut-off Sizes | PM₁₀, PM₂.₅, PM₁.₀ (with optional cyclone cutters) |
| Regulatory Compliance | HJ/T 76–2007, U.S. EPA PS-11 |
| Measurement Uncertainty | ±1% FS |
| Repeatability | ≤1% RSD |
| Response Time (T₉₀) | ≤1 min |
| Zero/Drift Stability | ≤1% FS/24 h |
| Display | 7-inch capacitive touchscreen |
| Data Interface | USB, RS232, RS485, LAN, GPRS |
| Operating Environment | High-temperature, high-humidity flue gas streams |
| Power Backup | Built-in power failure protection |
| Brand | Yuhong |
|---|---|
| Origin | Hubei, China |
| Model | TH-2000Z1 |
| Measurement Principle | Tapered Element Oscillating Microbalance (TEOM) |
| Measured Parameters | PM₁₀ and PM₂.₅ |
| Sample Inlet Options | TSP, PM₁₀, PM₅, PM₂.₅, PM₁ |
| Flow Control | Mass Flow Controller |
| Volatile Compensation | Integrated dual-cycle zero-gas reference compensation |
| Display | 8.4-inch industrial-grade TFT color touchscreen (Chinese UI) |
| Compliance Context | Designed for continuous ambient air quality monitoring per EPA EQOA guidance and ISO 12103-1 reference practices |
| Power Management | Programmable pump duty cycle for energy-efficient operation |
| Brand | Yuhong |
|---|---|
| Model | TH-2001H |
| Detection Principle | Chemiluminescence (CLD) |
| Measurement Species | NO, NO₂, NOₓ (NO + NO₂) |
| Display | 7-inch full-touch color LCD |
| Concentration Units | ppb, ppm, µg/m³, mg/m³ |
| Automatic Range Switching | Yes |
| Temperature & Pressure Compensation | Integrated |
| Data Logging Interval | 5-minute resolution |
| Storage Capacity | High-capacity internal memory |
| Sampling System | Dual-path, time-shared single-channel with electromagnetic valve switching |
| O₃ Generator | Patented micro-ozone generator (ZL201220024333.0) |
| NO₂-to-NO Converter | Integrated catalytic converter with patented NO₂ reduction and O₃ removal module (ZL201020245767.8) |
| Remote Capabilities | Remote calibration, real-time diagnostics, parameter monitoring |
| Alarm Functions | Multi-parameter configurable alarms |
| Compliance Support | Designed for continuous ambient air monitoring per EPA Method 42, ISO 7935:1990, and EN 14211:2012 |
| Brand | Yuhong |
|---|---|
| Model | TH-2001H |
| Detection Principle | Chemiluminescence (CLD) |
| Measurement Parameters | NO, NO₂, NOₓ (calculated) |
| Display | 7-inch capacitive touchscreen |
| Units | ppb, ppm, µg/m³, mg/m³ (user-selectable) |
| Data Logging | Interval-stamped records every 5 minutes |
| Power Supply | Rechargeable Li-ion battery (≥5 h operation) + AC adapter |
| Operating Environment | 0–40 °C, 10–90% RH (non-condensing) |
| Compliance | Designed for field-deployable environmental monitoring per EPA Method 42 & ISO 7935 (principles), GLP-aligned data integrity |
| Gas Path | Dual-stream, time-shared single reaction chamber with catalytic NO₂-to-NO converter |
| Automatic Compensation | Temperature and barometric pressure |
| Connectivity | Remote calibration & diagnostics via embedded communication interface |
| Alarm | Multi-parameter configurable thresholds |
| Brand | Yuhong |
|---|---|
| Model | TH-2002H |
| Detection Principle | UV Fluorescence (214 nm excitation / 330 nm emission) |
| Detection Range | 0–10 ppm (selectable auto-ranging) |
| Resolution | 0.1 ppb |
| Accuracy | ±2% FS |
| Response Time (T90) | <60 s |
| Operating Temperature | −20 °C to +50 °C |
| Power Supply | Rechargeable Li-ion battery (≥10 h continuous operation) |
| Display | 7-inch capacitive touchscreen |
| Data Logging | Internal storage ≥12 months @ 5-min intervals |
| Compliance | Meets GB/T 15438–1995, EPA Method RFNA-01 (UV Fluorescence), ISO 7935:1990 (Ambient Air – SO₂ Measurement) |
| Brand | Yuhong |
|---|---|
| Model | TH-2003H |
| Detection Principle | UV Absorption at 254 nm |
| Display | 7-inch capacitive touchscreen |
| Concentration Units | ppb, ppm, µg/m³, mg/m³ |
| Data Logging Interval | 5 minutes |
| Battery Life | >10 hours (rechargeable Li-ion) |
| Flow Path Materials | PTFE (Teflon®) |
| Auto Range Switching | Yes |
| Temperature & Pressure Compensation | Integrated |
| Remote Diagnostics & Calibration Support | Yes |
| Alarm Functions | Multi-parameter configurable |
| Power Supply | AC/DC dual-mode |
| Brand | Yuhong |
|---|---|
| Model | TH-2004H |
| Measurement Principle | Gas Filter Correlation Infrared Absorption (GFC-IR) at 4.6 µm |
| Detection Range | Configurable across ppb to ppm levels |
| Output Units | ppb, ppm, µg/m³, mg/m³ |
| Display | 7-inch capacitive touchscreen |
| Data Logging | One record per 5 minutes with timestamped storage |
| Environmental Compensation | Automatic temperature and pressure compensation |
| Calibration | Remote zero/span calibration and internal diagnostic access |
| Compliance | Designed for ambient air monitoring per EPA Method TO-11A principles |
| Alarm Functions | Multi-threshold, user-configurable concentration alarms |
| Rotating Filter Wheel | Precision-machined, long-life CO/N₂ dual-channel correlation wheel |
| Signal Processing | Adaptive optimization algorithm for dynamic response time and SNR balancing |
| Software Interface | Menu-driven Chinese GUI with real-time waveform zoom, scaling, and historical trend replay |
| Data Export | USB mass storage or optional Ethernet/RS485 interface |
| Brand | Yuhong |
|---|---|
| Model | TH-2008H |
| Origin | Hubei, China |
| Flow Control | Dual Mass Flow Controllers (MFCs) |
| O₃ Generation | Integrated ozone generator with 18-point calibration |
| NO₂ Generation | Quantitative NO₂ standard gas via gas-phase titration (GPT) |
| Display | 7-inch full-touch color LCD |
| Interface | Chinese menu system |
| Programmability | Up to 99 program/sequence segments |
| Environmental Compensation | Automatic temperature & pressure compensation |
| Communication | RS232, RS485, USB, Ethernet |
| Remote Capability | Remote zero/span command execution and internal parameter diagnostics |
| Alarm System | Multi-parameter fault alerting |
| Compliance | Designed for EPA, ISO 16140, EN 14625, and US EPA Method 213/214 alignment |