Original Figaro TGS3830 TGS3870 TGS1820 TGS8410 Gas Sensors

Original Figaro TGS3830 TGS3870 TGS1820 TGS8410 Gas Sensors

TGS3830 Specifications

Target Gas: R-134a (HFC-134a), also responds to some CFC refrigerants
Detection Range: 5 ~ 100 ppm Figaro Tech…
Heater Voltage VH: 0.8 V ±3%
Circuit Voltage VC: max 5.0 V DC
Heater Power Consumption: about 100 mW (typical value on datasheet, some sources say 120 mW)
Heater Room Temperature Resistance: 3.0 ±0.3 Ω
Sensor Resistance in Air Rs: 10 ~ 640 kΩ
Dimensions: Ø 0.362 × 0.335 inch, Weight: approx. 0.0388 oz
Standard Test Conditions: 20±2℃, 65±5% RH; Preheat 1 hour
Expected Lifetime: about 2000 h in air
Compliance: RoHS2 compatible Figaro Tech

TGS3870 Specs
Target Gas: Methane CH₄, Carbon Monoxide CO
Detection Range:
Methane: 1 ~ 25% LEL (B00/F00)
CO: 50 ~ 1000 ppm
Heater Voltage (20-second cycle):
VHH = 0.9 V DC ±3%, 5s(Methane sampling point)
VHL = 0.2 V DC ±3%, 15s (CO sampling point)
Circuit Voltage VC: 5.0 ±0.2 V DC
Load Resistance RL: >0.75 kΩ, software selectable
Heater Resistance at Room Temp RH: 3.0 ±0.3 Ω
Heater Power:
0.9V setting: 120 mW
0.2V setting: 11 mW
Average Power: 38 mW (low power, good for battery alarms)
Dimensions: Ø 0.362 × 0.512 inch, Weight: approx. 0.0388 oz
Standard Test Conditions: 20±2℃, 65±5% RH; Preheat required

TGS1820 Specifications
Target Gas: Acetone
Detection Range: 1 ~ 20 ppm
Circuit Voltage VC: 2.30 ±0.05 V DC
Load Resistance RL: 10 Ω ±1%
Power Consumption: 125 mW
Maximum Current: ≤ 85 mA
Output in Clean Air Vb: -370 ~ -290 mV
Signal Change for 1 ppm Acetone ΔV: 20 ~ 60 mV
Operating Temperature & Humidity: 0 ~ 40 ℃, 10 ~ 80% RH
Dimensions: Ø 0.232 × 0.486 inch, Weight: approx. 0.0247 oz
Compatible Evaluation Board: EM1820 (official evaluation module)
No dedicated standard socket, direct pin insertion

TGS8410 Parameters
Target Gas: Methane CH₄
Detection Range: 1 ~ 25% LEL
Heater Timing (Cycle 30s): VHH=1.9V, 0.1s; VHL=0V, 29.9s
Circuit Voltage VC: 2.0 V DC
Average Power Consumption: 87 μW (very low power)
Package: TO-5 Metal Case
Dimensions: Ø 0.362 × 0.492 inch, Weight: approx. 0.0494 oz
Features: Battery-powered, wireless gas leak detection, natural gas leak, long lifespan
Compatible Socket: SR-8