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$58.10
HUABAN 1PCS MQ-138 MQ138 Formaldehyde HCHO Volatile Organic Compounds (VOC) Gas Sensor Module with Alarm Signal Light
★★★★★
$58.10
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About this item
- MQ-138 Formaldehyde HCHO Gas Sensor Module
- Heating voltage: 5 +0.2V (AC·DC);Working current: 180mA;Circuit voltage: DC5V (Max DC24V);Clean air voltage: < 1.5V
- Test concentration range :1-100ppm ; Sensitivity: >3% ; Response time: < 1S (3-5 minute warm-up, theory preheating time 48 hours)
- Working temperature: -10 ~ 50 oC (nominal temperature 20 oC) ; Humidity: 95% RH (nominal humidity 65% RH)
- Size: 35mm×40mm×28mm
Product description
Features: 1, Heating voltage: 5 ±0.2V (AC·DC) 2, Working current: 180mA 3, Circuit voltage: DC5V (Max DC 24V) 4, Load resistance: 10K (adjustable) 5, Test concentration range :1-100ppm 6, Clean air voltage: <1.5V 7, Sensitivity: > 3% 8, Response time: <1S (3-5 minute warm-up, theory preheating time 48 hours) 9, Response time: <30S 10, Component power consumption: <0.9W 11, Working temperature: -10 ~ 50 oC (nominal temperature 20 oC) 12, Humidity: 95% RH (nominal humidity 65% RH) 13, Life: 5 years 14, Size: 35mm×40mm×28mm 15, Weight Size: 15g (approximately)
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What customers say about Bigamart
10 Trustpilot reviews total, with 2 shown at a time.
Trustpilot
★★★★★
Excellent
4.5 average rating
S
Sigalit
🇮🇱 · January 2026
★★★★★
I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.
V
Verified buyer
🇦🇺 · November 2025
★★★★★
The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.
Showing 1–2 of 10 reviews
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