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43% off
1PC EC TEMP Meter/ TDS TEMP Tester Digital Conductivity Water Quality Water Quality Tester 0-5000ppm/0-9999US for Pool Aquarium 1PC EC TEMP Meter/ TDS TEMP Tester Digital Conductivity Water Quality Water Quality Tester 0-5000ppm/0-9999US for Pool Aquarium

1PC EC TEMP Meter/ TDS TEMP Tester Digital Conductivity Water Quality Water Quality Tester 0-5000ppm/0-9999US for Pool Aquarium

$14.05$24.65

2 sold
28% off
MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

$21.48$29.84

11% off
2018 New TDS EC Meter Temperature Tester Pen 3 In1 Function Conductivity Water Quality Measurement Tool TDS&EC Tester 0-5000ppm 2018 New TDS EC Meter Temperature Tester Pen 3 In1 Function Conductivity Water Quality Measurement Tool TDS&EC Tester 0-5000ppm

2018 New TDS EC Meter Temperature Tester Pen 3 In1 Function Conductivity Water Quality Measurement Tool TDS&EC Tester 0-5000ppm

$4.94$5.55

1 sold
ZE610-H2 H2 Module Gas Detector H2 Module Detector Electrochemistry Gas Sensor Module H2 Sensor Gas

ZE610-H2 H2 Module Gas Detector H2 Module Detector Electrochemistry Gas Sensor Module H2 Sensor Gas

$12.86$12.86

16% off
Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm 3in1 FunctionTDS Conductivity Water Liquid Quality Tools Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm 3in1 FunctionTDS Conductivity Water Liquid Quality Tools

Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm 3in1 FunctionTDS Conductivity Water Liquid Quality Tools

$4.55$5.42

50% off
TDS Tester EC Meter Water Quality Purity Tester Conductivity Meter TDS Meter Monitor Detector 3-in-1 0-5000ppm TDS & EC TDS Tester EC Meter Water Quality Purity Tester Conductivity Meter TDS Meter Monitor Detector 3-in-1 0-5000ppm TDS & EC

TDS Tester EC Meter Water Quality Purity Tester Conductivity Meter TDS Meter Monitor Detector 3-in-1 0-5000ppm TDS & EC

$15.36$30.72

28% off
C8D SC8 C8 NDIR Infrared IR CO2 Carbon Dioxide Sensor High Precision Gas Concentration Detection Module 400-5000PPM 0-5000PPM C8D SC8 C8 NDIR Infrared IR CO2 Carbon Dioxide Sensor High Precision Gas Concentration Detection Module 400-5000PPM 0-5000PPM

C8D SC8 C8 NDIR Infrared IR CO2 Carbon Dioxide Sensor High Precision Gas Concentration Detection Module 400-5000PPM 0-5000PPM

$5.99$8.32

8 sold
0~5000ppm HT621 Carbon Monoxide Detector Sound and Light Alarm Professional High Precision CO Gas Tester LCD Backlight Display 0~5000ppm HT621 Carbon Monoxide Detector Sound and Light Alarm Professional High Precision CO Gas Tester LCD Backlight Display

0~5000ppm HT621 Carbon Monoxide Detector Sound and Light Alarm Professional High Precision CO Gas Tester LCD Backlight Display

$31.85$31.85

39% off
yieryi 3 in 1 TDS Tester Conductivity Meter Water Measurement Temperature Tool Function 0-5000ppm EC Meter Arrived 30% off yieryi 3 in 1 TDS Tester Conductivity Meter Water Measurement Temperature Tool Function 0-5000ppm EC Meter Arrived 30% off

yieryi 3 in 1 TDS Tester Conductivity Meter Water Measurement Temperature Tool Function 0-5000ppm EC Meter Arrived 30% off

$6.10$10.00

2 sold
11% off
HT621 Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge LCD Display Sound and Light Alarm 0~5000ppm HT621 Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge LCD Display Sound and Light Alarm 0~5000ppm

HT621 Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge LCD Display Sound and Light Alarm 0~5000ppm

$25.09$28.24

11 sold
73% off
3In1 Function Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm TDS Conductivity Water Liquid Quality Tools 3In1 Function Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm TDS Conductivity Water Liquid Quality Tools

3In1 Function Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm TDS Conductivity Water Liquid Quality Tools

$3.21$11.88

1 sold
7% off
HT621 Handheld Carbon Monoxide Meter 0~5000Ppm High-Precision CO Detector with Audible & Visual Alarm LCD Display CO Gas Tester HT621 Handheld Carbon Monoxide Meter 0~5000Ppm High-Precision CO Detector with Audible & Visual Alarm LCD Display CO Gas Tester

HT621 Handheld Carbon Monoxide Meter 0~5000Ppm High-Precision CO Detector with Audible & Visual Alarm LCD Display CO Gas Tester

$31.21$33.80

59% off
10PCS/LOT TDS Tester, EC meter, conductivity meter, water measurement tool,Function 3 in 1, 0-5000ppm,High Quality 10PCS/LOT TDS Tester, EC meter, conductivity meter, water measurement tool,Function 3 in 1, 0-5000ppm,High Quality

10PCS/LOT TDS Tester, EC meter, conductivity meter, water measurement tool,Function 3 in 1, 0-5000ppm,High Quality

$24.97$60.90

4 sold
28% off
MH-Z19 MH-Z19C MH-Z19E MH-Z19B IR Infrared CO2 Sensor Carbon Dioxide Gas Sensor Module CO2 Monitor 400-5000 0-5000ppm UART PWM MH-Z19 MH-Z19C MH-Z19E MH-Z19B IR Infrared CO2 Sensor Carbon Dioxide Gas Sensor Module CO2 Monitor 400-5000 0-5000ppm UART PWM

MH-Z19 MH-Z19C MH-Z19E MH-Z19B IR Infrared CO2 Sensor Carbon Dioxide Gas Sensor Module CO2 Monitor 400-5000 0-5000ppm UART PWM

$10.23$14.21

26 sold
16% off
Aquarium Pool Water 0.0-14.0pH Digital PH Tester+Digital TDS EC Meter 0-5000ppm tds&0-9990us/cm Conductivity Meter With Bag Aquarium Pool Water 0.0-14.0pH Digital PH Tester+Digital TDS EC Meter 0-5000ppm tds&0-9990us/cm Conductivity Meter With Bag

Aquarium Pool Water 0.0-14.0pH Digital PH Tester+Digital TDS EC Meter 0-5000ppm tds&0-9990us/cm Conductivity Meter With Bag

$10.07$11.99

50% off
WIFI Air Quality Meter 12 In 1 PM2.5 PM10 HCHO AQI Temperature And Humidity Tester Carbon Dioxide Detector 0-5000PPM WIFI Air Quality Meter 12 In 1 PM2.5 PM10 HCHO AQI Temperature And Humidity Tester Carbon Dioxide Detector 0-5000PPM

WIFI Air Quality Meter 12 In 1 PM2.5 PM10 HCHO AQI Temperature And Humidity Tester Carbon Dioxide Detector 0-5000PPM

$137.25$274.50

50% off
MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR compatible with S8 0053 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR compatible with S8 0053

MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR compatible with S8 0053

$149.99$299.99

18% off
High Quality 2000/5000ppm/1%/3%/65% RS485 4-20mA Carbon Dioxide Meter CO2 Sensor Transmitter 4-20ma CO2 Transducer High Quality 2000/5000ppm/1%/3%/65% RS485 4-20mA Carbon Dioxide Meter CO2 Sensor Transmitter 4-20ma CO2 Transducer

High Quality 2000/5000ppm/1%/3%/65% RS485 4-20mA Carbon Dioxide Meter CO2 Sensor Transmitter 4-20ma CO2 Transducer

$177.02$215.88

12 sold
28% off
MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

$15.18$21.09

21 sold
43% off
1PC EC TEMP Meter/ TDS TEMP Tester Digital Conductivity Water Quality Water Quality Tester 0-5000ppm/0-9999US for Pool Aquarium 1PC EC TEMP Meter/ TDS TEMP Tester Digital Conductivity Water Quality Water Quality Tester 0-5000ppm/0-9999US for Pool Aquarium

1PC EC TEMP Meter/ TDS TEMP Tester Digital Conductivity Water Quality Water Quality Tester 0-5000ppm/0-9999US for Pool Aquarium

$14.05 $24.65

2 sold

Categories: Tools, Measurement & Analysis Instruments

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28% off
MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

$21.48 $29.84

Categories: Tools, Measurement & Analysis Instruments

Buy Now
11% off
2018 New TDS EC Meter Temperature Tester Pen 3 In1 Function Conductivity Water Quality Measurement Tool TDS&EC Tester 0-5000ppm 2018 New TDS EC Meter Temperature Tester Pen 3 In1 Function Conductivity Water Quality Measurement Tool TDS&EC Tester 0-5000ppm

2018 New TDS EC Meter Temperature Tester Pen 3 In1 Function Conductivity Water Quality Measurement Tool TDS&EC Tester 0-5000ppm

$4.94 $5.55

1 sold

Categories: Tools, Measurement & Analysis Instruments

Buy Now
ZE610-H2 H2 Module Gas Detector H2 Module Detector Electrochemistry Gas Sensor Module H2 Sensor Gas

ZE610-H2 H2 Module Gas Detector H2 Module Detector Electrochemistry Gas Sensor Module H2 Sensor Gas

$12.86 $12.86

Categories: Tools, Measurement & Analysis Instruments

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16% off
Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm 3in1 FunctionTDS Conductivity Water Liquid Quality Tools Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm 3in1 FunctionTDS Conductivity Water Liquid Quality Tools

Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm 3in1 FunctionTDS Conductivity Water Liquid Quality Tools

$4.55 $5.42

Categories: Tools, Measurement & Analysis Instruments

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50% off
TDS Tester EC Meter Water Quality Purity Tester Conductivity Meter TDS Meter Monitor Detector 3-in-1 0-5000ppm TDS & EC TDS Tester EC Meter Water Quality Purity Tester Conductivity Meter TDS Meter Monitor Detector 3-in-1 0-5000ppm TDS & EC

TDS Tester EC Meter Water Quality Purity Tester Conductivity Meter TDS Meter Monitor Detector 3-in-1 0-5000ppm TDS & EC

$15.36 $30.72

Categories: Tools, Measurement & Analysis Instruments

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28% off
C8D SC8 C8 NDIR Infrared IR CO2 Carbon Dioxide Sensor High Precision Gas Concentration Detection Module 400-5000PPM 0-5000PPM C8D SC8 C8 NDIR Infrared IR CO2 Carbon Dioxide Sensor High Precision Gas Concentration Detection Module 400-5000PPM 0-5000PPM

C8D SC8 C8 NDIR Infrared IR CO2 Carbon Dioxide Sensor High Precision Gas Concentration Detection Module 400-5000PPM 0-5000PPM

$5.99 $8.32

8 sold

Categories: Tools, Measurement & Analysis Instruments

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0~5000ppm HT621 Carbon Monoxide Detector Sound and Light Alarm Professional High Precision CO Gas Tester LCD Backlight Display 0~5000ppm HT621 Carbon Monoxide Detector Sound and Light Alarm Professional High Precision CO Gas Tester LCD Backlight Display

0~5000ppm HT621 Carbon Monoxide Detector Sound and Light Alarm Professional High Precision CO Gas Tester LCD Backlight Display

$31.85 $31.85

Categories: Tools, Measurement & Analysis Instruments

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39% off
yieryi 3 in 1 TDS Tester Conductivity Meter Water Measurement Temperature Tool Function 0-5000ppm EC Meter Arrived 30% off yieryi 3 in 1 TDS Tester Conductivity Meter Water Measurement Temperature Tool Function 0-5000ppm EC Meter Arrived 30% off

yieryi 3 in 1 TDS Tester Conductivity Meter Water Measurement Temperature Tool Function 0-5000ppm EC Meter Arrived 30% off

$6.10 $10.00

2 sold

Categories: Tools, Measurement & Analysis Instruments

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11% off
HT621 Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge LCD Display Sound and Light Alarm 0~5000ppm HT621 Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge LCD Display Sound and Light Alarm 0~5000ppm

HT621 Carbon Monoxide Meter with High Precision CO Gas Tester Monitor Detector Gauge LCD Display Sound and Light Alarm 0~5000ppm

$25.09 $28.24

11 sold

Categories: Tools, Measurement & Analysis Instruments

Buy Now
73% off
3In1 Function Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm TDS Conductivity Water Liquid Quality Tools 3In1 Function Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm TDS Conductivity Water Liquid Quality Tools

3In1 Function Digital TDS EC Meter LCD TDS&EC Temperature Tester 0-5000ppm 9990us/cm TDS Conductivity Water Liquid Quality Tools

$3.21 $11.88

1 sold

Categories: Tools, Measurement & Analysis Instruments

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7% off
HT621 Handheld Carbon Monoxide Meter 0~5000Ppm High-Precision CO Detector with Audible & Visual Alarm LCD Display CO Gas Tester HT621 Handheld Carbon Monoxide Meter 0~5000Ppm High-Precision CO Detector with Audible & Visual Alarm LCD Display CO Gas Tester

HT621 Handheld Carbon Monoxide Meter 0~5000Ppm High-Precision CO Detector with Audible & Visual Alarm LCD Display CO Gas Tester

$31.21 $33.80

Categories: Tools, Measurement & Analysis Instruments

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59% off
10PCS/LOT TDS Tester, EC meter, conductivity meter, water measurement tool,Function 3 in 1, 0-5000ppm,High Quality 10PCS/LOT TDS Tester, EC meter, conductivity meter, water measurement tool,Function 3 in 1, 0-5000ppm,High Quality

10PCS/LOT TDS Tester, EC meter, conductivity meter, water measurement tool,Function 3 in 1, 0-5000ppm,High Quality

$24.97 $60.90

4 sold

Categories: Tools, Measurement & Analysis Instruments

Buy Now
28% off
MH-Z19 MH-Z19C MH-Z19E MH-Z19B IR Infrared CO2 Sensor Carbon Dioxide Gas Sensor Module CO2 Monitor 400-5000 0-5000ppm UART PWM MH-Z19 MH-Z19C MH-Z19E MH-Z19B IR Infrared CO2 Sensor Carbon Dioxide Gas Sensor Module CO2 Monitor 400-5000 0-5000ppm UART PWM

MH-Z19 MH-Z19C MH-Z19E MH-Z19B IR Infrared CO2 Sensor Carbon Dioxide Gas Sensor Module CO2 Monitor 400-5000 0-5000ppm UART PWM

$10.23 $14.21

26 sold

Categories: Tools, Measurement & Analysis Instruments

Buy Now
16% off
Aquarium Pool Water 0.0-14.0pH Digital PH Tester+Digital TDS EC Meter 0-5000ppm tds&0-9990us/cm Conductivity Meter With Bag Aquarium Pool Water 0.0-14.0pH Digital PH Tester+Digital TDS EC Meter 0-5000ppm tds&0-9990us/cm Conductivity Meter With Bag

Aquarium Pool Water 0.0-14.0pH Digital PH Tester+Digital TDS EC Meter 0-5000ppm tds&0-9990us/cm Conductivity Meter With Bag

$10.07 $11.99

Categories: Tools, Measurement & Analysis Instruments

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50% off
WIFI Air Quality Meter 12 In 1 PM2.5 PM10 HCHO AQI Temperature And Humidity Tester Carbon Dioxide Detector 0-5000PPM WIFI Air Quality Meter 12 In 1 PM2.5 PM10 HCHO AQI Temperature And Humidity Tester Carbon Dioxide Detector 0-5000PPM

WIFI Air Quality Meter 12 In 1 PM2.5 PM10 HCHO AQI Temperature And Humidity Tester Carbon Dioxide Detector 0-5000PPM

$137.25 $274.50

Categories: Tools, Measurement & Analysis Instruments

Buy Now
50% off
MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR compatible with S8 0053 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR compatible with S8 0053

MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR compatible with S8 0053

$149.99 $299.99

Categories: Tools, Measurement & Analysis Instruments

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18% off
High Quality 2000/5000ppm/1%/3%/65% RS485 4-20mA Carbon Dioxide Meter CO2 Sensor Transmitter 4-20ma CO2 Transducer High Quality 2000/5000ppm/1%/3%/65% RS485 4-20mA Carbon Dioxide Meter CO2 Sensor Transmitter 4-20ma CO2 Transducer

High Quality 2000/5000ppm/1%/3%/65% RS485 4-20mA Carbon Dioxide Meter CO2 Sensor Transmitter 4-20ma CO2 Transducer

$177.02 $215.88

12 sold

Categories: Tools, Measurement & Analysis Instruments

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28% off
MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

MH-Z19 MH-Z19B Infrared CO2 Sensor Module Carbon Dioxide Gas Sensor for CO2 Monitor 0-5000ppm MH Z19B NDIR

$15.18 $21.09

21 sold

Categories: Tools, Measurement & Analysis Instruments

Buy Now