Register
View Cart (0 Items)
800-813-5408
Browse Close
800-813-5408
Search Store
Browse Store
Apollo Safety
Request Catalog
Mailing List
Sign up for our newsletter
Contact Us
Apollo Safety
36 Fifth Street
Fall River, MA 02721
508-673-2544

Replacement Sensors

Did you know sensors for gas monitors have a lifespan? Gas monitors are made to last for years, but old sensors can mean false readings and faulty equipment. Luckily for you, most gas monitors have field replaceable sensors making it easy to keep your devices running. Apollo Safety has replacement sensors for the most popular single and multi-gas monitors on the market. 

Prices are subject to change without notice due to ongoing tariff adjustments and market conditions. For the most accurate and up-to-date pricing, please contact us directly.

Narrow it down
1039 products found. Showing 241 - 280Page: << 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 >>
S2 Series Carbon Monoxide (CO) 0-300 ppm sensor / transmitter, explosion proof with j-box, CSA version S2 Series Carbon Monoxide (CO) 0-300 ppm sensor / transmitter, explosion proof with j-box, CSA version

SKU: 65-2336RK

Price: $860.00
In Stock
S2 Series Carbon Monoxide (CO) 0-300 ppm sensor / transmitter, non explosion proof with j-box S2 Series Carbon Monoxide (CO) 0-300 ppm sensor / transmitter, non explosion proof with j-box

SKU: 65-2335RK

Price: $730.00
In Stock
S2 Series Chlorine (Cl2) 0 - 10 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Chlorine (Cl2) 0 - 10 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-CL2-10

Price: $1,205.00
In Stock
S2 Series Chlorine (Cl2) 0 - 3 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Chlorine (Cl2) 0 - 3 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-CL2-3

Price: $1,205.00
In Stock
S2 Series Chlorine (Cl2) 0 - 5 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Chlorine (Cl2) 0 - 5 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-CL2-5

Price: $1,205.00
In Stock
S2 Series Chlorine Dioxide (ClO2) 0 - 1 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Chlorine Dioxide (ClO2) 0 - 1 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-CLO2-1

Price: $1,205.00
In Stock
S2 Series Chlorine Dioxide (ClO2) 0 - 3 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Chlorine Dioxide (ClO2) 0 - 3 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-CLO2-3

Price: $1,205.00
In Stock
S2 Series Chlorine Dioxide (ClO2) 0 - 5 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Chlorine Dioxide (ClO2) 0 - 5 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-CLO2-5

Price: $1,205.00
In Stock
S2 Series Hydrogen (H2) specific 0 - 100 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL S2 Series Hydrogen (H2) specific 0 - 100 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL

SKU: 65-2445-100

Price: $860.00
In Stock
S2 Series Hydrogen (H2) specific 0 - 100% LEL sensor/transmitter with explosion proof j-box, CSA S2 Series Hydrogen (H2) specific 0 - 100% LEL sensor/transmitter with explosion proof j-box, CSA

SKU: 65-2451RK-05

Price: $880.00
In Stock
S2 Series Hydrogen (H2) specific 0 - 100% LEL sensor/transmitter with explosion proof j-box, UL S2 Series Hydrogen (H2) specific 0 - 100% LEL sensor/transmitter with explosion proof j-box, UL

SKU: 65-2451RK

Price: $830.00
In Stock
S2 Series Hydrogen (H2) specific 0 - 1000 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL S2 Series Hydrogen (H2) specific 0 - 1000 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL

SKU: 65-2445-1000

Price: $860.00
In Stock
S2 Series Hydrogen (H2) specific 0 - 2000 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL S2 Series Hydrogen (H2) specific 0 - 2000 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL

SKU: 65-2445-2000

Price: $860.00
In Stock
S2 Series Hydrogen (H2) specific 0 - 500 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL S2 Series Hydrogen (H2) specific 0 - 500 ppm linearized, dual-pot MOS sensor/transmitter with explosion proof j-box, UL

SKU: 65-2445-500

Price: $860.00
In Stock
S2 Series Hydrogen (H2) specific 0-100% LEL (catalytic) sensor/transmitter with j-box, remote detector and calibration adapter/splash guard S2 Series Hydrogen (H2) specific 0-100% LEL (catalytic) sensor/transmitter with j-box, remote detector and calibration adapter/splash guard

SKU: 65-2451RK-04

Price: $985.00
In Stock
S2 Series Hydrogen Chloride (HCL) 0 - 20 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Hydrogen Chloride (HCL) 0 - 20 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-HCL

Price: $1,205.00
In Stock
S2 Series Hydrogen Cyanide (HCN) 0 - 15 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Hydrogen Cyanide (HCN) 0 - 15 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-HCN-15

Price: $1,205.00
In Stock
S2 Series Hydrogen Cyanide (HCN) 0-15 ppm sensor / transmitter, non explosion proof with j-box S2 Series Hydrogen Cyanide (HCN) 0-15 ppm sensor / transmitter, non explosion proof with j-box

SKU: 65-2340RK-HCN

Price: $880.00
In Stock
S2 Series Hydrogen Cyanide (HCN) sensor / transmitter, explosion proof with j-box, CSA version S2 Series Hydrogen Cyanide (HCN) sensor / transmitter, explosion proof with j-box, CSA version

SKU: 65-2333

Price: $995.00
In Stock
S2 Series Hydrogen Sulfide (H2S) 0-100 ppm sensor / transmitter, explosion proof with j-box, CSA version S2 Series Hydrogen Sulfide (H2S) 0-100 ppm sensor / transmitter, explosion proof with j-box, CSA version

SKU: 65-2331RK

Price: $860.00
In Stock
S2 Series Hydrogen Sulfide (H2S) 0-100 ppm sensor / transmitter, non explosion proof with j-box S2 Series Hydrogen Sulfide (H2S) 0-100 ppm sensor / transmitter, non explosion proof with j-box

SKU: 65-2330RK

Price: $730.00
In Stock
S2 Series IR Carbon Dioxide (CO2) 0-100% sensor / transmitter, explosion proof with j-box, UL version S2 Series IR Carbon Dioxide (CO2) 0-100% sensor / transmitter, explosion proof with j-box, UL version

SKU: 65-2396RK-10

Price: $1,095.00
In Stock
S2 Series IR Carbon Dioxide (CO2) 0-5,000 ppm sensor / transmitter, explosion proof with j-box, UL version S2 Series IR Carbon Dioxide (CO2) 0-5,000 ppm sensor / transmitter, explosion proof with j-box, UL version

SKU: 65-2396RK-02

Price: $1,095.00
In Stock
S2 Series IR Carbon Dioxide (CO2) 0-5% sensor / transmitter, explosion proof with j-box, UL version S2 Series IR Carbon Dioxide (CO2) 0-5% sensor / transmitter, explosion proof with j-box, UL version

SKU: 65-2396RK-03

Price: $1,095.00
In Stock
S2 Series IR Carbon Dioxide (CO2) 0-50% sensor / transmitter, explosion proof with j-box, UL version S2 Series IR Carbon Dioxide (CO2) 0-50% sensor / transmitter, explosion proof with j-box, UL version

SKU: 65-2396RK-05

Price: $1,095.00
In Stock
S2 Series IR Methane (CH4) 0-100% LEL, sensor / transmitter, with j-box, remote detector and calibration adapter/splash guard S2 Series IR Methane (CH4) 0-100% LEL, sensor / transmitter, with j-box, remote detector and calibration adapter/splash guard

SKU: 65-2394RK-CH4-4

Price: $1,250.00
In Stock
S2 Series IR, Hydrocarbon (HC) 0-100% LEL sensor / transmitter with explosion proof j-box S2 Series IR, Hydrocarbon (HC) 0-100% LEL sensor / transmitter with explosion proof j-box

SKU: 65-2394RK-HC

Price: $1,095.00
In Stock
S2 Series IR, Methane (CH4) 0-100% LEL sensor / transmitter with explosion proof j-box S2 Series IR, Methane (CH4) 0-100% LEL sensor / transmitter with explosion proof j-box

SKU: 65-2394RK-CH4

Price: $1,095.00
In Stock
S2 Series IR, Methane (CH4) 0-100% volume sensor / transmitter with explosion proof j-box S2 Series IR, Methane (CH4) 0-100% volume sensor / transmitter with explosion proof j-box

SKU: 65-2395RK-CH4

Price: $1,095.00
In Stock
S2 Series LEL 0-100% sensor (catalytic) / transmitter with explosion proof j-box, CSA version, (specify calibration) S2 Series LEL 0-100% sensor (catalytic) / transmitter with explosion proof j-box, CSA version, (specify calibration)

SKU: 65-2405RK-05

Price: $700.00
In Stock
S2 Series LEL 0-100% sensor (catalytic) / transmitter with explosion proof j-box, UL version, (specify calibration) S2 Series LEL 0-100% sensor (catalytic) / transmitter with explosion proof j-box, UL version, (specify calibration)

SKU: 65-2405RK

Price: $675.00
In Stock
S2 Series LEL 0-100% sensor (catalytic) / transmitter with j-box, (specify calibration), remote detector and calibration adapter/splash guard S2 Series LEL 0-100% sensor (catalytic) / transmitter with j-box, (specify calibration), remote detector and calibration adapter/splash guard

SKU: 65-2405RK-04

Price: $830.00
In Stock
S2 Series Methane (CH4) 0-100% vol sensor (TC) / transmitter, explosion proof with j-box S2 Series Methane (CH4) 0-100% vol sensor (TC) / transmitter, explosion proof with j-box

SKU: 65-2463RK

Price: $1,260.00
In Stock
S2 Series MOS, Hexane (C6H14) 0-500 ppm linearized sensor/transmitter, dual pot, with explosion proof j-box, UL S2 Series MOS, Hexane (C6H14) 0-500 ppm linearized sensor/transmitter, dual pot, with explosion proof j-box, UL

SKU: 65-2446-500

Price: $860.00
In Stock
S2 Series Nitrix Oxide (NO) 0 - 100 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Nitrix Oxide (NO) 0 - 100 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-NO

Price: $1,205.00
In Stock
S2 Series Nitrogen Dioxide (NO2) 0 - 15 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box S2 Series Nitrogen Dioxide (NO2) 0 - 15 ppm, CT-7 style sensor / transmitter, non explosion proof with j-box

SKU: 65-2341-NO2

Price: $1,205.00
In Stock
S2 Series Oxygen (O2) 0-100% sensor / transmitter (partial pressure), non explosion proof with j-box S2 Series Oxygen (O2) 0-100% sensor / transmitter (partial pressure), non explosion proof with j-box

SKU: 65-2320RK-100

Price: $595.00
In Stock
S2 Series Oxygen (O2) 0-25% sensor / transmitter (partial pressure), non explosion proof with j-box S2 Series Oxygen (O2) 0-25% sensor / transmitter (partial pressure), non explosion proof with j-box

SKU: 65-2320RK

Price: $595.00
In Stock
S2 Series Oxygen (O2) 0-25% sensor / transmitter, (capillary type) non explosion proof with j-box S2 Series Oxygen (O2) 0-25% sensor / transmitter, (capillary type) non explosion proof with j-box

SKU: 65-2321RK

Price: $595.00
In Stock
S2 Series Phosphine (PH3) 0-1 ppm sensor / transmitter, non explosion proof with j-box S2 Series Phosphine (PH3) 0-1 ppm sensor / transmitter, non explosion proof with j-box

SKU: 65-2340RK-PH3

Price: $880.00
In Stock

1039 products found. Showing 241 - 280Page: << 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 >>
© 2025 Copyright Apollo Safety. All Rights Reserved.
Apollo Safety
36 Fifth Street
Fall River, MA 02721
508-673-2544
sales@apollosafety.com

Veteran Owned Small Business