SKU: 74407773244

O4 Series - Single Gas Personal Monitors

Sale price$94.50 Regular price$105.00
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Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

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Description

O4 Series - Single Gas Personal MonitorsO4 Series Single Gas Personal Monitors Features Continuously operate for over one year (H2S & CO) Toxic gases include: NH3, Cl2, HCN, NO2, PH3 & SO2 CO with H2 elimination CO & O2 Dual Sensor Field serviceable Pocket size 2. 1(W) x 2. 6(H) x 0. 9(D), 2. 8 ounces Impact, dust, and water resistant (IP 67) Replaceable rubber boot Alligator clip with 360 rotation Audible visual vibration alarms Automatic backlight Intrinsically safe, ATEX and C US

O4 Series - Single Gas Personal Monitors

Features

Continuously operate for over one year (H2S & CO)
Toxic gases include: NH3, Cl2, HCN, NO2, PH3 & SO2
• CO with H2 elimination
• CO & O2 Dual Sensor
• Field serviceable
• Pocket size 2.1”(W) x 2.6”(H) x 0.9”(D), 2.8 ounces
• Impact, dust, and water resistant (IP-67)
• Replaceable rubber boot
• Alligator clip with 360° rotation
• Audible / visual / vibration alarms
• Automatic backlight
• Intrinsically safe, ATEX and C / US approvals
• 3 Year warranty*

The 04 Series single gas monitor is designed to operate for many years with field replaceable sensors and filters.

The 04 Series can be operated continuously for up to 9,000 hours on (2) AAA size alkaline batteries (depending on model).

The 04 Series has 3 preset alarms that are user adjustable. Each version is also equipped with visual, audible, and vibration alarms as standard.

The replacement sensors are inexpensive, easily field replaceable, and are interchangeable with other popular RKI instruments like the GX-3R, GX-3R Pro, and GasWatch 3. Sensors have a life expectancy of over 3 years and are backed by a 3 year warranty.*


Each 04 Series monitor is impact, dust, and water resistant with an IP-67 ingress protection rating. 04 Series instruments are safe for use in hazardous locations, classified as intrinsicallysafe ATEX/IECEx and by QPS to U.S. and Canadian standards for Class I, Division 1, Groups A, B, C, and D atmospheres. For additional information please visit the manufacturer web site at www.rkiinstruments.com.
* 3 year warranty on material and workmanship including sensors
(1 year warranty for Oxygen, Ammonia and Chlorine sensors)

OX-04 (replaces OX-03 SKU 72-0010)

Features

  • Continuously operate for over one year (H2S & CO)
  • Toxic gases include: NH3, Cl2, HCN, NO2, PH3 & SO2
  • CO with H2 elimination
  • CO & O2 Dual Sensor
  • Field serviceable
  • Pocket size 2.1”(W) x 2.6”(H) x 0.9”(D), 2.8 ounces
  • Impact, dust, and water resistant (IP-67)
  • Replaceable rubber boot
  • Alligator clip with 360° rotation
  • Audible / visual / vibration alarms
  • Automatic backlight
  • Intrinsically safe, ATEX and C / US approvals
  • 3 Year warranty*
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 74407773244

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4.7 ★★★★★
Based on 25 reviews
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Verified Purchase
RobbieGA
Lake Worth, US
★★★★★ 5
Grinder Set of 3
I really like these I use one for rainbow peppercorns and one for black peppercorns. The third one I am using for some coarse pink salt I accidently purchased instead of fine, once the coarse salt is used up, I plan to use it for white peppercorns. They work great, look good and are the perfect size for everyday use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026
V
Verified Purchase
Valerri H
Louisville, US
★★★★★ 5
Great product
Love that theyre adjustable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
M
Verified Purchase
Michael Ilgenfritz
Natrona Heights, US
★★★★★ 3
Poor Quality
I wouldn't gift these... they seem to start having grinding issues after a few days of use. It feels like the grinding piece is binding / going to break when turning the top. Would not purchase again, and look for more durable item.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2023
C
Verified Purchase
Connie Heath
San Leandro, US
★★★★★ 4
Lacking spices
They look just like pictures but it said they were pre- filled in the description and they arrived empty!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
B
Verified Purchase
Brewdad
Alexandria, US
★★★★★ 5
Good grinders
These are great for the price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025

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