Login
Bluelab® Guardian Monitor
Bluelab® Guardian Monitor
Bluelab® Guardian Monitor
 Next

Bluelab® Guardian Monitor

Marsoni M251S
Sale price$205.50
Pay 4 payments of $51.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Bluelab® Guardian MonitorAdjustable brightness display. Large easy to read, plant safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and temperature. Silent alarm for both high and low settings. Settings retained when power lost (non volatile memory). Temperature compensation. An international power supply. Water resistant design. 2 year Bluelab Guarantee (6 months on
Easy Shipping

Quick Dispatch:

Your Bluelab® Guardian Monitor orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Bluelab® Guardian Monitor ships.

Need Help?
Questions about Bluelab® Guardian Monitor, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Bluelab® Guardian Monitor in your area.

Get Shipping Estimates

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
4.4 ★★★★★
Based on 1187 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Abbe
Draper, US
★★★★★ 5
Skirt pants!!!
Size: Medium/29" Inseam, Color: California Blue
I love these pants so much. They are super flowy and extremely comfortable. User note: when going up stairs, hold up the pants hem like a skirt in order to not step on the hem and trip!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
A
Verified Purchase
Anda Florea
Grantham, US
★★★★★ 5
The fit is great
Size: X-Small/29" Inseam, Color: Deep Indigo
They are very nice! Would recommend
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
S
Verified Purchase
Sondra Cole
Lexington, US
★★★★★ 5
Great High Quality Pants
Size: Large, Color: Black
Love, love, love these pants. Very high quality, comfortable and versital. Definitely a staple .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
A
Verified Purchase
Anita
New York, US
★★★★★ 5
Comfortable
Size: Large, Color: Irie
Love love them. Great fit and very comfortable. Material sturdy and can wear all seasons
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 9, 2025
R
Verified Purchase
Ryan Borden
Alexandria, US
★★★★★ 4
Fp
Size: Small, Color: No Problem
Cute but run large , ended up getting a size smaller
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026

recommand products

14kt White Gold 5/8 Cttw Diamond Ana M Fashion Cnc Eternity Wedding Engagement Anniversary Band, Women Size: 5-9
14kt White Gold 5/8 Cttw Diamond Ana M Fashion Cnc Eternity Wedding Engagement Anniversary Band, Women Size: 5-9
543.22
 Chrome Socket, 1-1/8
Chrome Socket, 1-1/8", 1/2" Drive, 12 Points
20.54
 14kt White Gold 5/8 Cttw Diamond Ana M Fashion Octagon Wedding Engagement Anniversary Band, Women Size: 5-9
14kt White Gold 5/8 Cttw Diamond Ana M Fashion Octagon Wedding Engagement Anniversary Band, Women Size: 5-9
717.55
 14kt White Gold 5/8 Cttw Diamond and 1/3 Cttw Pear Fashion Pear Wedding Engagement Anniversary Ladies Ring, Women Size: 5-9
14kt White Gold 5/8 Cttw Diamond and 1/3 Cttw Pear Fashion Pear Wedding Engagement Anniversary Ladies Ring, Women Size: 5-9
647.82
 Quick-Align® Individual Number and Letter Labels, 7, 4
Quick-Align® Individual Number and Letter Labels, 7, 4" H, Black
31.74