Home
Products
Pots & Mediums
Soil & Soiless
Coco
Clay (Hydroton)
Jiffy & Rapid Rooter
Rockwool
Perlite & Vermiculite
Plastic Pots
Specialty Pots
Fabric Pots
Cloning & Germinating
Heating Mats & Thermostats
Rooting Gels & Powders
Humidity Domes & Trays
Tools
Gardening Accessories
Other
Bamboo Stakes & Netting
Sprayers
Syringes & Measuring Cups
Nutrients
Advanced Nutrients
Green Planet
Gaia Green
FoxFarm
Grotek
Dutch Nutrients
General Hydroponics
General Organics
Nutri Plus
NPK Industries
Atami
Optic Foliar
Other
Lighting
HID
CMH
HPS & MH
Ballasts
Reflectors & Sockets
Accessories
CFL
LED
Accessories
Mars Hydro
Kind LED
California Lightworks
SunBlaster
Reflective Material
Climate Control
Accessories
Ducting & Clamps
Dampers, Reducers & Flanges
CO2
Controllers & Timers
Controllers
Timers
Fans
Inline Fans
Pedestal & Wall Fans
Humidity Control
Thermometers & Hygrometers
Humidity Packs
Odour Control
Filters
Scent Gels
Tents
Mammoth
Secret Jardin
Pure Tent
Accessories
PH/PPM/Conductivity
Calibration & Storage Solutions
Equipment
pH Adjusters
Hydroponics & Irrigation
Attachments
Buckets & Inserts
Mediums
Pumps & Air Stones
Reservoirs & Flood Tables
Tubing & Hosing
Pest & Fungus Control
Pest Control
Fungus Control
Harvesting & More
Extracting
Drying
Trimming
Loupes & Microscopes
Humidity Packs
Kits
Nutrients
Tents
More Kits
Gift Card
Services
Blog
FAQS
About Us
Skip to content
Submit
Close search
HGO
Home
Catalog
About Us
FAQs
Blog
Cultivation 101
Submit
Search
Log in
Cart
Home
Catalog
About Us
FAQs
Blog
Cultivation 101
Bluelab - PPM Pen
Regular price
Sold out
Sale price
$105.99
Sale
Default Title - Sold out
Sold out
Measures Conductivity and Temperature
Backlit LCD display
Calibration optional
Fully waterproof
Automatic Temperature Compensation
Share
Share on Facebook
Pin it
Pin on Pinterest
choosing a selection results in a full page refresh
