Home > Deep Cycle Batteries & Accessories > Battery Accessories & Maintenance > Freas HD99M Precision Hydrometer

Welcome to the Northern Arizona Wind & Sun Solar Electric Store

Northern Arizona Wind & Sun is one of the pioneer solar power companies, and has been in the solar electric business since 1979. We stock a complete range of solar panels, inverters, deep cycle batteries, and hundreds of other DC power and solar power related products.

** 2009 is our 30th anniversary - 1979 to 2009. ** -- There is no Arizona state sales tax on solar panels or solar electric systems (local taxes may still apply). -- Think those "other" solar panels are cheaper? Check what they charge for shipping before you decide for sure -- Shipping Costs: To see a shipping quote, put the items in your cart, go to first Checkout page, and enter your ZIP code.

- email us here for: "where's my stuff", product, system and shipping quotes, availability, and solar product questions.

Freas HD99M Precision Hydrometer

Freas HD99M Precision Hydrometer
Freas HD99M Precision Hydrometer
Item# HD99M
Regular (MSRP) price: $65.00
Our Discounted Price: $35.00
Availability: Usually ships the next business day.

Freas HD99M Precision Hydrometer for 1.100 to 1.300 specific gravity readings on flooded deep cycle Lead-Acid batteries.

State of Charge and Charging. This table is for the Surrette deep cycle batteries, but nearly all deep cycle batteries will be very close to these values.

The truest measure of a battery's state of charge is the SPECIFIC GRAVITY of the battery acid. The following shows the approximate state of charge at various specific gravities at 77ºF / 25ºC.

Charged Specific Gravity
100% 1.265-1.275
75% 1.225-1.235
50% 1.190-1.200
25% 1.155-1.165
0% 1.120-1.130

Solution Graphics

We accept all major credit cards, PayPal and eCheck (vial PayPal). We ship to all states and Canadian provinces, and to about 40 other countries.


Our office hours are from 8 AM to 4 PM, Mountain Standard Time, Mon-Fri. We are closed for major holidays. If you are in the Flagstaff area, please stop by our store and visit - map link: Get Map to Store
Sign up for our Newsletter
Email:


For Email Marketing you can trust