Polar G1 GPS Speed and Distance Sensor
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List Price: $139.95
Our Price: $139.95
Availability: N/A
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Manufacturer: Polar
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Click on the Buy From Amazon.com link to know Amazon.com's best price & availability.
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Binding: Misc.
Brand: Polar
EAN: 0725882475608
Feature: GPS sensor for calculating speed and distance during low-speed sports
Label: Polar
Manufacturer: Polar
Model: 91033464
Publisher: Polar
Release Date: 2008-06-01
Studio: Polar
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Features
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GPS sensor for calculating speed and distance during low-speed sports
Compatible with Polar RS200, RS400, S625X, and S725X training computers
Ideal for running, kayaking, cross-country skiing, and inline skating
Battery life of up to 10 hours (regular mode) or 15 hours (low-power mode)
Speed range of 0 to 18.3 miles per hour; weighs only 2.82 ounces
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Editorial Reviews for Polar G1 GPS Speed and Distance Sensor
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The Polar G1 GPS sensor provides speed/pace and distance measurement for outdoor sports, for example running or cycling. The G1 speed range is 0-30km/h / 0-18.3 m/h.
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Consumer reviews:
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Customer Rating:  
Summary: Polar G1 GPS - Review
Comment: I have the Polar S625X and use it all the time for running, biking and swimming. I use the S1 foot pod for running and have had very good luck with it, even without calibration. I also use a Garmin Forerunner 205 while running for more accurate distance measurement. I was very excited when Polar released the G1 gps that would work with the S625X. I like the Garmin but get tired of keeping up with two watches, plus the running log software with Polar is far better than Garmin's.
I waited quite some time before buying, hoping I'd find some product reviews on-line. I didn't find many so decided to just try it myself. After getting mixed information from a polar rep (from my local bike shop) and the customer service at Polar, I bought it from Amazon.com.
Unfortunately, I feel now like I wasted $140. I first tried it while running and although the distance was not so bad, the pace information was useless. At one point it was stuck at 10:40 min/mile while I was running closer to 8 min/mile. Even slowing down and speeding up wouldn't get it to budge. I tried other times running and the error in distance got even worse.
Then I rode my moutain bike while others were running (so I was going pretty slow). It measured short and then stopped altogether.
I will try get it to work better, but I'm not so confident. If you use the S1 foot pod, I would stick with that as the pace info on the G1 is worthless (most gps' aren't very good for that anyway while running) and I can't seem to get the distance to work very well. If you want really accurate distance, I would suggest the Garmin products. Otherwise, just use your S1.
Customer Rating:
Summary: A Welcome Addition to the Polar S & RS Series Watches
Comment: I'm a Polar S725x Heart Rate Monitor user and I've been using the Polar S1 Foot Pod diligently for my runs and walks. I like the light weight feel of the Footpod. After having seen the buzz here about the G1 GPS, I had to give it a shot. Prior to using the s725x, I was actually a Timex Bodylink user. The Bodylink system is a heart rate monitor, speed, distance, and altitude system. I switched over to Polar because heart rate data is more important to me than anything else. Here's my review of the G1:
What you get: G1 GPS Unit, Armband, AA battery, and a nice little storage pouch.
First off, the weight initially feels a little heavy. Compared to the Timex GPS unit, the G1 is just a tad heavier. After having it strapped to my upper arm for a few minutes though, I forgot that it was there. So it's just a matter of getting used to it being there.
Set-up: When I first powered up the unit, the G1 took about three minutes to find a signal.
Now on to accuracy...
TEST #1: I decided to head out to Fort Funston here in San Francisco and take a walk along a path where I know the precise distance. Not only that, but I decided to bring along my Magellan Explorist 210 GPS. This GPS uses the highly accurate WAAS system. The roundtrip distance for the walk is 1.11 miles. There isn't that much tree cover, and when I did pass under a tree canopy, it was only for a distance of 100 feet or so. I didn't experience any loss in signal. At 0.7 miles on my GPS, the Polar G1 started to deviate a little bit. The G1 was reading 0.75. The deviation of 0.05 miles remained at the One Mile mark. But at the end of the walk, my GPS read 1.1 miles while the Polar G1 registered 1.2 miles. Of course, this is without calibration. (I've done this path before to test the S1 Footpod and found the deviation to only be 0.025 miles, so out of the box the S1 was more accurate without calibration.)
One thing I did notice about the G1 is that it seems to sample speed at a rate of about 3 seconds or so. Sometimes it was bang-on with the speed on my GPS, and sometimes it was catching up to it.
TEST #2: Now with the Running Feature calibrated for the deviation, I decided to walk the same path again. The GPS was powered off, then powered on again. It took about 45 seconds to find a signal. This time the measurement came out to just shy of 1.1 miles, so it's pretty close. With a little more calibration, it should be okay.
Comparisons to the Timex Bodylink: I've never used a Garmin HRM before, so I can't comment on those, but in comparing this G1 to the Timex GPS sensor, the Timex wins hands down. With the Timex, you get speed, distance, elevation, and logging features. Also, the battery lasts 20+ hours. I figured Polar could have done some forward-thinking with this unit and added some of those features. Perhaps they will when the new rs800cx comes out, or with the new FT series watches. So this is why I only give it 4/5 stars, because it doesn't have as many features as the Timex GPS.
Final Thoughts: I bought the Polar s725x because Polar is the absolute best when it comes to EKG accurate heart rate monitors. For me, my heart and its health is more important than anything else. Every other perk of the technology is just an added bonus. Sure, I do like to log distance and mileage, but when it comes to miles, I'm more interested in 10ths of a mile than anything more accurate than that.
I plan to alternate using the G1 and my S1 Footpod, depending on where I decide to walk or run. I'll use the G1 when I know I'll be in an area with a lot of open space, and the S1 when I know I'll be in an area with a lot of tree-cover.
One more thing about the G1. Now that it's out there, the Polar s625x and the s725x have become true multisport computers. I can now do some crosstraining, like kayaking and inline skating, and have a multitude of data that I can now analyze. For that alone, I think it's worth it.
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