Sigma Sport Onyx Pro HRM | 
| Brand: Sigma
List Price: $330.00
Buy New: $99.99 (On sale from $119.99)
You Save: $20.00 (17%)
New (7) from $99.99
Rating:  4 reviews
Sales Rank: 10347
Color: Black
Media: Misc.
MPN: 137351
Model: 137351
ASIN: B000R3R1D4
Availability: Usually ships in 2-3 business days
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| Editorial Reviews:
Product Description
Product Description Onyx Pro Includes memory for up to 7 training sessions, 4 pre - programmed training sessions and 2 programmable sessions Sigma Onyx Pro HRM: Black . A PROFESSIONAL WHEN IT COMES TO TRAINING . The digital coded ONXY PRO with preset and individually adaptable endurance and interval training ranges is new to the marketplace . The training zones can either be calculated in line with IAT (individual anaerobic threshold) or maximum heart rate . The detailed analysis of the training units is ideal for all professional and ambitious sportspeople . A magnification function for improved readability and a new kind of navigation for intuitive menu guidance are innovations that characterise this Heart Rate Monitor . 7 memory locations, a lap counter (50 laps with average and maximum heart rate indications), a light and a battery change compartment round off the features of this precise heart rate watch . A real professional .
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| Customer Reviews:
 Good value heart rate monitor, minor annoying features September 2, 2007
Abu Yoyo (Israel)
2 out of 2 found this review helpful
I bought this HRM because it seemed to have better features than the equivalently priced HRMs from Polar. After having used it for several weeks, I can say that I am perfectly happy with it, with the exception of some minor features that I would change or enable the users to adjust according to their preference. The overall performance is very good and only very rarely did I get a "no signal" indication, and this was possibly due to a loose fit of the strap. The watch is simple and elegantly designed and I now wear it all the time. The % heart rate indicators are excellent and enable quick evaluation of your target and actual heart rates. The bike adaptor is a good idea and very useful when cycling.
The only annoying features are:
1. The buttons are a bit bulky and it's difficult to press a button without pressing an unwanted button on the other side of the watch.
2. Every time you press a button, you need to press twice - once to turn on the backlight (unnecessary on most occasions and also consumes more battery power) and then again to operate the feature you need.
3. The chest strap is a bit bulky, but similar to the straps on the lower-priced Polar models.
Overall, I'm happy with this HRM and I think it gives good value for your money. Recommended if you're not very picky about the comfort of the "user interface".
 The perfect value. April 5, 2008
Jay (New Haven, CT)
2 out of 2 found this review helpful
This is my fourth HRM and I have used/own other popular brands and models including Polar, Oregon Scientific and Reebok. Wonder why I have four, I think once you get in to the metrics world and actually observe that smart training has major impact and you strive for the perfect equipment and of course..Just because !! :)
Here is my initial product definition requirements (Note - I summarized what my needs are before I started searching for the right product)
1. Constant heart rate display with options to quickly check for KCAL burnt, Check time, Average HRM.
2. HR Zone and ability to customize the interval and zone parameters
3. Endurance trainer and preferably have the ability to customize own routine
4. Memory to store my workout data for future reference (Ideally the watch should interact with my computer but if the price point was an indulgence, then it should at least have workout summary in memory for at least a week)
5. Chest belt can be replaced easily
6. The product should have decent website and I can actually look up information and address issues
7. MOST important - I should be able to change the batteries and avoid paying over the cost of watch for maintenance (Case in point my POLAR watch - Great equipment but hate the fact I have to send a product that I paid for in full to service center to have it replaced and pay for shipping and battery which is almost 40% of the watch cost)
8. Finally - Price. I'm a value hunter and I wanted a midpoint between features and price and budget was $100.
The value -
1. All my technical requirements were easily met and I had additional features like "Custom name" - The watch displays your name.
2. I love the multi-line display and the functions are nothing but logical. The manual with it's tiny print and multiple language can scare people, [...]
3. Price - The seller I got it from through Amazon had a decent deal for 80 bucks and you surely cannot go wrong with the price point for the features.
The technical meat -
1. The chest strap and watch synchronization is perfect every time. Compared readings to my other heart rate monitors and gym equipment and it's right on dot.
2. User profile customization is neat (Gender, Weight, height and watch calculates your ideal HR zones)
3. Endurance trainer is a real test and love the fact it keeps me motivated. The custom program allows you to set your preferences like warm up time can be increased to 10 minutes or more and like wise for workout and cool down. Device supports monitoring by time, distance and HR threshold.
4. The interval training mode is perfect for weight training.
5. If you are in to Marathons, this model supports a 42k, 21k, 11k tracking with HRM and LAPS (50)
6. This model supports IAT (individual anerobic threshold) - Now whether this method of training is effective or not is a different topic but the device can help you focus on your training based on your max heart rate.
Final conclusion -
1. Sigma Sport Onyx Pro effectively offers same and more features at about half the price of it's rivals.
2. Online research indicates the company is based in Germany and seems have good market share in europe and is knows for it's HRM devices for Cycling.
3. The watch and Chest trap construction is durable and the device actually looks clean without crazy offroading looks. If I can get at least 3 years with an investement of 2 dollars for batteries every 3-4 months, I got my returns for the investment.
Good heartrate monitor November 23, 2007
Unix Guy (Blackwood Terrace, NJ USA)
This is my first heart rate monitor. I researched quite a few, including the Polar and the Garmin GPS / heart rate monitor. For the money, I think the Sigma Onyx Pro is a good deal given the features.
I use the Sigma mainly to help with my bicycle riding workouts, which include both indoor (trainer) and outside.
PROS:
* The display includes the current heart rate and a range bar to show you where you are within the target range. This is helpful when visibility is a bit low, for example when riding your bike in the rain. I was able to see at least my approximate heart rate even while riding in the rain for over an hour with my glasses full of water.
* The countdown time for the warmup, workout, and warmdown is helpful.
* The chest strap is not problem at all. After I've had it on for 5 minutes and started riding, I don't even realize that it's there.
* The memory includes several days worth of training. The information stored in the memory includes: target heart rate; training time within the zone; percentage of time within the target range. This should be enough to help properly guide training and track progress;
CONS:
* The elapsed time for the workout (or warmup and cooldown) alternates between the actual countdown timer and the current workout phase (warmup, workout, cooldown). When riding a bicycle, this is a pain. The countdown timer alternates every 3-4 seconds. When I'm riding my bike quite often I look down to check the countdown time and I see the current workout phase, not the time. That means that I need to look down more often than I would like to see the actual countdown timer. That can be bad when riding on roads with even moderate traffic.
* The display includes the countdown timer, the heart rate range bar, the heart rate, and total time. The countdown timer display is a bit small making it difficult to see while riding. I would gladly give up the total time display to provide more space for the countdown time so it would be easier to see.
* The adapter that is provided to allow you to attach the monitor to bicycle handlebars is essentially useless. It is far to small for my bicycle (which is a typical road bike). If you simply strap the monitor to the handle bars using the wrist strap alone, it is not as tight as it should be to prevent movement while riding.
Another reviewer has indicated that the buttons are a problem, especially having to press buttons twice in some cases and holding down the buttons for 2 secs to get started. I don't find this a problem because it prevents accidental selection. Although, I can see how some people may not like this.
 Do Not Buy This Watch August 9, 2008
Joseph B. Napolitano (New York)
The functional aspect of this watch -- the software -- is good, but after about 2 weeks the bezel fell of. I just got out of the pool and the crystal is all fogged up. I use this watch very lightly -- primarily while bike riding, so it not like i beat it up.
Stay Away
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