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ISC Professional Hand Ascender
The RP240 Ultrasafe Hand Ascender from ISC is a professional ascender suitable for tree care operations. It is heavier because the ultrathin frame on most ascenders has been replaced by a thicker and more solid frame. This makes movement around limbs and branches safer than standard ascenders as there are no sharp angles to create issues when the ascent line is not running perfectly vertically through the ascender.
Height: 8 1/2"
Thickness: 1 1/6"
Weight: 12.7 oz
Rope diameter range: 9mm - 13mm
Body material: Aluminium
In the past 10 years, SRT access for tree work has become increasingly utilized as a method for efficient ascent for professional arborists worldwide. Arborists have borrowed heavily from other rope access disciplines for both applicable SRT techniques and requisite equipment for this function. While much of the equipment utilized for SRT access can be modified to fit the needs of professional arborists, it is clear that the need for arborists to “work laterally” off of their SRT systems and the inherent three dimensional work environment of tree work brings about the need for arbor-centric SRT equipment for increased safety.
Many of the ascenders being used by arborists have come from the recreational sport climbing discipline where weight is considered one of the most important features. Ascenders are used mainly to quickly ascend fixed lines on longer routes and therefore lateral movement is minimal. The attachment points for these ascenders are generally meant for carabiners as the slimmer design can greatly reduce overall weight. As most SRT access techniques require the use of 2 ascenders, the need for any single ascender to be able to hold significantly more than the forces that a climber can generate is often moot.
In Arboriculture, climbers need the ability to work in 3 dimensions with their SRT equipment and often climbers will be in a position where falling or flaking debris can work its way into the equipment. Movement around branches often requires lateral movement as well as often putting SRT equipment in direct contact with obstacles which can affect overall ascender performance. Due to the inherent inconsistency of the work environment for arborists the ability to perform self-rescue or aerial rescue operations is paramount when choosing gear. Climbers can often be in a position where they must place full weight and force on any given piece of equipment or even potentially use a single piece of equipment for multiple climbers.
The ISC RP240 and RP230 Ultrasafe Hand Ascenders are uniquely designed to fit the needs of professional Arborists as they utilize SRT techniques for ascent and work positioning. When I first saw these ascenders I was not immediately impressed as I was viewing them from a rock climbing perspective and not in terms of arboriculture. The first noticeable difference with The RP240 is that it is considerably heavier than most readily available hand ascenders. This weight difference is due to the fact that the ultrathin frame on most ascenders has been replaced by a much thicker and more solid frame. The attachment points on the RP240 are both carabiner friendly AND webbing or cordage friendly. The thicker frame on the RP240 makes movement around limbs and branches considerably nicer than standard ascenders as there are no sharp angles to create issues when the ascent line is not running perfectly vertically through the Ascender.
Another issue for arborists as they work a tree is that branches can often hit the cam release lever which can allow a standard ascender to rotate off the line very easily. The ISC RP240 has a safety pin which inhibits the cam release lever from opening accidentally, thereby greatly increasing the overall safety of the ascender during use for arboriculture. The top attachment points on the RP240 allows for easy and safe back up in situations where 1 single ascender is being used for ascent or work positioning.
Perhaps the greatest attribute of the ISC RP240 is the fact that the ascender is designed to hold the weight and forces of TWO climbers in cases where an Aerial Rescue is required and the gear options are limited. In my view, this feature alone makes using the RP240 for arboricultural purposes a much smarter move than using any other ascender.
As professional Arborists continue to adopt SRT systems into their everyday work practices it is extremely important to utilize equipment that is designed for the particular dangers that arise from this type of work. The ISC RP240 Ultrasafe Hand Ascenders are uniquely designed to be the safest and most versatile Ascenders for use in the Arboricultural industry.
average customer rating based on 5 reviewsgreat great great - 03/27/2014
Reviewer: Josh Abel
I have waited two years to review this because I have no other ascender to judge it against. I have used this on sterling htp 11mm and it has functioned flawlessly. Never once has a stick, stem, sap, or shavings stopped this from working like a champ. I would buy another one today if need be. You ask the guys here they would tell you, My living room is full of treestuff boxes. Keep up the honest work and great service y'all. Solid - 01/04/2014
I just received the isc ascender and my first impression was how light it was. The description makes it sound to be very heavy which it may be a bit more compared to others but I'd consider it a light piece of gear. It seems to be solid in construction and the teeth are cone shaped that stick out from the cam vs sharp downward teeth on the petzl.
A large hole and small hole on the bottom both fit carabiners easily.
The thumb latch is fairly easy to operate and low profile. The safety pin seems to pop in and out fairly easily but I do question how long the wire will last rubbing in the connection hole. It works as it should by allowing you to pull the cam back but stops it from opening completely and coming off the rope.
Seems to be a solid product and I will post back after more use. Arborist - 08/22/2013
Reviewer: Isaac Brocker
I bought this ascender primarily because of the thicker frame and the locking pin. I like gear to be as "stupid proof" as possible, and this ascender has fit the bill. I have used the device for about a year now and found it quite smooth and secure. Attachment of backup systems at the top is somewhat limited (hole size) but entirely doable. If I could change one thing, I would have a smooth handle as opposed to having individual finger grooves. These grooves are too small for thicker winter gloves and have reduced grip for me on some wet winter days, here in the northwest. This has not been so large a problem though that I would not recommend the ascender. Best handled ascender on the market - 08/08/2012
Reviewer: Aaron Johns
The large finger grips make this tool easy to hang onto, one handed or 2. The lock pin adds a bit of security, but this unit is built so well it is almost overkill!!! If you are looking for an ascender that will last a lifetime, look no further :-) Superior Ascender - 04/15/2012
Reviewer: Rick Denbeau
ISC has excelled in areas concerning ascender construction and use. This ascender's frame is thicker than any other handled ascender providing two benefits. One, the attachment holes on the bottom provide more surface area creating a better interface to attach a tether directly to the handle, eliminating the need for a connecting link. Up top, the thicker frame provides better protection for the cam from interfering debris during ascent. The cam mechanism itself is built solid and holds secure during ascents through thick-branched canopies. A spring pin locks the cam in place and is easy to use with thicker gloves. A form fit plastic hand grip is molded to provide a solid grip with gloved hands as well. One downside to this ascender is the top attachment hole only allows an HMS style carabiner which may dictate the type or style of back up to be used.