Palmer Circular Chart Recorders are durable, fully mechanical units with a low maintenance design. Housed in a Pelican® brand case and available in 8 inch and 12 inch chart sizes, these recorders are lightweight and easy to carry. All Pelican® brand case circular chart recorders come with a Plexiglass window standard.
Pelican® brand case circular chart recorders are crush resistant and dust-proof with double throw latches and water tight O-ring seal for protection in harsh environments. The automatic pressure equalization valve releases built-up pressure and prevents moisture intrusion. Ideal for transporting to the job site, Pelican® brand cases feature rubber over-molded handle for comfort, open cell core with solid wall design for strength, with heavy duty deflector ribs to protect against shock and impact. Exterior stainless steel hardware and padlock protectors. Internals are all stainless steel - corrosion resistant with micro-adjustable wire linkage.
Available with up to 3 pens, all pressure elements are made of 316SS and are field replaceable. Choose from our three available Pelican® case mounting styles: portable, pipestand, or wall mount.
Low pressure elements for ranges below 30 PSI are 316SS bellows diaphragm, tubing, and fittings. Standard pressure elements for 30 to 10,000 PSI ranges are made from 316SS helical coil with stainless steel fittings and tubing, and have 1/4 inch NPT fitting. High pressure elements for ranges above 10,000 PSI are made from 316SS bourdon tube with autoclave fitting. High pressure elements are calibrated on the rise only.
Choose from a variety of recorder drives to configure your recorder. Our most popular option is the PC-11 C-Cell alkaline battery powered, intrinsically safe eleven speed motor with speeds of 60 minutes, 96 minutes, 12 hours, 24 hours, 48 hours, 7 days, 8 days, 14 days, 16 days, 31 days or 32 days. Our PC-12 C-Cell battery powered, intrinsically safe twelve speed motor offers speeds of 30 minutes, 60 minutes, 2 hours, 4 hours, 6 hours, 8 hours, 12 hours, 24 hours, 3 days, 4 days, and 7 days. Spring wound drives with standard rotation of 24 hours / 7 days are available, with other spring wound rotations available with special order. Electric chart drives are available with 7 day or 12 hour rotation.
Palmer Chart recorders use disposable fine point felt tipped pens in red, green, and blue. Black and purple pens are available. We offer standard and specialty charts to meet the needs of your application.
All Palmer Circular Chart Recorders are built to order in our Asheville, NC factory.