Profile: Rickly Hydrological Co., Inc. manufactures hydrological instrumentation equipment. Our product line includes stream gaging instuments, surveying equipment, meteorological instruments and stage measurement. Our stream gaging system is used for measuring the amount of water flowing in an open channel and can range from a trickle in a ditch to a flood. Our surveying equipment includes GPS systems, stereoscopes, digitizers and altimeters. Our sediment measurement involves sampling the water-sediment mixture to determine the mean suspended sediment concentration, particle size distribution, specific gravity and temperature of the water sediment mixture. Our bed material samplers are designed to collect samples from the bed of a stream, or from lake or reservoir deposits.