"The CDH-37 portable conductivity meter provides excellent cost-effective performance in a field unit that measures ionized materials in solution. Housed in a rugged, high density polyethylene protective case, the CDH-37 includes a break-resistant probe with an internal thermistor for automatic temperature compensation. The unit features 5 conductivity ranges from 0-2 µmho\/cm to 0-20,000 µmho\/cm, to cover most water applications. To ensure versatility, the CDH-37 operates on 8 AA batteries and comes complete with probe and standard solutions."