Description

RST Instruments manufactures thermistor string assemblies that are environmentally hardened to provide accurate and reliable long-term measurements under demanding geotechnical conditions. The strings incorporate interchangeable, curve tracking, negative temperature coefficient (NTC) thermistors. As the thermistors are curve matched to desired temperature tolerance over selected temperature ranges, this permits the use of multiple sensors with a single readout or data logger, eliminating costly calibration procedures.

RST thermistor strings are custom manufactured to user specifications: cable length, thermistor number, accuracy, and location on the string. Resistance to the ingress of water is insured by a triple encapsulation procedure. Standard cable employed is a heavy duty, direct burial rated 22 gauge water blocked instrumentation cable. Thermistor strings with piezometers are also available and custom made to order. Contact RST Sales for complete details.

Other cable types are available to suit site-specific requirements. Readout instruments are available, ranging from hand held devices to complete data logger systems.

A bussed digital version is also available, please see RST’s Digital ThermArray brochure.

Quick Specs

High reliability, ensured by triple encapsulation.

Precision matched, interchangeable thermistors.

Pre-assembled to specific length and spacing.

Heavy duty, direct burial cable standard.

Interchangeability Tolerance of ±0.1°C.

Interchangeability Temp. Range of 0°C to +75°C.

Operating Temp. Range of -80°C to +75°C.

Stability of 0.01°C or better /100 months at 0°C.

Resistance at 25° at 2252, 3k, 5k, 10k ohms.

Applications

Used with Thermistors

Benefits

Increase Productivity

High Accuracy

High Reliability