INFWIN DigiTS-Digital Temperature String

The INFWIN DigiTS is a digital temperature string: an arrangement of individually-addressed temperature sensor nodes mounted in a single rugged, reinforced cable, with SDI-12 or RS485/Modbus-RTU output. Each DigiTS is manufactured to the customer's specific node count and spacing. Power supply, output interface, connector type, leading cable length, and the full node layout (address and depth for every node) are all specified via ordering code - the configuration below (DigiTS-AAB002[0]{1/0}{2/100}{3/130}) is a 3-node string with RS485/Modbus-RTU output, 9–28V DC supply, a cold-pressed terminal connector, and a 2 m leading cable. Each temperature node is individually addressed and referenced to its own depth, so a single string can profile temperature at multiple points along its length - down a soil pit, through a lake or ocean column, or along a permafrost bore. Reverse power protection and built-in TVS/ESD protection are included. Key Features Multi-point profiling: Up to 36 individually-addressed temperature nodes in a single string Depth-referenced nodes: Each node reports its distance from the end node, so readings map directly to physical depth Accurate and stable measurements: High-resolution temperature sensing at every node Digital output: SDI-12 (V1.3) for universal datalogger compatibility and low-power use, or RS485/Modbus-RTU for long cable runs, both with built-in surge protection Configurable measurement timing: Measure on data read, or automatically at a periodic interval Fast warm-up: Under 10 seconds Robust construction: Kevlar-reinforced 20AWG cable, under 7.5 mm diameter, with nylon sensor node housings Long reach: Up to 152 m (500 ft) total cable length Low power consumption Reverse power protection: Built-in TVS/ESD protection Connector options: Cold-pressed terminal or stripped & tinned lead wires Configuration utility: SensorOneSet software (RS485) or SensorOneSetSDI12 software (SDI-12) included for sensor configuration Applications Permafrost profile temperature Ocean and lake profile temperature Temperature field measurement Scientific research Important Notes Each string is built to order - the ordering code must specify a node address and depth-from-end for every node, so no two configurations look alike. Minimum spacing between adjacent nodes is 15 cm (6 in). Maximum of 36 nodes per string; maximum total cable length is 152 m (500 ft). Power and data-reading current draw scale with the number of nodes - see the specification table for the per-node current formulas. Long-term operating range is −40°C to +85°C, even though the sensing element itself is rated to −55°C. All nodes in the same string must share the same temperature-string serial number; if multiple strings share a system, each string needs a distinct serial number. Specifications Temperature Operating range −55°C to +85°C Accuracy (typical) ±0.2°C over −40°C to +85°C Accuracy (worst case) ±0.4°C over −40°C to +85°C; ±0.5°C over −55°C to −40°C Resolution 0.004°C Measurement interval Configurable - on data read or periodic automatic measurement Warm-up time <10 s Electrical Output interface RS485 (Modbus-RTU) or SDI-12, V1.3 (selectable via ordering code) Power supply 9–28V DC Quiescent current (SDI-12) < (number of nodes × 20 µA) @ 12V DC Current during measuring (SDI-12) < (number of nodes × 1 mA) @ 12V DC Current during data reading (SDI-12) < 20 mA + (number of nodes × 1 mA) @ 12V DC Quiescent current (RS485) < (number of nodes × 400 µA) @ 12V DC Current during measuring (RS485) < (number of nodes × 1.2 mA) @ 12V DC Current during data reading (RS485) < 20 mA + (number of nodes × 1.2 mA) @ 12V DC Mechanical Sensor node dimensions 110 × 23 mm (length × diameter) Maximum nodes per string 36 Minimum node spacing 15 cm (6 in) Maximum cable length 152 m (500 ft) Contact surface materials Sensor node: nylon; cable: PUR Cable construction Kevlar-reinforced, 20AWG, diameter <7.5 mm Connector Cold-pressed terminal or stripped & tinned lead wires (selectable via ordering code) IP rating IP68 Ordering Code Guide Code 1: Product Series DigiTS DigiTS, digital temperature string Code 2: Power Supply A X 9–28V DC Customize Code 3: Output Interface A B RS485 (Modbus-RTU) SDI-12 Code 4: Connector B C Cold-pressed terminal Stripped & tinned lead wires Code 5: Leading Cable Length 002 XXX 2 meters Custom (XXX = length in meters) Code 6: Temperature String Serial Number [TempStringSerialNum] Serial number for this temperature string, 0–65534. All nodes in the same string share this number; each string in a multi-string system must use a different number. Node 1 Info (end node) {Addr/DepthFromEnd} The end node is the node furthest from the collector. Addr is the node's slave address; DepthFromEnd is the distance (cm) from the end node - normally 0 cm for the end node itself. Node 2 Info {Addr/DepthFromEnd} Next node up from Node 1. Addr is the node's slave address; DepthFromEnd is its distance (cm) from the end node. Node 3–36 Info {Addr/DepthFromEnd} One entry per additional node, up to Node 36, each specifying slave address and distance (cm) from the end node. This Configuration: DigiTS-AAB002[0]{1/0}{2/100}{3/130} Power supply 9–28V DC Output interface RS485, Modbus-RTU Connector Cold-pressed terminal Leading cable length 2 meters Temperature string serial number 0 Node count 3 Node 1 (end node) Address 1, 0 cm from end Node 2 Address 2, 100 cm from end Node 3 Address 3, 130 cm from end This 3-node layout places nodes 100 cm apart between Node 1 and Node 2, and 30 cm apart between Node 2 and Node 3 - both above the 15 cm minimum spacing. Different node counts, spacings, power supplies, output interfaces, connectors, and cable lengths are available - contact us to discuss your requirements. Technical Documents User Manual SensorOneSet Configuration Utility (RS485) SensorOneSetSDI12 Configuration Utility (SDI-12) Modbus is a registered trademark of Schneider Electric. SDI-12 is a trademark of the SDI-12 Support Group. INFWIN is a registered trademark of Dalian Endeavour Technology Co., Ltd. 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