Channels SE1 to SE5 can be individually configured for single-ended measurement or digital I/O. Input voltage range is 0 to +2500 mV with 0.6 mV resolution.

2 excitation channels (2.5 or 5 V), and one switched battery output.

SE1 to SE4

1 switch closure pulse input, 1 low level ac pulse input.

One of the control ports can be used as an SDI-12 port.

8 differential (DF) or 16 single-ended (SE) individually configured. Channel expansion provided by AM16/32 and AM25T multiplexers. 

3 switched voltage, active only during measurement, one at a time.  RANGE AND RESOLUTION: Voltage outputs programmable between ±2.5 V with 0.67 mV resolution.

Any of the 16 SE analog inputs can be used for period averaging. 

Two 24-bit inputs selectable for switch closure, high frequency pulse, or low-level ac.

8 ports software selectable, as binary inputs or control outputs. C1-C8 also provide edge timing, subroutine interrupts/wake up, switch closure pulse counting, high frequency pulse counting, asynchronous communications (UART), SDI-12 communications, and SDM communictions. 

Control ports 1, 3, 5, and 7 may be configured for SDI-12 asynchronous communications. Up to ten SDI-12 sensors are supported per port. It meets SDI-12 Standard version 1.3 for datalogger mode. 

The CR5000 can measure one channel and store the result in 500 µs; all 40 SE* channels can be measured in 8 ms (5 kHz aggregate rate). 

 20 DF* or 40 SE, individually configured. Channel expansion provided through AM16/32, AM416, and AM25T Multiplexers. 

4 switched voltage; 4 switched current; 2 continuous voltage; switched outputs active only during measurements, one at a time. 

 The average period for a single cycle is determined by measuring the duration of a specified number of cycles. Any of the 40 SE analog inputs can be used; signal attenuation and ac coupling may be required. 

Two 16-bit inputs selectable for switch closure, high frequency pulse, or low-level ac. 

8 ports selectable as binary inputs or control outputs. 

The Synchronous Device for Measurement (SDM) connections C1,C2, and C3 along with the adjacent 12 volts and ground terminals are used to connect SDM sensors and peripherals. 

System tasks initiated in sync with real-time up to 64 Hz. One measurement with data transfer is possible at this rate without interruption.

2 differential or 4 single-ended, individually configured. 

2 switched excitations, active only during measurement, one at a time. 

The average period for a single cycle is determined by measuring the duration of a specified number of cycles. Any of the 4 single-ended analog input channels can be used. Signal attentuation and ac coupling is typically required. 

2 eight-bit or 1 sixteenbit; software selectable as switch closure, high frequency pulse, or low-level ac modes. An additional channel (C2/P3) can be software configured to read switch closures at rates up to 40 Hz. 

Port C1 is software selectable as a  binary input, control output, or as an SDI-12 port. Port C2/P3 is input only and can be software configured as an SDI-12 port, a binary input, or as a switch closure counter (40 Hz max). 

Digital I/O Ports C1-C2 support SDI-12 asynchronous communication; up to ten SDI-12 sensors can be connected to each port. Meets SDI-12 standard Version 1.2 for datalogger and sensor modes. 

Program is synchronized with real-time up to 100 Hz. Two fast (250 µs) single-ended measurements can write to final storage at 100 Hz. Burst measurements to 1.5 kHz are possible over short intervals.

12 differential or 24 single-ended, individually configured. Channel expansion provided through AM416 Relay Multiplexers and AM25T Thermocouple Multiplexers.

4 switched, active only during measurement, one at a time; 2 continuous. 

The average period for a single cycle is determined by measuring the duration of a specified number of cycles. Any of the 24 SE analog inputs can be used. Signal attenuation and ac coupling are typically required. 

Four 8-bit or two 16-bit inputs selectable for switch closure, high frequency pulse, or low-level AC. Counters read at 10 or 100 Hz.

8 ports selectable as binary inputs or control outputs. Ports C5-C8 capable of counting switch closures and high frequency pulses. 

Digital I/O Ports C5-C8 support SDI-12 asynchronous communication; up to ten SDI-12 sensors can be connected to each port. Meets SDI-12 Standard version 1.2 for datalogger and sensors mode. 

[Number of Sensors]

Up to 32 single-ended or differential sensors that require two wires (e.g., thermistors, half bridges)

Up to 16 single-ended or differential sensors that require four wires (e.g., full bridges, four-wire half bridges) 

Up to 48 half-bridge measurements (assumes common excitation and completion resistors at the datalogger)

Up to 32 vibrating wire sensors (16 with temperature) in conjunction with a CR10(X) or CR23X and AVW1, AVW4, or AVW100 Vibrating Wire Sensor Interface

Up to 32 gypsum soil moisture blocks (model 223 or 253). The AM16/32 eliminates the requirement for dc blocking capacitors, significantly reducing sensor cost 

Up to 48 CS615 Water Content Reflectometers (assumes common excitation) 

[Compatible dataloggers]

CR10, CR10X, CR23X, 21X, CR7, CR5000; CR5000 requires OS version 1.3 or higher

Single pole double throw; break before make

Gold-clad silver

5 A @ 30 Vdc, 0.3 A @ 110 Vdc, 5 A (1/10 hp) @ 125 Vac, 5 A (1/6 HP) @ 277 Vac

9 to 18 Vdc/360 Ohms•±10%

 Mechanical 10⁷