Integration and OEM

A variety of cable terminations and optional millivolt adapters make LI-COR sensors easy to integrate into systems. Quantity discounts and special pricing are available for OEM customers. A description of cable terminations and millivolt adapters is below. If you have any questions or would like to discuss how these sensors can integrate into your existing setup please contact LI-COR.

Cable Termination

There are several options available for cable lead termination on LI-COR radiation sensors. The two letters at the end of the model number denote the type of termination (e.g. "SA"). The following table describes these options:

Type	Termination	Description
SA		Sensor lead terminates with a BNC connector for use with a LI-COR light meter or data logger. Sensor delivers a microamp current output. Type SA sensors can be used with non-LI-COR devices requiring a millivolt signal, with the use of the appropriate Millivolt Adapter. This adapter mates with the sensor's BNC connector and terminates in bare wire leads. The resulting output is in millivolts, and is proportional to the sensitivity of the sensor to which it is connected.
SZ		Sensor lead terminates with bare wires for use with a non-LI-COR metering device/data logger, or with the 1400-301 Terminal Strip, when used with the LI-1400 DataLogger. Sensor delivers a microamp current output. If required, a shunt resistor can be used across the terminals of the metering device to generate a millivolt output.
SL		The sensor is coupled with a unique millivolt adapter containing a variable resistor. Output is standardized to 10 mV at full scale. Ultimate termination is bare leads. Designed for use with non-LI-COR devices that require a millivolt signal.

Millivolt Adapters

Millivolt adapters are used only for connecting sensors to a user's datalogger or stripchart recorder, not the LI-1400 or other LI-COR readout devices.

The millivolt adapter connects to the BNC connector of the sensor, and the wire leads of the adapter are connected to the data logger. Sensor output (in millivolts) when using the millivolt adapter can be computed using "Ohm's Law" (Voltage = Current X Resistance).

Example: Calculate the millivolt output of an LI-190 Quantum Sensor which has a calibration constant of 8.0 µA/1000 µmol s-1 m-2. Assume the 2290 millivolt adapter is used with the sensor.

Type "SL" sensors are available for the LI-190, LI-191, LI-200, and LI-210 Sensors. The Type SL Sensor produces a standardized millivolt output, and may be used in place of the Type SA Sensor and Millivolt Adapter.

2290 Millivolt Adapter

For LI-190SA Quantum Sensor, LI-191SA Line Quantum Sensor, or LI-210SA Photometric Sensor (604 Ohm resistance).

2220 Millivolt Adapter

For LI-200SA Pyranometer Sensor (147 Ohm resistance).

2291 Millivolt Adapter

For LI-192SA Underwater Quantum Sensor or LI-193SA Spherical Quantum Sensor (1210 Ohm resistance).

Table 1. Millivolt adapters for type "SA" sensors