1. The meter can be called a universal analog input display meter. It can be matched with various sensors with analog output to display the actual physical quantity. Such as temperature mitter, frequency converter, motor speed, pressure, liquid level, concentration, etc. 2. The inst ent supports current input or voltage input. 3. Default adaptation: 0-10V, 2-10V, 0-20mA, 4-20mA. By setting the bias parameter and gain parameter, it can adapt to other inputs in the range of 0-10V, or 0-20mA. 4. It is displayed as a percentage by default. You can also set your own display range through F0-2 - F0-4. 5. The inst ent with 485 interface has already supported the communication between the meters, and it is convenient to realize multiple displays. Model description:standard version: HXDSBOXAH-NR: With RS485 version: HXDSBOXA-485: With relay output version: HX DS BOXAI-RL Standard version and version with RS485, rated power supply voltage range: DC6-25V, power consumption: 24V/40mA: with relay output version, rated power supply voltage Range: DC8-25V, power consumption: 24V/50mA: power supply anti-reverse connection and surge protection Colour:gray Material:plastic Size:79 x 43 x 25mm Package Contents: 1 x Digital display meter Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.