- Ex-protection version of the iPR-B3
- Suitable for all applications in explosion-proof areas
- Certified according to European Classification ATEX II 1 G Ex ia IIC T4 Ga
- Permanent inline real-time measurement of the concentration of dissolved solids
Automatic process refractometer iPR – EX
Fully automatic process refractometer for direct measurement of dissolved solids, process monitoring, and control. Principle of the critical-angle refractometer with a sapphire prism and high-resolution photodiode array; no influence of color and opacity of the medium on the measuring result. Measuring head made of stainless steel, chemical resistant, food-safe, hygienic, for process temperatures up to 120 °C (with connected water cooling) and pressures up to 1 MPa.
The explosion protection version of the process refractometer consists of an intrinsically safe, single-certified sensor, which is installed in the hazardous area. The measuring signals are routed to the non-explosive area via a special cable (maximum length 500 m) and connected to 4 Zener barriers. The connection to the central control system is realized with an RTU Modbus or serial RS 485 interface.
Alternatively, Schmidt + Haensch offers a control unit, which is also installed outside the hazardous area. The 7 “touch screen is individually configurable. The measured data can be output via Ethernet as a 24 V or 4-20 mA signal or control a relay.
For data transmission to other systems, serial RS 232, 485 interfaces, a CAN bus or UPC server are available.
Up to two measuring heads can be connected at the same time.
|Standards||ATEX II 1 G Ex ia IIC T4 Ga
IEC in preparation
|Measuring range||1,32000 – 1,52000 nD|
|Ambient temperature||-20 °C to +65 °C|
|Process Temperature||-20°C to +120 °C*|
|Temperature resolution/precision||0.01°C / ±0.2°C (0° to 70°C)|
|Process pressure||0 to 1 MPa (145 psi, 10 bar)|
|Wetted parts||Sapphire (prism), stainless steel, FKM|
|Protection class||IP 67|
|Light source / wavelength||LED, 589 nm|
|Interface, switches||ModBus, RS485 and 24V with external Zener barriers|
|Dimensions||330mm x 149mm (length x diameter)|
|Operation||1 and 2 measuring headsets are available, connectable with built-in Zener barriers|
|Display||7″ Touchscreen, 800×480 pixel|
|DIN rail parts (expandable)||Switch inputs (24 V) and outputs (24 V / relay / 4-20mA) / Communication (RS232 / RS485), CAN, UPC Server|
|Highlights||Configuration of measuring head and outputs / Adjust switching thresholds and analog outputs /
Concentration and other scales user programmable
|Power||85V … 265V 50/60Hz|
* with cooling by cooler circuit only, electronic max. +65°C