EM1NV SENSIRION, EM1NV Datasheet
EM1NV
Specifications of EM1NV
Related parts for EM1NV
EM1NV Summary of contents
Page 1
... EM1 Mass Flow Meter (MFM) enables fast and economical measurement of gas flows over a very wide dynamic range. Its leading price/performance ratio is based on Sensirion’s unsurpassed CMOSens sensor technology which combines a sensor element with the amplification and A/D converter circuit on one single CMOS chip. This results in good performance, fast response time and large dynamic range at very attractive cost ...
Page 2
... However, the standard calibration gas is nitrogen. Please contact Sensirion, if you would like to use the sensor for applications with other gases. A free PC software to read out the CMOSens Mass Flow Meter can be downloaded from www ...
Page 3
... Better accuracy available on request full scale (FS measured value (m.v rate = of reading 12 Other gases for volume applications on request 13 All data for 1’013 mbar, 1 bar = 100 000 Pa = 401.9 inch H 14 www.sensirion.com Condition EM1_H… 0-0.05 2.5 - 100 <2 100% FS 5.0 < 0.5 2.5 - 100% FS < ...
Page 4
... EM1 Mass Flow Meter Resolution (EM1_V) at different Flow Levels and integration time. Flow Level Flow Level 200 ln/min 50 ln/min < 5 ln/min Mass Flow Integration Time 12.0 bar / 174 psi for short time operation, higher values for volume applications on request 1 www.sensirion.com Condition 0 – – 140 Si SiOx, Gold, Viton 3 4 Polycarbonate ...
Page 5
... CMOSens EM1 Mass Flow Meter are achieved. The above mentioned thermal principle requires information about the gas type to be measured. The www.sensirion.com ® CMOSens gas types are available on request. In Figure 3 the repeatability of the CMOSens devices is compared with the repeatability of a typical Mass Flow Controller (MFC) ...
Page 6
... Please check also www.sensirion.com for further details. For volume customers other gas type calibrations are available on request and availability. Please contact Sensirion for further details if this option is applicable to you. 1.7 The packaging method of the CMOSens with the inert housing and the sealing materials ensure a tight and highly resistant sealing of the device ...
Page 7
... EM1NR 1 ml /min n EM1NV 1/128 l /min n Example for EM1NV: a received value of +1234 (dec) corresponds either to 9.641 ln/min in flow mode or 12.34 °C in temperature mode. An explanation of the overflow modes can be found in section 1.1. received received flow value (hex) value (dec) [ln/min ] 0x7852 ...
Page 8
... EEPROM. These commands are marked in the column ‘EEPROM Write Access’. Therefore excessive use of one of these commands e.g. for reconfiguration should be avoided. E.g. using the GET command every 5 seconds would reduce the guaranteed life time of the EEPROM to 10e7 / (60/5*60*24 days. www.sensirion.com With the exception of the stop s command, all commands have to be sent in the ASCII-format and terminated by the return key (↵ ...
Page 9
... Internal error www.sensirion.com 3.3 Measurement Strategy As mentioned in paragraph 3.1 (Important Notes) excessive EEPROM write cycles should be avoided. Sensirion therefore recommends to use the EM1 in PUSH-mode strategy: The EM1 is set to constant measurement measurement once it becomes available. Check Table 7 for the update rate (data rate). ...
Page 10
... Voltage Range Voltage Threshold Low High Hysteresis Resistance Note: Free PC Software supporting serial RS232 communication can be downloaded from http://www.sensirion.com www.sensirion.com ® EM1 Mass Flow Meter -40°C to 100°C / -40°F to 212°F 0°C to 60° °F to 140°F 8.0 bar / 116 psi for steady operation, 12.0 bar / 174 psi for short time operation 40 ...
Page 11
... Only use connectors with a parallel external thread of correct size. Do not use connectors with tapered external thread. For best measurement results Sensirion advises strongly the use of straight inlet and outlet connectors. Standard version straight Figure 8: Physical dimensions and mounting information of the CMOSens www ...
Page 12
... RoHS compliance all Microprocessor EOL. Change of microprocessor. SPI Interface removed 12,14 order information 3,13,14 Flowunit corrected, Address Sensirion China Data Sheet EM1 – v3.0 /March 2009 Code EM1NV4R0V_1A EM1NR4R0V_1A EM1NL4R0V_1N EM1NH4R0V_1N - Gas Pressure 1013 mbar / 14.69 psi ...
Page 13
... SENSIRION does not assume any liability arising out of any application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. ...
Page 14
... Gyeonggi-Province, South Korea Sales Office Japan (for Japanese customers only) Sensirion Japan Co. Ltd Representative Director: Keiichi Hasegawa Shinagawa Station Bldg. 7F, 4-23-5, Takanawa, e-mail: info@sensirion.co.jp Minato-ku, Tokyo, Japan Sales OfficeChina (for Chinese customers only) SENSIRION China Co. Ltd. Room 2411, Main Tower Jin Zhong Huan Business Building, Futian District, Shenzhen, PR China www ...