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Product 3D Image Get couponsThe SN33 Thermal Gas Flow Switch/Flow Meter is a flow measurement instrument that utilises the principle of heat transfer. The instrument uses the constant temperature difference method to accurately measure the gas flow rate. It has the advantages of small size, high degree of digitisation, easy installation and accurate measurement.
Once a fluid has flowed through the instrument, the heated PT100 will take away the heat from the PT100, the heat taken away by the PT100 will cause the resistance value to rise, the rate of rise has a certain relationship with the flow rate of the fluid, so the flow rate can be detected by measuring this resistance value. In addition, the built-in temperature sensor compensates for the fluid temperature or ambient temperature, so the measurement is stable over the operating temperature range.
-Flow rate setting and detection with digital labelling.
-Detection and display in one unit.
-Switching output, totalised pulse output and analogue output are available.
-Instantaneous flow rate and totalised flow rate can be switched.
-Safety locking key prevents incorrect change of setting value, etc., and prevents misoperation.
-Purge air management in the semiconductor industry, high-precision lead tension bonding, and electronic component placement.
-Factory air management (air, nitrogen), air consumption monitoring of pneumatic parts.
-Paint air management for the automotive industry, railways and other vehicles.
-Burner fire control management in the glass industry and negative ion purification gas management for FPD handling in the liquid crystal industry.
-Filling and packaging, leakage checking in the food industry, CO2 management and photosynthesis promotion in biochemical incubators, and arc welding monitoring at the factory level. Machine tool support, etc.
Model number | SN33-100 | SN33-200 | |
Measuring medium | Air, nitrogen | ||
Flow rate indication range | 10-100L/Min | 20-200L/Min | |
Display function | Instantaneous flow rate, cumulative flow rate | ||
Temperature of the medium | 0~50℃ | ||
Accuracy | ±3%F.S | ||
Repeatability | ±1%F.S | ||
Ambient temperature characteristics | ±2%F.S (15~35℃, 25℃ base), ±3%F.S (0~50℃, 25℃ base) | ||
Current consumption | Below 160m A | ||
Pipe calibre (Rc,NPT.G) | 3/8 | ||
Measuring method | Thermal principle | ||
Number of display digits | 4-digit 8-segment LED | ||
Pressure range | -50KPaA 0.75MPa | ||
Maximum withstand pressure | 1.0MPa | ||
Cumulative flow rate range | 0~999999L | ||
Outputs | NPN open collector Maximum load current: 80 mA, internal voltage drop: 1V or less (at 80mA load current) Maximum applied voltage: 30V, 2 outputs | ||
PNP open collector Maximum load current 80mA, Internal voltage drop: 1.5V or less (at 80mA load current), 2 outputs | |||
Accumulated pulse, current output | |||
Control indicator | Light on when ON Output OUT1: Green Output OUT2: Red | ||
Response time | less than 1s | ||
Hysteresis | Hysteresis mode: Variable (can be set from 0) Upper and lower limit comparison modeNote 1): Fixed (3digits) | ||
Supply voltage | DC12~24V士10% | ||
environmental resistance | Protection class | IP65 | |
Operating temperature range | Operation: 0~50°C, Storage: -25~85°C (but without freezing and condensation) | ||
Withstanding voltage | AC1000V, 1 minute between external terminals together and enclosure | ||
Insulation resistance | 50MΩ or more (DC500V megohmmeter) between the external terminals together with the housing | ||
Note 1. | Upper and lower limit comparison mode: hysteresis (H) is 3digits,P_1,P2 or n_1,n2 should be more than 7digits apart. (In case of output OUT2, n_1,2 becomes n_3,4 and P_1,2 becomes P_3,4). |
SN33- | 100 | G | 1 | N | M | G | D | Details | |||||
SN33- | SN33 Series Thermal Gas Flow Switches/Flowmeters | ||||||||||||
100 | 10-100L/Min | ||||||||||||
200 | 20-200L/Min | ||||||||||||
G | National Threads | ||||||||||||
N | NPT | ||||||||||||
K | Pneumatic Snap-In | ||||||||||||
1 | 1/8 | ||||||||||||
2 | 1/4 | ||||||||||||
3 | 3/8 | ||||||||||||
4 | 1/2 | ||||||||||||
N | NPN Switches | ||||||||||||
P | PNP Switches | ||||||||||||
PUSLE | Pulses | ||||||||||||
4-20mA | Currents | ||||||||||||
M | M12 Plugs 3M | ||||||||||||
N | No Leads | ||||||||||||
G | Fixed Unit Displays | ||||||||||||
T | Adjustable Unit Displays | ||||||||||||
D | Custom Specifications | ||||||||||||
* The selection table is for parameter selection only and is shipped with the corresponding code for the parameter. |