The INVALCO Series 4300 is an explosion-proof flow rate indicator and totalizer for pulse-producing flowmeters. It shows a 5-digit rate and an 8-digit total at the same time and accepts magnetic pickup, optically isolated DC pulse or contact closure inputs. It runs on internal lithium batteries, an external DC supply, or the 4-20 mA output loop (the battery stays in as standby), with an isolated scaled pulse output, 20-point linearization, flash storage of setup data and an optional RS-485 Modbus card with data logger.
Key specifications
Displays: Rate 5 digits, 0.35" high (updates 1/s on 4300-3A, 8/s on 4300-3I / 3O); total 8 digits, 0.2" high
Power: Two C-size lithium batteries; loop-powered models 8.5-30 VDC, 8.5 V max. loop burden, reverse polarity protected
Battery life (4300-3A): 10 years idle to 8 hrs/day; 8.4 years at 24 hrs/day (pulse output off)
Magnetic pickup input: 0-3,500 Hz, 10 mV p-p trigger, +/-30 VDC protected
Opto-isolated DC pulse input: 4-30 VDC high, below 1 VDC low, 0-5 kHz, 0.1 ms min. pulse
Contact closure / reset inputs: 100 kOhm pull-up to +3.6 VDC; switch debounce filter 0-40 Hz
K-factor: 0.001 to 99,999,999 with 20-point linearization
Accuracy: 0.01% of reading +/-1 count; analog output 0.025% FS at 20 °C
Pulse output: Isolated photoMOS relay, 30 VDC / 100 mA, 0.0625-0.5 s duration, scale divider /1, /10, /100 or off
Analog output (3I / 3O): 2-wire 4-20 mA following rate, 8 updates per second
Environment: -4 to 158 °F (-20 to 70 °C); extended -22 to 158 °F; 0-90% RH noncondensing
Enclosure / approval: Explosion-proof Class I Div 1 Groups B, C, D and Class II Groups E, F, G; CSA/NRTL listed LR91109
How to read the model code
Example: 4300-3A. Read the code left to right; each position selects one option:
4300-3A: Battery powered; rate per day, hour or minute; totals GAL, BBL, MCF, M3
4300-3I: Loop powered with 4-20 mA output; rate per hour, minute or second; totals GAL, LIT, FT3, M3
4300-3O: Loop powered with 4-20 mA output; rate per day, hour or minute; totals GAL, BBL, MCF, M3
4300-3M: RS-485 Modbus RTU option with data logger (logs the total to flash every 24 hours; requires external DC power)
The bulletin's "Rate Descriptors" list is misprinted (model numbers run into the unit lists); the units above follow the bulletin's part-number decoding table. Confirm the exact model with the factory before ordering.
Pricing and lead time are quoted per configuration. Send the model code (or your application details), product, flow range, and pressure/temperature to Flow Measurement Services for a quote. Specifications summarized from Smith Meter (INVALCO) bulletin SSIN037 Rev 0.1 (11/18); confirm current data with the factory before ordering.
Smith Meter (formerly FMC Technologies / TechnipFMC Measurement Solutions), now manufactured by Guidant. Flow Measurement Services supplies and services Smith Meter equipment.