Product Overview
The ILR family is the meter-mounted electronics for the Industrial Oval Gear meter — the local-display registers and the pulse sensors that turn the rotor signal into a reading. The ILR-700 is the standard battery-powered register: a 6-digit LCD accurate to three decimals showing rate or total, with an 11-digit lifetime totalizer alongside a resettable batch total, all field-recalibratable from the front panel. The ILR-701 adds 9-point linearization, and the ILR-750 adds a scalable pulse output and a 4–20 mA analog output for a PLC or DCS. Where the reading leaves the meter as raw pulse, the ILR-740 / 741 transmitters and the NAMUR, PNP, NPN, reed and Hall sensor boards cover it — one reed / Hall board fits every 1/2 to 3 in. meter and gives a direction-sensing dual output, and the open-collector and NAMUR sensors are intrinsically safe for classified areas. One note on fit: the ILR register series does not go on the 3 in. meter, where the ER-420, ER-500 or F-series takes over.
Key Features & Benefits
- Reads right at the meter — a large 6-digit LCD shows rate or total at the meter with no power to run and no external display to wire
- Scale up the output without changing the meter — step from the local ILR-700 to the ILR-750 for a scaled pulse and a 4–20 mA signal, or to a transmitter for raw pulse, all on the same meter
- Lifetime and resettable totals together — an 11-digit lifetime totalizer that cannot be reset sits alongside a resettable batch total — custody history and per-batch counting at once
- One sensor board for every meter size — a slide switch sets the size, so the same reed / Hall board stocks for 1/2 in. through 3 in. — one spare on the shelf instead of one per size
- Intrinsically safe pulse options — NAMUR and open-collector IS sensors take the meter into classified areas with the right barrier
- Field-recalibratable — the calibration factor lives in non-volatile memory and reprograms from the front panel as fluids or duty change
Specifications
- Function
- The meter-mounted electronics that turn the oval-gear rotor pulses into a reading — a local-display register at the meter, or a pulse sensor / transmitter that sends raw or scaled pulses to a PLC, counter or flow computer
- Models
- ILR-700 standard register; ILR-701 adds 9-point linearization; ILR-750 adds a scalable pulse output and a 4–20 mA analog output; ILR-740 pulse transmitter (reed); ILR-741 transmitter with a NEMA 4X enclosure and adapter
- Display
- 6-digit liquid-crystal display accurate to three decimal places; flow rate or totalizer selectable from the programming menu
- Totalizers
- 11-digit non-resettable lifetime totalizer plus a 6-digit resettable totalizer and a batch totalizer; batch in pints, quarts, gallons or liters, totalize in gallons or liters
- Outputs
- ILR-750 — scalable pulse output (settable pulse length) and a 4–20 mA analog output representing flow rate (programmable min / max). Raw unscaled pulse via the ILR-740 / 741 transmitters and the reed / Hall boards
- Linearization
- 9-point linearization on the ILR-701 and ILR-750 (test medium water)
- Pulse sensors / boards
- NAMUR 2-wire (normally open), PNP and NPN open-collector 3-wire (5–30 VDC), and reed and Hall boards — one reed / Hall board covers all 1/2 to 3 in. meters and gives two pulse outputs 90° out of phase to detect flow direction
- Hazardous-area rating
- The NPN / PNP open-collector sensor is intrinsically safe for Class I, II and III, Division 1 in both the USA (Groups A–G) and Canada (Groups A–D), and carries ATEX / IECEx Ex ia IIC approval. The NAMUR sensor carries an ATEX intrinsic-safety approval for gas areas. Both sensors are 316L stainless, IP66 / IP67. A classified-area installation needs the right barrier and wiring on your side; confirmation of the marking and its conditions of use is routed through Badger Meter before a hazardous-area build is quoted
- Power
- ILR registers run on a replaceable long-life lithium battery; the Hall board is 24 VDC and the PNP / NPN sensors 5–30 VDC
- Enclosure
- ILR register IP65; sensors IP66 / IP67; the ILR-741 transmitter adds a NEMA 4X enclosure
- Operating temperature
- ILR registers −4 to 176°F (−20 to 80°C); the ILR-740 / 741 transmitters −40 to 257°F (−40 to 125°C)
- Programming
- Front-panel programming; calibration factor and unit of measure set at factory test and saved in non-volatile memory; field-recalibratable, with a programmable meter pulse rate
- Meter compatibility
- Mounts on the Industrial Oval Gear meters. The ILR register series does not fit the 3 in. meter — a remote register with a sensor board carries the signal on that size
- Mounting
- Meter-mounted on top of the meter; can be set inline or perpendicular to the flow
Common Applications
- Local rate and batch display at the meter for dispensing and totalizing
- Scaled pulse and 4–20 mA into a PLC or flow computer (ILR-750)
- Raw unscaled pulse to a counter or batch controller via the transmitters and sensor boards
- Direction-sensing pulse where flow can reverse
- Intrinsically safe pulse pickup in classified dispensing areas
Design & Selection Considerations
- Decide local display or raw pulse first — if the reading is read at the meter, the ILR-700 / 701 / 750 register is the choice; if it feeds a PLC, counter or flow computer, the ILR-740 / 741 transmitter or a NAMUR / PNP / NPN / reed / Hall sensor board sends the pulse instead. The ILR-750 does both — local display plus a scaled pulse and 4–20 mA. Use the input form to tell us where the reading goes and we’ll pick the register or the sensor.
- Not for the 3 in. meter — the ILR register series is not compatible with the 3 in. meter — on that size the ER-420, ER-500 or F-series, paired with a sensor board, takes the pulse instead. Use the input form to tell us the meter size and we’ll confirm the register fits.
- Match the sensor to the area classification — general-purpose service can use the reed or Hall board; a classified area needs the intrinsically safe NAMUR or open-collector sensor with the right barrier and wiring on your side. Use the input form to give us the area classification and we’ll specify the IS sensor and the documentation.
To size & select the right ILR register or sensor:
Use the input form to tell us the meter it mounts on, the signal you need — a local display, a scaled pulse, a 4–20 mA loop, HART 7.0, Modbus RTU, an alarm contact or batch control — the power source and the area classification, and we’ll match the register or sensor to it.
Flow Meter Application Sheet ›Talk to an engineer directly — Scott Prater, Principal · 917-580-0878 · scott@pratertechnical.com
Specifications compiled by Prater Technical Partners from Badger Meter Industrial Oval Gear positive-displacement meter product literature.