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Dwyer APM-221 | Analogue Input Panel Meter | 12-24 VDC, 2 Relays, 4-20 mA Output
The Dwyer APM-221 is a dual-line configurable panel meter that acts as a flow rate/totaliser, built with 12-24 VDC power, 2 alarm relays and a 4-20 mA output. The APM-221 takes a 4-20 mA or 0-10 V input, supplies 24 VDC to the flowmeter, and shows rate and total at the same time.
- APM-221 configuration: 12-24 VDC, 2 alarm relays, a 4-20 mA output
- Square root extraction for DP flow and programmable exponents for open channel flow on the APM-221
- Non-resettable grand total; APM-221 total reset from the front panel or a remote switch on F4
- APM-221 accuracy ±0.03% of calibrated span ±1 count
- NEMA 4X, IP65 front on the APM-221; free USB programming resident on the meter
- Specifications
- Features
- Downloads
| Part Number | APM-221 |
| Brand | Dwyer |
| Power Supply | 12 to 24 VDC ±10%, 15 W max |
| Relays | 2 SPDT (Form C), 3 A @ 30 VDC and 125/250 VAC resistive |
| Analogue Output | 4 to 20 mA |
| Input | 0 to 20 mA, 4 to 20 mA, 0 to 5 V or ±10 V |
| Accuracy | ±0.03% of calibrated span ±1 count |
| Display | Dual-line 6-digit, 0.60 in and 0.46 in |
| Enclosure Rating | NEMA 4X, IP65 front |
| Relay Time Delay | 0 to 999.9 s on/off, per relay |
| Decimal Points | Five positions, user selectable |
| Programming | Free USB software resident on meter |
| Operating Temperature | -40 to 149°F (-40 to 65°C) |
| Approvals | CE, RoHS, cUL, UL |
- Password protection with three tiers.
- Calculus for flow and circular horizontal tanks.
- Configurable exponent, square root, or 32-point linearization.
- Control of many pump alternators.
- Rate expressed in terms of units per minute, hour, day, or second.
- Total, grand total, or grand total that cannot be reset.
- Options for isolated 4–20 mA outputs and two or four relays.
- Extension modules provide digital I/O and an external 4-relay.
- Serial connection possibilities include RS-232, RS-422, and RS-485.
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