
The Most Effective Refrigerant Monitor in the Industry
RLDS delivers the best refrigerant monitoring available, with industry-leading MDL (minimum detectable level) of 1 ppm for halogenated gases, the fastest sampling frequency and the widest range of refrigerants accurately detected. The large graphic LCD display and LED status indicators provide a system-wide overview at a glance.

RLDS enhances effective refrigerant management
The RLDS enhances effective refrigerant management, detecting leaks early to enable cost savings by reducing refrigerant discharge, enhancing energy effi ciency and reducing risk of refrigeration failure and product loss. A variety of communication interfaces are available, including Modbus, BACnet and LonWorks, allowing easy integration into BMS systems and remote monitoring solutions.
Technical Data
Gas Library | |
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MEASUREMENT | RLDS |
UNIT | CFC: R11, R12, R113, R114, R502, HFP HFC: R125, R134a, R236FA, R245Fa, R32, R404a, R407a, R407c, R-407F, R410a, R422a, R422d, R427a, R507, R508b HCFC: R123, R124, R21, R22, R227, R23, R401a, R402a, R402b, R408a, R409a, R500, R503 Halon: H1211, H1301, H2402 Other: FA188, FC72, H1234YF, H1234ZE, N1230, N7100, N7200, N7300, N7600, R424A, R426A, R438A, CUSTOM |
DESCRIPTION | RLDS CO2 |
CO2/R744 | |
RLDS |
RLDS | |
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MEASUREMENT | All gases 0 to 10,000 ppm |
UNIT | RLDS CO2 |
DESCRIPTION | CO2 0 to 8,000 ppm |
RLDS | |
1 ppm MDL (most gases) +1ppm +10% of reading from 0-1,000 ppm (most gases) +1ppm +2% of reading with fi eld calibration (most gases) +10ppm +15% of reading from 0-1,000 ppm (R-11, R-21, R32) |
CFC: R11, R12, R113, R114, R502, HFP HFC: R125, R134a, R236FA, R245Fa, R32, R404a, R407a, R407c, R-407F, R410a, R422a, R422d, R427a, R507, R508b HCFC: R123, R124, R21, R22, R227, R23, R401a, R402a, R402b, R408a, R409a, R500, R503 Halon: H1211, H1301, H2402 Other: FA188, FC72, H1234YF, H1234ZE, N1230, N7100, N7200, N7300, N7600, R424A, R426A, R438A, CUSTOM | |
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MEASUREMENT | RLDS CO2 |
UNIT | +5 ppm +5% of reading from 0-1,000 ppm +10% of reading from 1,000-4,000 ppm +15% of reading from 4,000-8,000 ppm |
DESCRIPTION | RLDS |
+0.8% (R134a) of reading per OC between purge cycles | |
MEASUREMENT | CFC: R11, R12, R113, R114, R502, HFP HFC: R125, R134a, R236FA, R245Fa, R32, R404a, R407a, R407c, R-407F, R410a, R422a, R422d, R427a, R507, R508b HCFC: R123, R124, R21, R22, R227, R23, R401a, R402a, R402b, R408a, R409a, R500, R503 Halon: H1211, H1301, H2402 Other: FA188, FC72, H1234YF, H1234ZE, N1230, N7100, N7200, N7300, N7600, R424A, R426A, R438A, CUSTOM |
UNIT | RLDS CO2 |
DESCRIPTION | CO2/R744 |
RLDS | |
All gases 0 to 10,000 ppm | |
MEASUREMENT | RLDS CO2 |
RLDS CO2 | |
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UNIT | CO2 0 to 8,000 ppm |
DESCRIPTION | RLDS |
1 ppm MDL (most gases) +1ppm +10% of reading from 0-1,000 ppm (most gases) +1ppm +2% of reading with fi eld calibration (most gases) +10ppm +15% of reading from 0-1,000 ppm (R-11, R-21, R32) | |
RLDS CO2 | |
MEASUREMENT | +5 ppm +5% of reading from 0-1,000 ppm +10% of reading from 1,000-4,000 ppm +15% of reading from 4,000-8,000 ppm |
CO2/R744 |
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Measuring Range |
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RLDS |
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All gases 0 to 10,000 ppm |
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RLDS CO2 |
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CO2 0 to 8,000 ppm |
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Accuracy |
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RLDS |
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1 ppm MDL (most gases) +1ppm +10% of reading from 0-1,000 ppm (most gases) +1ppm +2% of reading with fi eld calibration (most gases) +10ppm +15% of reading from 0-1,000 ppm (R-11, R-21, R32) |
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RLDS CO2 |
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+5 ppm +5% of reading from 0-1,000 ppm +10% of reading from 1,000-4,000 ppm +15% of reading from 4,000-8,000 ppm |
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Temperature Drift |
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RLDS |
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+0.8% (R134a) of reading per OC between purge cycles |
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Technical Specifications
Coverage | |
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SPECIFICATION | Zones: 4,8,12 and 16 zone systems available |
DESCRIPTION | Proprietary non-dispersive infrared (NDIR) technology |
12.23”H x 13.7” x 4.96 (21.0642 cm x 34.7980 cm x 12.5984 cm) | |
15 lbs (6.8 kg) | |
Front Panel with 3 Indicator Lights: • Green = Monitor is powered on. LED glows during normal operation; fl ashes when unit is in warm-up mode • Red = Alarm. LED fl ashes when any point has exceeded the alarm setting • Yellow = Fault. LED fl ashes when there is a system fault |
Zones: 4,8,12 and 16 zone systems available | |
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SPECIFICATION | Full two-way communication with BMS via RS-485 serial interface. RS-232C communication port standard. |
DESCRIPTION | Four SPDT alarm contacts are provided rated 2A at 250 VAC (inductive), 5A at 250 VAC (resistive).Three assigned to ppm level alarms, one assigned to system faults. |
Optional dual 4-20mA DC isolated outputs. Channel 1 = zone area, Channel 2 = ppm | |
Less than 40dB(A) @ 10 feet (3 meters) | |
5 to 315 seconds – depending on air line length and number of zones |
Sensor | |
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SPECIFICATION | Automatic or manual (hold) |
DESCRIPTION | 1200 ft max (500 ft for NH3) for combined length of sample and exhaust tubing (each zone) |
Fully automatic system reset. All programmed parameters retained. | |
32°F to 122°F (0°C to 50°C) | |
5% to 90% RH non-condensing |
Proprietary non-dispersive infrared (NDIR) technology | |
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SPECIFICATION | 6,562 ft (2,000 m) |
DESCRIPTION | 100 to 240 VAC, 50/60 Hz, 20W |
UL 61010-14, CAN/CA 22.2 No. 61010-1; EN61010-1, EN61326; EN14624; CE Mark | |
SPECIFICATION | Proprietary non-dispersive infrared (NDIR) technology |
DESCRIPTION | 12.23”H x 13.7” x 4.96 (21.0642 cm x 34.7980 cm x 12.5984 cm) |
Dimensions | |
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15 lbs (6.8 kg) | |
Front Panel with 3 Indicator Lights: • Green = Monitor is powered on. LED glows during normal operation; fl ashes when unit is in warm-up mode • Red = Alarm. LED fl ashes when any point has exceeded the alarm setting • Yellow = Fault. LED fl ashes when there is a system fault | |
Full two-way communication with BMS via RS-485 serial interface. RS-232C communication port standard. | |
SPECIFICATION | Four SPDT alarm contacts are provided rated 2A at 250 VAC (inductive), 5A at 250 VAC (resistive).Three assigned to ppm level alarms, one assigned to system faults. |
DESCRIPTION | Optional dual 4-20mA DC isolated outputs. Channel 1 = zone area, Channel 2 = ppm |
12.23”H x 13.7” x 4.96 (21.0642 cm x 34.7980 cm x 12.5984 cm) |
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Weight |
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15 lbs (6.8 kg) |
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User Interface |
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Front Panel with 3 Indicator Lights: • Green = Monitor is powered on. LED glows during normal operation; fl ashes when unit is in warm-up mode • Red = Alarm. LED fl ashes when any point has exceeded the alarm setting • Yellow = Fault. LED fl ashes when there is a system fault |
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Communications |
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Full two-way communication with BMS via RS-485 serial interface. RS-232C communication port standard. |
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Alarms |
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Four SPDT alarm contacts are provided rated 2A at 250 VAC (inductive), 5A at 250 VAC (resistive).Three assigned to ppm level alarms, one assigned to system faults. |
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Conditioned Signal |
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Optional dual 4-20mA DC isolated outputs. Channel 1 = zone area, Channel 2 = ppm |
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System Noise |
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Less than 40dB(A) @ 10 feet (3 meters) |
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Response Time |
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5 to 315 seconds – depending on air line length and number of zones |
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Sampling Mode |
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Automatic or manual (hold) |
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Monitoring Distance |
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1200 ft max (500 ft for NH3) for combined length of sample and exhaust tubing (each zone) |
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Power Safety Mode |
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Fully automatic system reset. All programmed parameters retained. |
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Operating Temperature |
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32°F to 122°F (0°C to 50°C) |
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Ambient Humidity |
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5% to 90% RH non-condensing |
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Altitude Limit |
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6,562 ft (2,000 m) |
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Power |
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100 to 240 VAC, 50/60 Hz, 20W |
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Approvals |
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UL 61010-14, CAN/CA 22.2 No. 61010-1; EN61010-1, EN61326; EN14624; CE Mark |
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Order Information
808-2004 | |
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PART # | RLDS 4 Zone |
DESCRIPTION | RLDS 4 Zone, w/HHT & Gateway |
RLDS 8 Zone | |
RLDS 8 Zone, w/HHT & Gateway | |
RLDS 12 Zone |
RLDS 4 Zone | |
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PART # | RLDS 12 Zone, w/HHT & Gateway |
DESCRIPTION | RLDS 16 Zone |
RLDS 16 Zone, w/HHT & Gateway | |
RLDS CO2 4 Zone | |
RLDS CO2 4 Zone, w/HHT & Gateway |
808-2005 | |
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PART # | RLDS CO2 8 Zone |
DESCRIPTION | RLDS CO2 8 Zone, w/HHT & Gateway |
RLDS CO2 12 Zone | |
RLDS CO2 12 Zone, w/HHT & Gateway | |
RLDS CO2 16 Zone |
RLDS 4 Zone, w/HHT & Gateway | |
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PART # | RLDS CO2 16 Zone, w/HHT & Gateway |
PART # | RLDS 4 Zone, w/HHT & Gateway |
DESCRIPTION | RLDS 8 Zone |
RLDS 8 Zone, w/HHT & Gateway | |
RLDS 12 Zone |
808-2008 | |
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RLDS 12 Zone, w/HHT & Gateway | |
PART # | RLDS 16 Zone |
DESCRIPTION | RLDS 16 Zone, w/HHT & Gateway |
RLDS CO2 4 Zone | |
RLDS CO2 4 Zone, w/HHT & Gateway |
RLDS 8 Zone |
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808-2009 |
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RLDS 8 Zone, w/HHT & Gateway |
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808-2012 |
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RLDS 12 Zone |
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808-2013 |
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RLDS 12 Zone, w/HHT & Gateway |
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808-2016 |
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RLDS 16 Zone |
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808-2017 |
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RLDS 16 Zone, w/HHT & Gateway |
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808-2104 |
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RLDS CO2 4 Zone |
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808-2105 |
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RLDS CO2 4 Zone, w/HHT & Gateway |
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808-2108 |
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RLDS CO2 8 Zone |
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808-2109 |
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RLDS CO2 8 Zone, w/HHT & Gateway |
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808-2112 |
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RLDS CO2 12 Zone |
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808-2113 |
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RLDS CO2 12 Zone, w/HHT & Gateway |
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808-2116 |
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RLDS CO2 16 Zone |
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808-2117 |
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RLDS CO2 16 Zone, w/HHT & Gateway |
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