hour meters
LM Series AC/DC Hour Meters
Digital, backlit meter. UL/CE. IP67 sealed, shock-resistant case. 9 V to 64 V dc/ac (50 Hz to 500 Hz) operation
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Overview
Honeywell MCU (microcontroller unit) LCD (liquid crystal display) Hour Meters and Counters, LM Series, are sealed digital instruments designed to monitor and record elapsed running time, normally displayed in hours and tenths of hours. These devices are used to log running time of equipment or counts of equipment use for potential use in transportation applications to assure proper maintenance of expensive machines or systems, as well as warranty claims and rental-use tracking. This maintenance typically involves replacing, changing, or checking parts, belts, filters, oil, and lubrication of heavy duty equipment, or running condition of engines, motors, and blowers, to name a few.
These devices can feature up to a 40-year memory data retention (without power) to provide customers with a long data retention capability within their desired application. The large 7 mm display eases readability and offers backlight options and a running indicator. Sealing to IP67 (front)/IP66 (rear) designed to provide enhanced durability. The hour meter also features a long reset time to offer customers the protection against malfunction of reset.
The LM Series offers customization options including the customer’s logo, Honeywell logo, or a black face, as well as numerous customizable bezel options.
Specifications
Others
- Agency Approvals and Standards
- UL, CE
- Volts ac
- 9 V to 64 V
- Voltage
- 9 V to 64 V
- Vibration
- 20 g per SAE J1378; 10 g per MIL-M-3917D
- Transient Voltage Protection
- Load Dump, Inductive, EMI, Reverse Polarity
- Termination
- 1/4 inch Male Blade
- Terminal
- 2
- 3
- 4
- Temperature
- -40 °C to 85 °C [-40 °F to 185 °F]
- Shock
- 55 g per SAE J1378; 75 g per MIL-M-3917D
- Series Name
- LM
- Sealing
- IP67
- Run Indicator
- Yes
- Reverse Polarity
- Yes
- Quartz Accuracy
- ±200 ppm/hour
- Product Type
- MCU (Microcontroller Unit) LCD Hour Meter
- Power Draw
- 0.8 mA at 12 Vdc
- Number Size
- 7 mm [0.28 in]
- Mounting
- 2 Screw
- Logo Top
- Honeywell
- Logo Bottom
- Hours
- Lens
- Lexan
- Industry
- Aerospace
- Inductive Switching
- Yes
- Hours
- 0 to 99,999.9 hours
- Function
- Hour Meter
- Display
- 0 to 99,999.9 Hours, backlit
- Bezel
- Black
- Appearance
- Deluxe
Others
- Agency Approvals and Standards
- UL, CE
- Volts ac
- 9 V to 64 V
- Voltage
- 9 V to 64 V
- Vibration
- 20 g per SAE J1378; 10 g per MIL-M-3917D
- Transient Voltage Protection
- Load Dump, Inductive, EMI, Reverse Polarity
- Termination
- 1/4 inch Male Blade
- Terminal
- 2
- 3
- 4
- Temperature
- -40 °C to 85 °C [-40 °F to 185 °F]
- Shock
- 55 g per SAE J1378; 75 g per MIL-M-3917D
- Series Name
- LM
- Sealing
- IP67
- Run Indicator
- Yes
- Reverse Polarity
- Yes
- Quartz Accuracy
- ±200 ppm/hour
- Product Type
- MCU (Microcontroller Unit) LCD Hour Meter
- Power Draw
- 0.8 mA at 12 Vdc
- Number Size
- 7 mm [0.28 in]
- Mounting
- 2 Screw
- Logo Top
- Honeywell
- Logo Bottom
- Hours
- Lens
- Lexan
- Industry
- Aerospace
- Inductive Switching
- Yes
- Hours
- 0 to 99,999.9 hours
- Function
- Hour Meter
- Display
- 0 to 99,999.9 Hours, backlit
- Bezel
- Black
- Appearance
- Deluxe
- Agency Approvals and Standards : UL, CE
- Volts ac : 9 V to 64 V
- Voltage : 9 V to 64 V
- Vibration : 20 g per SAE J1378; 10 g per MIL-M-3917D
- Transient Voltage Protection : Load Dump, Inductive, EMI, Reverse Polarity
- Termination : 1/4 inch Male Blade
- Terminal : 2|3|4
- Temperature : -40 °C to 85 °C [-40 °F to 185 °F]
- Shock : 55 g per SAE J1378; 75 g per MIL-M-3917D
- Series Name : LM
- Sealing : IP67
- Run Indicator : Yes
- Reverse Polarity : Yes
- Quartz Accuracy : ±200 ppm/hour
- Product Type : MCU (Microcontroller Unit) LCD Hour Meter
- Power Draw : 0.8 mA at 12 Vdc
- Number Size : 7 mm [0.28 in]
- Mounting : 2 Screw
- Logo Top : Honeywell
- Logo Bottom : Hours
- Lens : Lexan
- Industry : Aerospace
- Inductive Switching : Yes
- Hours : 0 to 99,999.9 hours
- Function : Hour Meter
- Display : 0 to 99,999.9 Hours, backlit
- Bezel : Black
- Appearance : Deluxe
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Data Sheet
Name
Description
File Size
Date
Size
LM Series MCU (Microcontroller Unit) LCD Hour Meter
application/pdf 875.87 KB
9/20/2021
875.87 KB
Manuals and Guides
Name
Description
File Size
Date
Size
Industrial Product Line Card
application/pdf 2.24 MB
8/12/2025
2.24 MB
Controls, Monitors, and Pressure Switches Range Guide
application/pdf 5.52 MB
9/20/2021
5.52 MB
Brochure
Name
Description
File Size
Date
Size
Partners Providing Technical Safety and Productivity Solutions
application/pdf 1.04 MB
4/11/2024
1.04 MB
Catalog
Name
Description
File Size
Date
Size
Application Note
Name
Description
File Size
Date
Size
Sensors and Switches in Mobile Cranes
application/pdf 1.97 MB
12/21/2022
1.97 MB
Agricultural Vehicles
application/pdf 1.11 MB
8/20/2025
1.11 MB
Product Photo
Name
Description
File Size
Date
Size
ac/dc Hour Meters - LM Series Product Photos
application/zip 1.27 MB
9/20/2021
1.27 MB
Others
Name
Description
File Size
Date
Size
LM Series MCU (Microcontroller Unit) LCD Hour Meter Nomenclature Tree
application/postscript 887.51 KB
9/20/2021
887.51 KB
Name
Description
File Size
Date
Size
Partners Providing Technical Safety and Productivity Solutions
application/pdf 1.04 MB
4/11/2024
1.04 MB
Industrial Product Line Card
application/pdf 2.24 MB
8/12/2025
2.24 MB
LM Series MCU (Microcontroller Unit) LCD Hour Meter
application/pdf 875.87 KB
9/20/2021
875.87 KB
LM Series MCU (Microcontroller Unit) LCD Hour Meter Nomenclature Tree
application/postscript 887.51 KB
9/20/2021
887.51 KB
ac/dc Hour Meters - LM Series Product Photos
application/zip 1.27 MB
9/20/2021
1.27 MB
Sensors and Switches in Mobile Cranes
application/pdf 1.97 MB
12/21/2022
1.97 MB
Controls, Monitors, and Pressure Switches Range Guide
application/pdf 5.52 MB
9/20/2021
5.52 MB
Agricultural Vehicles
application/pdf 1.11 MB
8/20/2025
1.11 MB
Name
Description
File Size
Date
Size
LM Series MCU (Microcontroller Unit) LCD Hour Meter
875.87 KB
9/20/2021
Controls, Monitors, and Pressure Switches Range Guide
5.52 MB
9/20/2021
Partners Providing Technical Safety and Productivity Solutions
1.04 MB
4/11/2024
ac/dc Hour Meters - LM Series Product Photos
1.27 MB
9/20/2021
LM Series MCU (Microcontroller Unit) LCD Hour Meter Nomenclature Tree
887.51 KB
9/20/2021
Product Number
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LM-HB2AS-H31
LCD HOURMETER
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HB2AS-H31
LCD HOURMETER
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HD2AS-H11
LCD HOURMETER (2 SCREW MOUNT,2 TERMINALS
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HD2AS-H11
LCD HOURMETER (2 SCREW MOUNT,2 TERMINALS
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HH2AS-H11
Honeywell LM Series Hour Meter in a diamond shape with black bezel, two 14 inch blade terminals (positive, negative), 9 V to 64 V voltage range, and the Honeywell logo on the face
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HH2AS-H11
Honeywell LM Series Hour Meter in a diamond shape with black bezel, two 14 inch blade terminals (positive, negative), 9 V to 64 V voltage range, and the Honeywell logo on the face
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HH3AS-H11
Honeywell LM Series Hour Meter in a diamond shape with black bezel, three 14 inch blade terminals (positive, negative, enable), 9 V to 64 V voltage range, and the Honeywell logo on the face
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HH3AS-H11
Honeywell LM Series Hour Meter in a diamond shape with black bezel, three 14 inch blade terminals (positive, negative, enable), 9 V to 64 V voltage range, and the Honeywell logo on the face
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HH3AS-H21
LCD HOURMETER (3 TERMINALS,WITH ENABLE)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HH3AS-H21
LCD HOURMETER (3 TERMINALS,WITH ENABLE)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HHFAS-H21
LCD HOURMETER (WITH BACKLIGHT,ENABLE)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HHFAS-H21
LCD HOURMETER (WITH BACKLIGHT,ENABLE)
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HW2AS-H11
LCD HOURMETER,2 TERMINALS (2.27 INCH DIA
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
LM-HW2AS-H11
LCD HOURMETER,2 TERMINALS (2.27 INCH DIA
https://s7d1.scene7.com/is/image/Honeywell65/sps-siot-honeywell-hour-meter-lm-hs4as-h-highres-ciid-160995
