Monitor Specifications

Operational Temperature: -20 to 80°C Storage Temperature: -30 to 85°C Transmission Frequency: 433.92MHz Charger Input Voltage: DC 8 to 30V Size: 116(L) x 68(W) x25 (H)mm Weight: 138g

Internal Valve Sensor Specifications - Optional

Operational Temperature: -40 to 80°C Storage Temperature: -40 to 85°C Pressure Range: 0 to 8BAR, 0~116PSI Pressure Accuracy: ±0.1BAR, ±1.5PSI Temperature Accuracy: ±3°C Transmission Power:<10dBm Transmission Frequency: 433.92MHz Battery life: Up to 5 years Size: Size: 60(L) x 35(W) x21(H)mm Weight: 48g

SKU	TP-21SI
Barcode #	2000000002750
Brand	Masten
Shipping Weight	0.6000kg
Shipping Width	0.280m
Shipping Height	0.080m
Shipping Length	0.200m
Assembled Width	0.280m

2 Year Warranty 1 Year Warranty on Sensors   FAQ Changing the Pressure Alarm Ranges Our TP-19 and TP-20 monitors default alarm settings are as follows:

• High pressure: 175PSI - NOTE. the Minimum Alarm Range for these models is 3PSI.
• Low pressure: 100PSI

If you need to re-set the high pressure alert range below 100PSI and find the high pressure setting range is from 100PSI to 218PSI (due to the low pressure setting max. data is 100PSI). This is normal. You will need to set the low pressure first, and then the high pressure again, for example, please set the first axle 1 low pressure to 30PSI, and then set axle 1 high pressure, the high pressure setting range for the axle 1 will be from 32PSI to 218PSI. Due to the caravan pressure alert range usually from 30PSI to 50PSI. So please re-set the low pressure of all axles to 30PSI and then scroll to re-set high pressure to 50PSI again. Normal re-setting step as below:

1. Turn on the monitor.
2. In normal mode, press the SET button for 3 seconds. You will hear a beep when you release.
3. Press the SET button to scroll through the different settings, the sequence is pressure unit, temperature unit, axle 1 two tires high pressure, axle 1 two tires low pressure, axle 2 four tires high pressure, axle 2 four tires low pressure, axle 3 four tires high pressure, axle 3 four tires low pressure, trailer axle 12 tires high pressure, trailer axle 12 tires low pressure, all tires high temperature.
4. Press the + or - button to change the setting data.
5. Press SET button for 3 seconds with a beep to save the new setting.

If you want recover to the default setting, press and hold the SET button without release, then turn off the switch and turn on the switch with a beep. Default setting is restored successfully.