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The Grain Temp Guard Humidity-Temperature system is ideal for monitoring higher moisture grains or grain you are conditioning. Track grain conditioning with the humidity reading and data charts from our resources page. High and low temp/humidity warnings may be set independently on each function. Audible and visual alarm sounds when detecting changes in target temperature/humidity. The Grain Temp Guard Dual Temperature System is ideal for monitoring conditioned grains. Measure temperature in two distinct locations. High and low temp warnings may be set independently on each probe.

How It Works

moisture monitoring systems

Available in Dual-Temp or Humidity-Temp

Detect hot spots or moisture buildup

Alerts you of reading outside normal range

Sidewall and door mounting kits available

Grain Temp Guard

  • Sealed poly case with polycarbonate clear cover for easy visualization
  • Easy to open latch style cover for setting
  • Visual and audio alarm on a 10 m cord for mounting in a more accessible area
  • 15m Probes come standard with the unit
  • Monitor temperature and humidity at one location in the grain bin
  • A must-have for conditioning grain (utilizing fans to lower grain moisture)
  • Trigger visual and audio alarm based on a high and low trigger point set by the operator for temperature and humidity

Over-drying corn or beans reduce your product by 1 1/2% for each 1% moisture loss.

Based on current prices, in a 30,000 bushel bin this costs:

  • $1650 for corn
  • $3850 for beans
  • Money spent to put an alarm HT probe in the top (this can be placed after the bin is full) of the bin and one in the bottom would go a long way to help a farmer get control of this.

Recommendations for the number of probes to consider for your bin

  • Recommended: 2 probes per bin for the first 10,000 to 20,000 bushels and 1 additional probe for each additional 10,000 to 15,000 bushels. This will allow you to monitor more layers through the bin.
  • When using the Alarm HT (the correct unit for monitoring bins in which you are doing in bin drying or for monitoring soybeans) you will need to purchase twice as many units because this device has only 1 cable per monitoring unit. It is using its function to monitor both temperature and humidity (humidity is the key to providing the best grain moisture solution).

Grain Temp Guard Install Instructions

Grain Temp Guard Products

Grain Temp Guard®

Are you monitoring your older bins? The Grain Temp Guard by Farm Shop MFG is a low-cost solution for existing as well as new bins.

Sealed poly case with polycarbonate clear cover for easy visualization

Easy to open latch style cover for setting

110 V external power with internal battery backup

Visual and audio alarm on a 10 m cord for mounting in a more accessible area

15m probes come standard with the unit

Additional probe lengths available: 10 m, 15 m, 25 m, 30 m and 45 m

Monitor two separate locations within the bin, for temperature with one unit, dual probe

Ideal for monitoring store dried grain

Trigger visual and audio alarm based on a high and low trigger point set by the operator for each temperature probe

Alarm can be set to alert you when fronts have moved through the entire bin

COMING SOON: Ability for the system to control bin fans (weather depending)

Why Germinator® is the Solution

The wheels of the Germinator closing wheel are engineered in such a way that they are highly effective in all tillage and soil conditions. The closing wheel for planters is suitable for planting soy, corn, sun flowers, sugar beats, dry beans , and other “row” crops. Due to the innovative and unique design, the Germinator closing wheel prevents air pockets and covers the seed ‘V’ properly in order to create better seed-to-soil contact.

Installing Grain Temp Guard

1. Identify the location on the bin where you would like to position the unit. Do not position the unit in a location on the south or southwest side of the bin where afternoon sun will shine directly at the electronics (direct sunshine into the polycarbonate clear cover will result in a greenhouse type solar heating and can increase the internal temperature by 35°F to 50°F as compared to outside environment, thereby damaging the electronics). If you position the unit on the south or southwest side, it needs to be in a shaded area. Failure to do this will damage the LED screen and void the warranty. Additionally, you may want to consider an area in proximity to the internal ladder, as we normally use this structure to zip tie the cable to. Any loose cable on the outside the bin needs to be zip tied to a structure such as conduit, ladder rails, etc. to prevent wind whipping and chafing of the insulation. It is not recommended that you have long lengths of exposed cable on the outside of the bin. If this is necessary, it is recommended that you place the cable inside a conduit.
2. Mount the case to the bin; mounting flanges may be adjusted for the best match to a corrugation rib. Remove the gasket from the self-tapping screws, insert the screw through the flanged hole and replace the gasket. The gasket needs to be against the bin to prevent leakage.
3. The probe will require a three-quarter inch hole through the corrugation.
4. Suspend any loose cable within the bin by zip tying it frequently to conduit or sliding it through conduit.
5. A short arm can be made to suspend the lower cable 36 to 48 inches from the ladder by bending a piece of re-rod into an L and positioning the long leg inside a ladder angle iron in the short leg sticking out no more than a foot. Too long of a lever will be ripped off by corn pressure. The long leg should pass behind two ladder rungs and in front of the third (see above graphic) to ensure the mechanism functions properly. Zip tie the long leg of the L frequently or bolt it to ensure strength.
6. Zip tie short cable to the L and zip tie any excess cable in a loop firmly to the ladder structure.
7. Extend the long cable up along the ladder making a small loop of the excess cable and securing it to the top of the ladder or on a hook just below the access hatch. When the bin is full you will take this cable, uncoil it and position it in the grain where you would like to monitor the temperature or temperature – humidity.
The intent of this installation is to keep everything simple and cost-effective. You may at your own discretion provide a more complexed installation.

Shop Grain Temp Guard

Grain Temp Guard – 1st Generation


Introducing our Unbeatable Closeout Prices for the Revolutionary First Generation Grain Temp Guards!

We are thrilled to announce that we have recently upgraded our Grain Temp Guard lineup with the next generation of bin monitors. To make room for these cutting-edge models, we are offering unbeatable closeout prices on our first-generation units.

What sets the first generation apart? These Grain Temp Guards boast an impressive error rate of just 2% in their readings. However, with our new and improved next-generation models achieving an even lower error rate of 1%, we are eager to clear out our remaining first-generation stock.

Not sure which model to order? Our Grain Temp Guards are available in two variants:

  1. Dual Temp (DT): This model is equipped with probes strategically placed at two locations within your grain bin. By monitoring temperature variations across your grain, it provides valuable insights into potential hot spots.

  1. Humidity Temp (HT): With a single probe placed at a specific location in your bin, this model allows you to monitor both temperature change and humidity levels at that particular spot, tracking moisture and moisture migration in your bin.

The Grain Temp Guard is ideal for bins with a capacity of 20,000 bushels or less. If you have a larger bin, simply purchase an additional probe for every additional 10,000 bushels to ensure comprehensive monitoring.

For enhanced grain monitoring capabilities, consider bundling multiple DT and HT systems. This will unlock a host of benefits and elevate your grain monitoring plan to new heights.

The Grain Temp Guard system gives you valuable knowledge about your grain bin, enabling you to develop a personalized monitoring plan. Say goodbye to waiting until it’s too late to address issues. Stay proactive by detecting problems early and safeguard your grain effectively.


Take advantage of our unbeatable closeout prices and revolutionize your grain monitoring practices today!

Grain Temp Guard Door Mounting Kit


Door Mounting Kit

  • ¾  inch OD grommet
  • 1-3/16 OD cable gland
  • 1-3/16 hacksaw hole saw (quarter-inch pilot bit not included)


Grain Temp Guard Door Mounting Kit (no hole saw)

  • ¾  inch OD grommet
  • 1-3/16 OD cable gland

Why Grain Temp Guard?

Because grain is a good insulator, the center of the grain bin retains heat longer. Moisture migration is caused by differences in grain temperature within the bin. In the fall, the cold air on the outside of the bin moves the warmer air inward and eventually upward to the top of the bin. It encounters the cold air at the top of the bin and causes condensation and crusting at the top of the grain. In the spring and summer, the opposite is true and condensation and spoilage occur at the bottom of the bin. Temperature monitoring helps maintain even temperature, preventing moisture migration.

Recommended System and Probe Placement per Bin Size

  • 3,000 to 6,000 bushel bin: 1 EndZone, 1 Grain Temp Guard® Alarm HT
  • 7,000 to 15,000 bushel bin: 1 EndZone, 2 Grain Temp Guard® Alarm HT
  • 16,000 to 23,000 bushel bin: 1 EndZone, 3 Grain Temp Guard® Alarm HT
  • 24,000 to 30,000 bushel bin: 1 EndZone, 4 Grain Temp Guard® Alarm HT
  • 31,000 to 37,000 bushel bin: 1 EndZone, 5 Grain Temp Guard® Alarm HT
  • 38,000 to 44,000 bushel bin: 1 EndZone, 6 Grain Temp Guard® Alarm HT
  • 45,000 to 51,000 bushel bin: 1 EndZone, 7 Grain Temp Guard® Alarm HT
  • 52,000 to 59,000 bushel bin: 1 EndZone, 8 Grain Temp Guard® Alarm HT

Recommended System and Probe Placement per Bin Size